Flow Process of Water Ring Vacuum Pump

Water ring vacuum pump belongs to rough vacuum pump. It is widely used in petroleum, chemical industry, metallurgy, mining, power, light industry, medicine, food and general industry. It is an indispensable basic product that directly affects the performance and quality of vacuum equipment. The development of water-ring vacuum pumps at home and abroad is comprehensively described and analyzed through data investigation and practical investigation. The basic structural characteristics of water-ring vacuum pumps are analyzed. The necessity of research on water-ring vacuum pumps is confirmed.

Through in-depth analysis, the parameters that determine the performance and structure of water ring vacuum pump are impeller radius R, impeller wheel ratio v, eccentricity e, impeller blade number Z, impeller width B, blade inclination angle, impeller submergence in the liquid ring h, impeller speed n, pumping rate and ultimate pressure, etc. The shape, position, blade outlet angle beta and circumferential velocity U of suction and exhaust outlet have great influence on the performance of water ring vacuum pump.

Impeller design is a universal problem. Comparing the shape design of radial impeller, tangential impeller and curved impeller, the structure of curved impeller is reasonable, the compression is good and the efficiency is high. But through the comparison of various impellers, the stress and strain values of radial impeller and curved impeller are larger, which is determined by their structure. For the design of impeller, not only the influence of shape characteristics, but also the strength and manufacturing problems should be considered.

The flow process in the water ring vacuum pump is much more complicated than that in the vane pump. Considering the complexity of the force acting on the impeller of a water ring vacuum pump during its rotating cycle, this paper divides a cycle of the impeller into intake zone, compression zone, exhaust zone and dead zone. According to the pressure of each zone, this regular variable force is found to analyze the strength of the impeller. From the analysis of stress, strain and displacement diagram, it can be seen that the stress and strain of the impeller are maximum in the compression zone because of the uneven distribution of pressure on the impeller, but the stress and strain of any impeller are within the allowable range. It should be noted that when the rotating speed is high and the pressure is high, the reaction effect of the liquid ring needs to be considered. In addition, the blade on the impeller is always in alternating state with the impeller's rotation, and the fatigue effect should also be considered.

In the design of water ring pump, it is very important to determine the circumferential speed of impeller, because the circumferential speed has a great influence on the pump performance, which can be said to be global. Other parameters of the pump, such as critical compression ratio, limit vacuum, efficiency and so on, are closely related to the circumferential velocity. Generally speaking, if the circumferential velocity is too small, the pump will not reach the predetermined critical compression ratio, and the limit vacuum will also decrease, resulting in the narrowing of the working range of the pump and the increase of the axial power in the high vacuum region. On the other hand, if the circumferential velocity is too large, the critical compression ratio of the pump can be improved, although it can be improved. And the limit vacuum, but excessive cycle speed will reduce the efficiency of the pump, and the shaft power will also rise. Moreover, under the influence of the vaporization pressure of the liquid ring medium, excessive cycle speed will not increase the critical compression ratio proportionally. Therefore, the selection of cycle speed should not be too large. How to reasonably select the cycle speed so that the pump has satisfactory performance and small energy consumption is worth discussing when designing the water ring pump. Problem.

When the impeller rotates and drives the liquid to rotate to form a liquid ring, the liquid ring, as a boundary of the closed chamber, continuously obtains kinetic energy from the impeller in the suction zone, and its velocity increases continuously until the circumferential velocity of the impeller at the maximum eccentric point on the impeller reaches the maximum value at the site. In the compression zone, it works on the gas in the form of "active cold", and transfers part of the kinetic energy obtained from the impeller to the gas so as to make the gas pressure. With the increase of force, the working process of the water ring pump is actually the most energy conversion process among impellers, liquid rings and gases, which abides by the law of energy level street. Among them, the kinetic energy of the liquid ring depends on the circumferential velocity of the impeller. If the circumferential velocity is high, the kinetic energy obtained by liquid from impeller is large, and the function of liquid to gas is strong, which means that a certain volume of gas can obtain a higher compression ratio; on the contrary, the function of liquid to gas is weak.

Water-ring-Vacuum-Pump-Applicable-Industry

Water-Ring-Vacuum-Pump-in-Fire-Fighting-Equipment

Rotary-vane-vacuum-pump-in-natural-gas-treatment-process

Small rotary vane vacuum pump

Small vacuum pumps are not suitable for the removal of corrosive ferrous metals, chemical reactions on pump oil, gases containing particulate dust, and toxic gases containing too much oxygen and explosive. It can not be used as a transmission pump (i.e. pumping from one container to another).

The circumferential motion of the small vacuum pump motor makes the diaphragm inside the pump reciprocating by mechanical device, thus compresses and stretches the air in the fixed volume pump chamber to form a vacuum (negative pressure). Under the action of the pressure difference, the gas pressure (suction) is put into the pump chamber and then discharged from the exhaust outlet.

Attention should be paid to the use of small vacuum pumps:

1. Start-up with load.

If a small vacuum pump has a vacuum in its suction port or a pressure in its exhaust port before starting, another technical parameter of the pump should be considered: the maximum start-up load of the intake port and the maximum start-up load of the exhaust port.

2. Medium temperature of small vacuum pump. According to the temperature of the medium gas passing through the pump, choose the ordinary type or the high temperature type.

3. Reliability of small vacuum pumps. According to the severity of the consequences of the failure of the micro-pump, it is completely in accordance with its own requirements. Special attention is paid to the fact that this parameter is measured under full load and uninterrupted operation, which is the worst working condition. If the actual operation is not full load or continuous operation, the value will be higher, depending on the working condition of the pump. This performance is a test of the manufacturer's technical strength. From the appearance of the product, we can see some, such as the use of special motors rather than ordinary low-cost motors, the weight is relatively heavy in the case of comparable volume, and so on. According to the price of the product, we can also know a little.

4. Electromagnetic interference of small vacuum pump. If a small vacuum pump is controlled by a precise circuit, it may be necessary to order a small vacuum pump with low electromagnetic interference, depending on the anti-interference capability of the circuit.

The working fluids of two series of rotary vane vacuum pumps and water ring vacuum pumps in vacuum pumps are vacuum pump oil and water as working fluids to seal, so as to achieve the purpose of vacuum pumps. But in some vacuum processes, oil-free vacuum pump is required. Oil-free vacuum pump is a single-stage rotary vane vacuum pump. Basic equipment for extracting gases from sealed containers to obtain vacuum.

The pump can be used for air conditioning, refrigeration equipment repair, medical equipment suction device, printing machinery, vacuum packaging, vacuum plastic suction, physical and chemical experiments and small devices requiring vacuum environment, etc. It can also be used as a small oil booster pump, oil diffusion pump, molecular pump and other front-stage pumps. The pump is not suitable for the removal of corrosive ferrous metals, chemical reactions on the pump oil, gas containing particulate dust, as well as excessive oxygen, explosive toxic gases. It can not be used as a transmission pump (i.e. pumping from one container to another).

Mini-Oil-Silent-Rotary-Vane-Lab-Vacuum-Pump

2BE1-Liquid-Ring-Vacuum-Pump-Factory-Price

Roots-Blower-Pumps-Used-for-Chemical-Industrial-Vacuum-Drying

Water Ring Vacuum Pump Advantages

From the point of view of the development of the overall function strength of the water ring vacuum pump, driven by the continuous improvement of the overall level of the product, it is necessary to make full use of the practical performance of all aspects of the product, constantly reflect the performance of the development of the overall application value advantage, further develop the effective application of the overall strength of the product, and at the same time, to promote the effective expression of its product strength by reliable quality. Ping incessantly reflects the inherent practical ability, fully reflects the powerful superiority of the equipment, and provides users with reliable and practical play.

At the same time, we should focus on the development of the overall value application performance of the water ring vacuum pump, develop the overall improvement of its practical performance, make use of the needs of various aspects of product performance development, and promote the effective operation of its quality development with reliable product strength guarantee. Through the overall development of the equipment, we should constantly develop its overall advantage role with high-efficiency quality strength, and make full use of it as a whole. Quality strength reflects the actual effect of overall development and the pioneering performance of product application strength in all aspects.

For the development of water-ring vacuum pump, we should continue to develop the practical performance with the performance advantage of the product, so that the overall level of the product can further reflect the effective development of the practical performance, and use its inherent practical performance to expand the development of its overall quality, which fully reflects the continuous development of the overall application advantage.

Vacuum-Dryer-Characteristics

Water-ring-vacuum-pump-in-grain-industry

Water-Ring-Vacuum-Pump-Equipment-Installation

Vacuum-Pump-Salt-Making-Industry

Water Ring Vacuum Pumps Classification

Equipment is the basis of production, so whether it can be used normally and efficiently is directly related to whether production can be carried out efficiently, which requires us to standardize operation in use, and daily maintenance can not be ignored, but the premise is to select a truly suitable equipment, and there are many types of water-ring vacuum pump, each of which has its own characteristics. Applicable places are also different. In order to facilitate your choice, the following sections introduce 2BV water ring vacuum pump, SK water ring vacuum pump and 2SK water ring vacuum pump for your choice. Friends in need can refer to them:

2BV Water Ring Pump

Suitable for gas and water vapor extraction. The suction pressure can reach 33 mbar absolute pressure (97% vacuum degree). When transformer oil is used as working fluid (called oil ring vacuum pump), the suction pressure can reach 6.7 mbar absolute pressure (99.3% vacuum degree), which can completely replace the reciprocating type.

2BE Water Ring Pump

This equipment belongs to high efficiency and energy saving products. It is usually used for pumping gases without solid particles, insoluble in water and non-corrosive in order to form vacuum and pressure in sealed containers.

SK Water Ring Pump

This type is used to suck or press air and other non-corrosive, water-insoluble, solid-free gases in order to form vacuum and pressure in sealed containers to meet the process requirements. Inhaled or pressurized gases are allowed to be mixed with a small amount of liquid. Because the compression process of gas is isothermal in the working process, it is not easy to cause danger when compressing and sucking explosive gas, so it is more widely used. The working vacuum range is - 0.03 - 0.08MPa.

2SK Water Ring Pumps

This series is equivalent to two SK Series in series. Since SK series can only reach the ultimate vacuum of - 700 mmHg, 2SK series has been developed to achieve higher vacuum and higher pumping rate under high vacuum.

Through the introduction of various categories of water-ring vacuum pump, we can understand the characteristics and application of each classification, which is helpful for the future purchase. Only by choosing the appropriate equipment can we give full play to its performance advantages and improve production efficiency.

Vacuum-pump-equipment-suitable-for-degassing-process

Vacuum-pump-for-pneumatic-conveying

Vacuum-Pump-Vacuum-Drying-Technology

How to Start Water Ring Vacuum Pump Correctly

Water ring vacuum pump is widely used because of its convenient operation and high production efficiency, so it has been widely concerned. In order to better use the equipment, it is very important to regulate its operation. First, how to start correctly is very important. Let's take a look at the following:

1. Close the gate valve on the intake pipe.

2. Start the motor. Pumps are mechanical seals, so the mechanical seals should be watered before starting the motor.

3. Open the valve on the water supply pipe, or supply water directly to the pump with tap water, so as to gradually increase the water supply until the water supply meets the requirements.

4. When the water ring vacuum pump reaches the limit vacuum or high pressure, it opens the valve in the intake pipeline and the equipment starts to work normally.

5. To adjust the packing cap, the situation of water droplets dropping out is better.

6. The air-water separator is adjusted by the valve to supply water to the pump in order to operate under the required conditions, so that the power consumption can be reduced and the working requirements can be met.

7. Adjust the water supply to the gas-water separator of the water supply pipe, and use the small water consumption as far as possible, so as to ensure the technical specifications required in the water ring vacuum pump.

8. When the pump works under the limit pressure, explosion may occur due to physical action, but the power consumption does not increase. At this time, the valve on the gas pipeline can be opened to let a small amount of gas in.

Nowadays, with the increasing use of water ring vacuum pumps, there are many manufacturers in the market. Xiaobian reminds us that in addition to selecting the right type, it is also important to select the right manufacturer, so that the quality of products can be guaranteed.

Oil-Diffusion-Vacuum-Pump-Application

Vacuum-Pump-Food-Packaging-Technology

How-to-Solve-Oil-Return-of-Diffusion-Vacuum-Pump

Application Field of Vacuum Pump Unit

The scroll pump of vacuum pump unit has been widely used in many fields: 1. Semiconductor industry: thin film manufacturing equipment, semiconductor device packaging equipment;


(2) Scientific instrument industry: synchrotron radiation beam machine, electron microscope, Aurora test equipment of vacuum pump unit, analysis and test instrument;

(3) Machinery and equipment industry: material preparation equipment, vacuum detection equipment, vacuum filtration equipment, material purification equipment, ultra-high vacuum exhaust equipment;

(4) Medical equipment industry: dental equipment, dialysis machine; Biological products industry: material purification and drug preparation;

(5)Packaging industry: food, medicine, biological products and other packaging equipment;

(6)Vacuum metallurgy industry: vacuum furnace, nano-material preparation equipment, vacuum detection equipment and other fields. The scroll pump as the front pump of the molecular pump and the small cryopump is the best configuration to obtain the oil-free vacuum system. Its main moving parts have only one moving scroll disc, so the power transmission is simple. Under the same size, the moving radius is small, the parts are few, the structure is simple and compact, the size of the whole machine is small, the clearance between the dynamic and static scroll discs, between the moving disc and the pump chamber is small, and there is no friction between the moving parts in the pump and the pump chamber, so there is almost no wear, stable operation, low power consumption, small gas flow loss, and the work can be done. High reliability, long life, easy maintenance, low maintenance cost, high volume efficiency. Air cooling without water cooling.

The scroll vacuum pump has a high compression ratio and a stable pumping speed in a wide pressure range. Because the volume change of the compression chamber is continuous, the driving torque change is small, the power change is small, and the vibration noise is low, which is not available for other types of dry vacuum pumps. In order to realize the effective work of the scroll pump, it is necessary to make the scroll profile mesh well in each vacuum chamber to avoid the worsening of the force on the scroll wall, thermal deformation, high-pressure gas retention in the exhaust chamber and the reduction of the efficiency of the vacuum pump caused by the large pressure difference of the vacuum chamber and other factors. Therefore, the accurate inclusion and meshing between the scroll profiles should be ensured, and the leakage of working medium should be controlled to achieve the purpose of pumping. This is an important basis for the design of scroll pump structure.

In the pumping passage of the pump, there is no need to use any oil and sealed liquid as the medium. Relying on the relative rotation of the dynamic and static scroll discs, the suction chamber and the compression chamber will be exhausted to continuously complete the suction, compression and exhaust process. Therefore, how to prevent leakage to solve the sealing problem is particularly important. The seal of the scroll pump mainly includes the radial seal of the axial meshing clearance and the tangential seal of the radial meshing clearance, namely the tooth side seal.

Liquid-Ring-Vacuum-Pump-for-Food-Industry

Single-Stage-Rotary-Vane-Vacuum-Pump

Roots-Vacuum-Pump-suppliers

Tri-Lobe-Roots-Vacuum-Pump

Water Ring Vacuum Pump Corrosion Repair

After using water ring vacuum pump for a period of time, if the maintenance is not in place, it is easy to cause corrosion, which can be divided into two categories: overall corrosion and local corrosion. The former occurs more evenly on all surfaces of the equipment, while the latter occurs only locally. For example, pitting corrosion, crevice corrosion, intergranular corrosion, stress corrosion cracking, corrosion fatigue, hydrogen corrosion cracking, wear corrosion, delamination corrosion and so on. After serious corrosion, the working efficiency of the equipment is reduced and even needs to be replaced. Enterprises invest heavily. Corrosion repair is the key to solve this kind of problem.

Repair steps:

(1) Surface treatment: thoroughly remove the oxide layer on the surface, and clean the surface with acetone.

(2) Harmonizing material: Harmonize strictly according to the proportion, and mix evenly until there is no color difference.

(3) Daubing material: first, apply a thin layer of material, to ensure that the bonding and full coverage, and then evenly apply the material to the repair surface, to meet the required repair thickness can be.

(4) Curing: 24 hours/24 C (material temperature). The curing time can be reduced by half for every 11 C increase in material temperature, but the increase temperature should not exceed the material's withstanding temperature.

(5) Installation and precautions: Installation should be carried out according to assembly requirements. Repair and protection materials should avoid being knocked or impacted by external forces. If materials affect assembly, grinding method can be used to deal with them. Never knock, so as to avoid damaging other materials.

The application of polymer composite repairing materials in the corrosion protection of surface organic coatings is one of the effective measures to repair the corrosion of water ring vacuum pumps. Surface adhesion protection can be widely used in the repair and pre-protection of abrasion, cavitation and corrosion parts. It has good chemical resistance, excellent mechanical properties and bonding properties. Compared with the traditional welding repair of pressure vessel, it has the characteristics of simple construction, low cost, safety performance and good repair effect.

Principle-of-Gas-liquid-Separation-Technology-for-Vacuum-Pump

Latest-Liquid-Ring-Vacuum-Pump-System

How-to-Solve-the-Injection-of-Rotary-Vacuum-Pump

How-to-Solve-High-Temperature-of-Vacuum-Pump

Liquid Ring Vacuum Compressor Selection

In fact, the realization of technological process often has a great relationship with the adaptability of equipment. Therefore, the selection of appropriate type and design requirements of water ring vacuum pump is an important prerequisite for completing production tasks and achieving good benefits. The following points are summarized for you:

1. The working pressure should meet the requirement of the limit vacuum and working pressure of the equipment.

2. Choose the working point of the equipment correctly. Each pump has a certain range of working pressure.

3. Under its working pressure, the equipment should be able to discharge all the gas produced in the process.

4. Correct combination. Because the equipment has selective air pumping, sometimes the selection of one equipment can not meet the requirements of air pumping, and several combinations are needed to complement each other to meet the requirements of air pumping.

5. Understand the requirements of equipment for oil pollution. If the equipment is strictly oil-free, we should choose all kinds of oil-free types; if the requirements are not strict, we can choose oil, plus some anti-oil pollution measures, such as refrigeration trap, baffle, oil trap, etc., can also meet the requirements of clean vacuum.

6. Understand the composition of the exhausted gas. The gas contains no condensable vapor, particulate dust, corrosion and so on. Select the appropriate pump for the exhausted gas. If the gas contains vapor, particles, and corrosive gases, it should be considered to install auxiliary equipment such as condenser, dust collector in the intake pipeline of the pump.

7. How does the oil vapor discharged from the equipment affect the environment? If the environment is not allowed to be polluted, oil-free ones can be chosen, or oil vapor can be discharged outdoors.

8. Whether the vibration caused by the working equipment has an impact on the process and environment. If the process is not allowed, vibration-free pumps or anti-vibration measures should be selected.

Above is the key point of water ring vacuum pump selection. In addition, according to the actual situation, we also need to consider equipment operation and maintenance costs, and ultimately choose a suitable equipment.

liquid-ring-vacuum-compressor-of-Deaeration

Heavy-duty-water-liquid-ring-vacuum-compressor

Best-liquid-ring-vacuum-compressor

Water Ring Vacuum Pump Characteristics

The water ring vacuum pump is obviously different from other similar products. It can be seen from the application field that the market share is very high. There are reasons why the equipment behaves so well. The key points are found from the characteristics of the product. Starting from the characteristics of the water ring vacuum pump, this article will tell you about:

1. The structure is simple, the manufacturing accuracy is not high, and it is easy to process.

2. Compact structure, high speed pump, generally can be directly connected with the motor, without the need for deceleration device. Therefore, with a small structure size, we can get a large amount of exhaust gas and occupy a small area.

3. Compressed gases are basically isothermal, i.e. the temperature change of compressed gases is very small.

4. Because there is no metal friction surface in the pump chamber, there is no need to lubricate the pump, and the wear is very small. The sealing between the rotating part and the fixing part can be accomplished directly by the water seal.

5. Inhalation uniformity, stable and reliable work, simple operation and convenient maintenance.

In addition, the compressed gas temperature of water-ring vacuum pump is low, and the exhaust temperature is only 10-15 C higher than the intake temperature. Because of this characteristic, it is very easy to suck inflammable and explosive gas.

Water-Ring-Vacuum-Compressor-in-Power-Plant

stainless-steel-liquid-ring-vacuum-compressor-for-pumping-gases

Chemical-equipment-liquid-ring-vacuum-pump-compressor

Water Ring Vacuum Pump Operating Principle

The appearance of water-ring vacuum pump greatly improves our working efficiency. Let's take a brief look at the working principle of water-ring vacuum pump.

Water-ring vacuum pump (hereinafter referred to as water-ring pump) is a kind of coarse vacuum pump. The maximum vacuum it can obtain is 2000-4000Pa, and the air ejector in series can reach 270-670Pa. Water ring pump can also be used as a compressor, called water ring compressor, is attributed to low pressure compressor, its pressure planning is 1 ~ 2 *105Pa gauge pressure.

Water ring pump is used as self-suction pump at the beginning, and then gradually used in many industrial sectors such as petroleum, chemical industry, machinery, mining, light industry, medicine and food.

In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, water ring pumps are widely used. Due to the rapid development of vacuum application skills, water ring pumps have always been taken seriously in obtaining rough vacuum. Because the gas in the water ring pump is isothermal, it can extract flammable and explosive gases. In addition, it can also extract dust and water-bearing gases. Therefore, the use of water ring pump is increasing.

The pump body is equipped with appropriate water as working fluid. When the impeller rotates clockwise, the water is thrown to the adjacent area by the impeller. Because of the centrifugal force, the water forms a closed ring which is approximately equal in thickness depending on the shape of the pump chamber. The upper part of the water ring is just tangent to the hub of the impeller, and the lower part of the water ring is just in contact with the top of the blade (in practice, the blade has a certain penetration depth in the water ring). At this time, a one-month conodont space is formed between the hub and the water ring of the impeller, and this space is divided by several small cavities with the same number of dividend blades of the impeller. If the starting point is 0 degree above the impeller, the volume of the small chamber increases from small to large when the impeller rotates 180 degrees before rotation, and it is also connected with the suction port on the end face.

When the impeller continues to rotate, the small cavity becomes smaller and larger, making the gas compressed. When the small cavity is connected with the exhaust port, the gas is discharged out of the pump.

In summary, the water ring pump relies on the change of the volume of the pump chamber to complete the suction, contraction and exhaust, so it belongs to the variable volume vacuum pump.

Hot-sale-high-quality-liquid-ring-vacuum-pump

Oil-Free-rotary-vane-type-vacuum-pump-Price

Large-Power-Liquid-Ring-Vacuum-Pump

China-Supplier-Liquid-Ring-Vacuum-Pump

What are the advantages of water ring vacuum pump

Water ring vacuum pump is a kind of vacuum pump. Through its name, we can know that it is closely related to water and depends on the circulation of water. What advantages does it have? Xiaobian will lead you to see.

First, be able to work in harsh environments

Some industries work in a very unsatisfactory environment, such as metallurgy or chemical industry, there are many dust or solid impurities, even in such an environment, water ring vacuum pump can be used normally, water vapor, poison gas, flammable and explosive gas, these unusual environments, water ring vacuum pump can be pumped and transported, it can be very poor. In the environment, we want to create a vacuum environment, and it is also very safe, easy to operate, in printing and dyeing, metallurgy and many other fields have been recognized.

Second, the structure is simple and easy to use.

Its structure is simple and safe to use, and it is constantly improving the design and production process. Now the water ring vacuum pump can take water to absorb air, and individuals can assemble it. Its operation is integrated and convenient. No matter whether you have experience or not, you can safely use it to create a vacuum environment without damaging the vacuum pump, and the efficiency is also high. It's amazing.

Water ring vacuum pump is widely used in many fields, such as medicine, leather, electronics and so on.

Liquid-Ring-Vacuum-Pump-For-Suction-Pump

Water-Liquid-Ring-Pump-for-Vacuum-Evaporation

Factory-price-water-liquid-ring-vacuum-pump

How to deal with the rusting of water ring vacuum pump

How to deal with the rust of water ring vacuum pump? The motor can't turn. Can hydrochloric acid be used? Is the vacuum pump rusty, not the motor, but the motor can not move. Is the vacuum pump rusty or there is scale inside?

If scale can be soaked in oxalic acid, hydrochloric acid can also be used, but to control the concentration of hydrochloric acid, too high acidity will corrode the pump, if it is water rust, you can use oil lubrication, or use pipe pliers to move. Of course, hydrochloric acid can not be released. When the motor is fixed, it can pour some loosening fluid on the bearing, and after loosening, it can be poured with lubricating oil. This should be the result of poor maintenance in peacetime. When not in use for a long time, it is necessary to release the water and store the desiccant in the pump. Which water you can add a little rust inhibitor, it will be better.

The rust in the vacuum pump chamber is mainly caused by the excessive water temperature of the water ring pump. When the temperature is high, there will be scales. If there is more scales, there will be no clearance in the pump chamber, which will cause the vacuum pump to rotate immovably. The circulating water should control the water temperature. At present, there is no better solution, which is a disadvantage. Next, water should be released when it is no longer used. If you can add some oil to lubricate the impeller and pump chamber, it will run when you use the pump next time.

Water-ring-vacuum-pump-for-sterilization

2BV-liquid-ring-vacuum-pump-for-sale

liquid-ring-vacuum-pump-for-plastic-machinery

Freeze Dryer and Conventional Method

Freeze dryer is one of the drying methods, the purpose is to store goods. The damage, decay and deterioration of articles are mainly caused by external and internal factors, such as air, water, temperature and biology. The internal factors are mainly the metabolic function of biomass itself. If the function of external and internal factors can be reduced to a lower level, the object can be kept unchanged for a certain period of time. Freeze dryer has been widely used in chemistry, pharmaceutical industry, food industry and scientific research, especially in biological drugs containing bioactive substances.

Drying is a very ancient operation, but heating and drying of powders and biological products often results in irreversible agglomeration of particles, especially in the preparation of ultra-fine powders. The agglomeration of nanoparticles in liquid phase is difficult to disperse through drying. This is mainly due to the release of water from intergranular pore channels during the drying process of ordinary particles and the high additional pressure caused by surface tension. The particles are pressed together to form a mass. Freeze drying is a way to avoid this problem. Freeze drying is to freeze the gel or blood to be solid, and then vaporized the water in a reasonable condition to remove moisture. Because the process of ice gasification does not affect the coalescence of solid particles, it can preserve the original particles without being compressed and reunited. Freeze dryer is very suitable for biological products, such as blood, because it has no high temperature operation, can prevent the deterioration of biological products.

The drying products generally have the problems of shrinking volume and hardening texture. Most of the volatile components will be lost. Some thermosensitive substances will be denatured and deactivated, and some substances will even be oxidized. Therefore, the properties of dried products are quite different from those before drying. The principle of freeze-drying is basically below 0 C, that is, under the condition of product freezing, only when the residual moisture content of the product is reduced in the later stage, can the product be raised to above 0 C, but generally not more than 40. Under vacuum conditions, when water vapor is sublimated directly, the drug remains in the freezing ice shelf, forming a spongy porous structure, so the volume of the drug is almost unchanged after drying by freeze dryer. Before reuse, as long as water for injection is added, it will dissolve immediately.

There are many methods for drying the freeze dryer, such as drying, boiling, drying, spray drying and vacuum drying. However, the common drying methods are usually carried out at temperatures above 0 degrees Celsius or higher. The drying products generally have the problems of shrinking volume and hardening texture. Most of the volatile components will be lost. Some thermosensitive substances will be denatured and deactivated, and some substances will even be oxidized. Therefore, the properties of dried products are quite different from those before drying. The principle of freeze-drying is basically below 0 C, that is, under the condition of product freezing, only when the residual moisture content of the product is reduced in the later stage, can the product be raised to above 0 C, but generally not more than 40. Under vacuum conditions, when the water vapor is sublimated directly, the drug remains in the ice shelf when it is frozen, forming a porous structure similar to sponge, so its volume is almost unchanged after drying. Before reuse, as long as water for injection is added, it will dissolve immediately.

Mini-Small-Laboratory-Vacuum-Freeze-Dryer

Tabletop-Mini-Small-Laboratory-Vacuum-Freeze-Dryer

Vegetable-Fruit-Meat-Vacuum-Freeze-Dryer

China-Vegetable-Fruit-Meat-Vacuum-Freeze-Dryer

Vacuum Freeze Dryer Preparatory Work Analysis

Vacuum freeze dryer is an excellent drying method. Dryers can be preserved for a long time under sealed conditions without additives at room temperature. The structure of freeze-dried articles is porous and crisp, and the rehydration process is fast. The color, aroma, taste, shape and activity of the articles after rehydration are basically unchanged. Vacuum freeze-dryer is especially suitable for food, health care products and pharmaceutical industries. Vacuum freeze dryer is a drying technology that freezes wet material or solution to solid state at low temperature (-10 ~50 ~C), then sublimates water in it directly into gaseous state without liquid state under vacuum (1.3~13Pa), and finally dehydrates the material.

When using vacuum freeze dryer for the first time, the parts of the instrument must be thoroughly cleaned. The parts of stainless steel should be cleaned with ethanol, and the parts of plexiglass should be cleaned with normal saline. Ampoule bottles are cleaned by an ultrasonic cleaner.

Before freeze-drying, it must be pre-frozen. If you want to do so, you need to prepare a low-temperature refrigerator, a low-temperature refrigerator at minus 40 degrees Celsius or a low-temperature refrigerator at minus 80 degrees Celsius. It usually takes about four hours to put the articles ready for drying in a low-temperature refrigerator or liquid nitrogen. It can be observed directly from the outside. After the items are completely frozen, you can carry out the freeze-drying experiment and make the articles quickly. Move to the tray of vacuum freeze dryer to ensure the freeze drying effect.

The main engine is connected with the vacuum pump by a green vacuum tube, which is connected by an international standard clamp. In order to effectively prevent air leakage, a sealing rubber ring was designed inside the clamp. On the method of preventing air leakage, applying proper amount of vacuum grease on the rubber ring and clamping with clamps can make the joints more closely bonded together. If there is no clamping clamp, it will cause air leakage, resulting in the instrument panel display value greater than 20 PA during vacuum extraction. At this time, the tightness of vacuum pump and glass cover of vacuum freeze dryer should be checked.

There are two power sockets on the right side of the main body of the vacuum freeze dryer. One connects the power cord of the vacuum pump to the main body, and then plugs the total power supply of the second vacuum freeze dryer into the power supply.

Before the operation of the vacuum pump, it is necessary to check whether the vacuum pump oil is added or not, otherwise it will not work properly. Oil surface must not be lower than the midline of the oil mirror. When the vacuum pump is used at the beginning, it will shake strongly and become steady slowly.

If the air tightness is not good, some vacuum grease should be applied to the sealing rubber ring above the cold trap, the organic glass cover should be gently rotated on the rubber ring, and the air tightness should be tested by opening the vacuum pump of the vacuum freeze dryer. To ensure that the vacuum freeze dryer gas seal is complete.

Bench-Top-Mini-Small-Laboratory-Vacuum-Freeze-Dryer

Hot-Sale-Industrial-Vacuum-Freeze-Dryer

Hot-Sale-Food-Vacuum-Freeze-Dryer

How to use and use the laboratory freeze dryer

How to use the laboratory freeze dryer? How to use it? Shanghai Tianfeng Vacuum Freeze Dryer Equipment Manufacturer here to share with you, the current common laboratory freeze dryers are small bell-jacket equipment, its pre-freezing and drying are separated, not in situ.

I. Prefreezing Operation

(1) Turn on the refrigerator and pre-cool the equipment. When the temperature of the cold trap drops below - 40 C, the material can be pre-frozen.

(2) Put the material into the material tray (liquid is directly injected into the material tray, solid or bottled material is evenly placed on the material tray);

(3) Put the material tray into the pre-freezing rack, and the probe into the material tray to fully contact with the material, so as to reduce the error between the sample temperature and the actual temperature.

(4) Place the pre-freezing shelf in the cold trap;

(5) Cover the insulation cover;

(6) After pre-freezing until the temperature of each part of the material drops below the eutectic point of the material, the pre-freezing can be completed for about 1 hour and ready to enter the drying stage.

2. Drying operation

(1) Remove the pre-freezing rack from the cold trap;

(2) Remove the pre-frozen material and put it on the drying rack;

(3) Place the drying rack on the cold trap, as shown in the figure.

(4) On the premise that the sealing ring is intact and free of debris, cover the "plexiglass cylinder";

(5) Clockwise tighten the drain valve;

(6) Open the vacuum pump and the vacuum gauge. The vacuum degree decreases, and the value of vacuum degree < 20 PA is normal in general drying process.

(7) Hang the flask one by one and open the multi-manifold valve; close the multi-manifold valve after drying the material in the flask and remove the flask.

(8) After drying, first open the "water (air) valve" and then close the vacuum pump. Remove the plexiglass cover and collect the dried matter.

(9) Close the "water (air) valve", defrost the equipment, open the "water (air) valve" drainage after defrosting, wipe the equipment clean.

(10) When the vacuum pump is not working, cover the exhaust holes to prevent dust from entering.

Industrial-Food-Vacuum-Freeze-Dryer-Machine-Price

Instant-Meal-Vacuum-Freeze-Dryer

Universal-Industrial-Vacuum-Freeze-Dryers-Machine

Vacuum Oil Injection Equipment Technical Characteristics

It is used in power plant, power station, power company, power transformation industry, metallurgy, petrochemical, machinery, transportation, railway and other industries, such as power system, substation maintenance, installation and use.

It can also be used for vacuum oil injection, vacuum drying and hot oil circulation of transformers.

It is more advantageous to use this series of aircraft in high altitude areas.

Vacuum oil injection equipment technical characteristics :

Two-stage high vacuum, large pumping speed and advanced three-dimensional flash technology for dehydration and degassing can remove water, impurities, hydrocarbons and other harmful components quickly and efficiently.

High efficiency improves flash point and compressive strength of insulating oil.

It can satisfy the vacuum pumping and vacuum oil injection of transformer body at the installation or maintenance site.

Multi-stage precision filtering and encryption step by step can effectively remove mechanical impurities in oil.

Automatic constant temperature control, automatic liquid level control, automatic defoaming, automatic pressure protection.

Oil can be filtered online, and no one can run. The running state is shown by the indicator lamp.

The machine has humanized design, low noise, easy operation, long maintenance interval, low energy consumption and low operation cost.

The whole machine is equipped with interlocking safety protection, oil drainage system, vacuum system and heating system interlocking, to avoid misoperation.

Reaction pot body is neat, zero accessories are complete and intact.

Pressure gauges, vacuum gauges, thermometers, safety valves, valves and traps on the pot body shall be sensitive and accurate and shall be regularly checked and marked.

Safety protection, ventilation, explosion-proof and other devices are intact and reliable.

The oil level of reducer and all parts is normal.

The packing seal of stirring shaft is moderately compacted and leak-free.

What-is-pressure-swing-vacuum-drying-equipment

Casting-Vacuum-Casting-Equipment-pouring-Precautions

Vacuum-pouring-batching-process

Vacuum pressure impregnation equipment

The design is generally divided into four sections during the design of the vacuum pressure dip coating section: the dip-coating zone, the machine room, the control room and the drying room zone. Under the premise that the fire rating of the vacuum pressure dipping zone is determined, in order to design and construct the plant economically and reasonably, it is necessary to design the plant in a sub-region.

According to the design specifications for electrical installations in fire hazard environments, the explosive atmosphere shall be partitioned according to the frequency and duration of the explosive gas mixture as follows:

Zone 0: an environment in which continuous or long-term explosive gas mixtures occur;

Zone 1: An environment in which a gas mixture may explode during normal operation;

Zone 2: An environment in which an explosive gas mixture is unlikely to occur during normal operation, or an environment where only a short-lived explosive gas mixture is present, even if it occurs.

The immersion paint tank and the paint storage tank are arranged in the immersion paint zone, and the entire varnishing process of the motor is completed in the varnishing zone. The paint storage tank is a tank for storing insulating paint. Under normal circumstances, the lid of the paint storage tank will not open, and the tank is in a vacuum state. If the tank is not filled with an inert gas such as nitrogen, then the paint liquid in the paint storage tank The surface is a continuous release source. The dip-coating tank is a jar of motor immersion paint. The motor is hoisted in the immersion paint tank after vacuuming, painting, pressing, painting, and painting. Before the can lid is opened, the residual styrene vapor in the dip tank is pumped to the exhaust gas purification treatment device through the suction device of the tank body and the tank mouth, and is discharged at a high altitude, even though a small portion may be volatilized into the ambient air of the dip tank. It is only a short time.

What-is-Vacuum-Casting-Technology

Vacuum-Casting-Equipment-Characteristics

Casting-equipment-casting-mold-of-maintenance

Vacuum pump in vacuum drying

Vacuum pumps are widely used in vacuum drying process. The so-called vacuum drying is a kind of drying method in which the material is placed under negative pressure and the boiling point under negative pressure is appropriately reached by heating or the material is dried through the melting point after solidification by cooling. The boiling point of water in the material under negative pressure decreases with the increase of vacuum. At the same time, vacuum pump clearance dehumidification is used to reduce water vapor content, which makes the solution such as water in the material get enough kinetic energy to separate from the material surface.

Vacuum drying, because of the isolation of air under negative pressure, makes some materials which are easy to oxidize and other chemical changes in the drying process better maintain their original characteristics. It can also better protect materials by injecting inert gas and vacuum. Common vacuum drying equipment are: vacuum drying box, continuous vacuum drying equipment, etc.

The process of vacuum drying is to place the drying material in a sealed drying chamber and heat the drying material continuously while vacuuming with a vacuum system, so that the moisture in the material can diffuse to the surface through pressure difference or concentration difference. The water molecule can obtain enough kinetic energy on the surface of the material and escape to the low-pressure space of the vacuum chamber after overcoming the mutual attraction of the molecules. The process of empty pumping. In the vacuum drying process, the pressure in the drying chamber is always lower than the atmospheric pressure, the number of gas molecules is small, the density is low, the oxygen content is low, so it can dry materials which are easy to oxidize and deteriorate, inflammable and explosive dangerous goods, etc. It can play a certain role in disinfection and sterilization of drugs, food and biological products, and can reduce the chance of material contamination or inhibit the growth of some bacteria.

Because the temperature of water is proportional to the vapor pressure in the process of vaporization, the moisture in the material can vaporize at low temperature during vacuum drying, which can realize low temperature drying. This is beneficial to the drying of thermosensitive materials in some medicines, food and agricultural by-products.

vacuum-pumps-purchasing-guid

what-is-the-use-of-a-vacuum-pump

Vacuum pump manufacturers explain how to classify vacuum pumps

One of the most common operations in the food industry is the use of vacuum pumps to move liquids or solids from one location or processing step to another. The main parts of pump transportation are pipeline system and vacuum pump. Vacuum pumps are very different in type and principle. The selection should be based on the characteristics of the material to be conveyed. The most common type of vacuum pump is gear pump. No matter what kind of vacuum pump, the rotor rotates in the pump chamber, resulting in pressure difference. Inhaled food enters the pump chamber and constantly extrudes it. Obviously, a closed working chamber must be formed between the gear of this kind of pump and the pump chamber. Although such pumps are also used to transport liquids and slurries, and sometimes to transport materials with small blocks, it is possible to crush materials. Single screw pump may be an ideal device for conveying bulk materials with less crushing. This kind of pump is also called propelling cavity pump. It can form a continuous spiral space between the spiral rotor and the outer wall. When the rotor rotates, the food is pushed into the same size space by the helical inclined plane. Therefore, food such as corn kernels, grapes and even shrimps will not be destroyed.

Whatever type of vacuum pump is chosen, it should be noted that it is easy to disassemble and thoroughly clean up. The stainless steel sanitary pump commonly used nowadays can be disassembled in a few minutes with simple tools, which is very convenient.

Classification of Vacuum Pumps by Performance, Structure and Working Principle

(1) Classification by performance characteristics and use

(1) Low vacuum pump: The vacuum pump whose limit pressure is higher than 1.33Pa belongs to low vacuum pump. Common are reciprocating vacuum pump, rotary vacuum pump, water ring vacuum pump, jet vacuum pump and adsorption vacuum pump.

(2) Medium vacuum pump: the vacuum pump with the limit pressure between 10-2 and 1.33 PA belongs to the medium vacuum pump. Common are Roots vacuum pump, multi-stage jet vacuum pump and so on.

(3) High vacuum pump: vacuum pump with limit pressure of 10-6-10-2 PA belongs to high vacuum pump. Various diffusion pumps and molecular pumps belong to high vacuum pumps.

(4) Ultra-high vacuum pump: the vacuum pump whose limit pressure is less than 10-6 Pa belongs to ultra-high vacuum pump. Ultra-high vacuum pumps mainly include ion pumps, cryopumps and so on.

(2) Classification according to structural characteristics

Mechanical Volumetric Vacuum pump: This kind of pump relies on mechanical action to make the working volume of pump chamber change periodically to achieve the pumping effect. For example, reciprocating vacuum pumps and rotary mechanical pumps belong to this kind of pumps.

(2) Jet vacuum pump: This kind of pump has no mechanical moving parts. It mainly relies on the high-speed jet through the nozzle to vacuum. These pumps include steam jet pump, air jet pump, water jet pump and various diffusion pumps.

(3) Other types of vacuum pumps: most of these pumps belong to those that can obtain high vacuum, extremely high vacuum or high purity vacuum pumps, such as adsorption pumps, molecular pumps, ion pumps, condensation pumps, etc.

(3) According to the working principle, this is the basic classification of vacuum pumps. According to different working principles, various vacuum pumps can be divided into reciprocating, rotary vane, slide valve, mechanical pressurization, jet pump, diffusion pump, molecular pump, ion pump, condensation pump, etc.

Small-Cheap-Rotary-Piston-Vacuum-Pump

high-quality-2H-Series-Rotary-Piston-Vacuum-Pump

piston-type-vacuum-pump-for-industrial-vacuum-systems

Double-stage-Rotary-Piston-vacuum-pump

vacuum pump scope of application

Vacuum pumps include water ring pumps, reciprocating pumps, slide valve pumps, rotary vane pumps, Roots pumps and diffusion pumps. At present, these pumps are the essential main pumps in the application of vacuum technology in various industries of national economy. And today's edition to introduce you is the scope of application of vacuum pumps and the use of knowledge.

Application Scope and Knowledge of Vacuum Pump

1. Vacuum pump is the basic equipment used to extract gas from sealed container and obtain vacuum. It can be used independently, and can also be used as a front-stage pump and pre-pumping pump for various vacuum systems. It is widely used in medical, scientific research, chemical, laboratory, plastics, electronics and other industries, as well as in the manufacture of electric vacuum devices, bulbs, thermos bottles, vacuum welding, instruments and refrigeration equipment, printing and packaging machinery, etc.

2. Vacuum pump working environment: temperature 5 `C90% A inch, should open air ballast valve. 90% of the intake pressure is less than 10 torches, allowing long-term continuous operation. When the relative humidity of the exhausted gas is more than 90%, the air ballast valve should be opened.

3. The intake port of the vacuum pump shall be continuously open to the atmosphere for no more than three minutes.

4. Vacuum pumps are not suitable for extracting gases that are corrosive to metals, chemical reactions to pump oil, dust, and explosive gases with excessive oxygen content. This pump shall not be used as a compression pump or a conveyor pump.

Piston-Vacuum-Pump-for-liquid-oxygen

Rotary-Plunger-Piston-Vacuum-Pump-Manufacturer

High-Pressure-Mini-Plunger-Piston-vacuum-pump

Water Ring Vacuum Pump Types and Advantages and Disadvantages

Water ring vacuum pump is the most common type of liquid ring vacuum pump. The liquid ring vacuum pump is a multi-blade rotor eccentrically mounted in the pump housing. When it rotates, the liquid is thrown into the pump shell and a liquid ring concentric with the pump shell is formed. The liquid ring and the rotor blade form a rotating variable volume vacuum pump with periodic volume change. When working liquid is water, it is called water ring pump.

The water ring pump is mainly used in the process of rough vacuum and large pumping capacity. It has been widely used in chemical industry, petroleum, light industry, medicine and food industry, such as vacuum filtration, vacuum feeding, vacuum concentration, vacuum degassing, etc. The limit pressure of a single stage water ring pump can reach 8-2*103Pa, the limit pressure of a double stage water ring pump can reach 1*102 Pa, and the exhaust capacity is 0.25-500 m3/h.

1. Water Ring Vacuum Pumps  Types and Characteristics

Water ring pumps can be divided into the following types according to their different structures:

(1) Single-stage single-acting water ring pump: single-stage refers to only one impeller, single-acting refers to the impeller every rotating cycle, suction and exhaust once. This kind of pump has higher limit vacuum, but lower pumping speed and efficiency.

(2) Single-stage double-acting water ring pump: single-stage refers to only one impeller, double-acting refers to the impeller every rotation of a week, suction, exhaust twice. Under the same pumping speed, the size and weight of double-acting water-ring pump are much smaller than that of single-acting water-ring pump. Because the working chamber is symmetrically distributed on both sides of the pump hub, the load acting on the rotor is improved. This kind of pump has higher pumping speed and efficiency, but lower limit vacuum.

(3) Double-stage water ring pumps: Most of the double-stage water ring pumps are single-acting pumps in series. Essentially, the impellers of two single-stage single-acting water ring pumps are joined together by a common spindle. Its main feature is that it still has a large pumping speed at a higher vacuum, and its working condition is stable.

(4) Atmospheric Water Ring Pump: Atmospheric Water Ring Pump is actually a unit of air ejector series water ring pump. The air pump in series in front of the water ring pump is designed to improve the limit vacuum and expand the use of the pump.

H150-Rotary-Piston-Vacuum-Pump-Manufacturer

Best-China-Rotary-vane-piston-vacuum-pump

High-Quality-Custom-Piston-Vacuum-Pump

How to use vacuum pump oil more effectively?

Vacuum pumps are devices that improve, create, and maintain vacuum in a closed space in a variety of ways. According to the working principle of the vacuum pump, the vacuum pump can basically be divided into two types, namely, a gas trap pump and a gas transfer pump. It is widely used in metallurgy, chemical, food, electronic coating and other industries. The correct use of vacuum pump oil is very important for the normal operation of the vacuum pump, how to use the vacuum pump oil more effectively.

Questions about the cleanliness of vacuum pump oil use and how to deal with it:

1. The window for loading oil must be clean. It is strictly forbidden to be exposed to sunlight and stored in the open air. It should be stored in a dark, dry and ventilated place with strict waterproofing and dust mixing.

2, the fueling appliance must have special equipment, should not be a container filled with other oils or solvents; pump.

3. When taking oil or loading oil, the light rain around the lid must be removed to prevent the impurities from mixing into the oil and causing the pump to wear.

4. When changing oil, drain the oil used in the pump body, pour the new oil into the pump shaft slowly, clean the pump chamber and drain the oil, repeat the cleaning several times, and then replace it with new oil after washing. .

5. When mineral oil is exchanged with ester oil or other synthetic oil, the vacuum pump should be disassembled for thorough cleaning. All parts, including all parts, must be immersed in ester oil to prevent contamination.

6. When the vacuum pump is overhauled, the components of the pump must be cleaned with solvent or cleaning agent, and the parts must be dried.

factory-direct-sale-high-vacuum-oil-diffusion-pump

Vacuum-Pump-oil-for-ultra-high-vacuum-diffusion-pump

Vacuum-Diffusion-Pump-Oil-For-Metal-Diffusion-Pumps

Glass diffusion pump vacuum system

 A vacuum pump for vacuum is obtained. Vacuum pumps are classified into two types according to different working conditions: A vacuum pump capable of operating at atmospheric pressure is called a primary pump (such as a mechanical pump), and a vacuum pump for generating a preliminary vacuum, which needs to be operated under preliminary conditions, is called a secondary pump (glass). Diffusion pump), the secondary pump is used to further increase the vacuum and obtain a high vacuum.

       Vacuum section: 1 rough vacuum 760 ~ 10 Pa; 2 low vacuum 10 ~ 10 - 2 Pa; 3 medium vacuum 10 - 2 ~ 10 - 4 Pa; 4 high vacuum 10-4 ~ 10-7Pa; 5 ultra high vacuum 10 - 12 ~ 10 - 14 Pa; glass diffusion pump structure shown in Figure 1, the diffusion pump is a high vacuum pump, when the ultimate vacuum of the mechanical pump can not meet the requirements, usually a diffusion pump is added to obtain a high vacuum. This type of pump does not work from normal air pressure and can only operate at pressures below 1 Pa. Therefore, it must be used in series with the primary pump.

       There are many kinds of liquid oils for the diffusion pump. Currently, the diffusion pump oil of No. 3 (the saturated vapor pressure at 20 °C is 1.3×10-6 Pa) and the boiling point of 375 °C and No. 275 silicone oil (the saturated vapor pressure at 20 °C is 1.3). ×10- 8 Pa) The boiling point is 430 °C. Before the diffusion pump starts to work, the mechanical pump must be started to pump air. When the pre-vacuum is reached (about 1.3 Pa), the oil in the diffusion pump evaporator can be heated by the electric furnace. It can be observed in about 25 to 35 minutes. At this point, the diffusion pump oil begins to boil, and the oil vapor begins to eject toward each stage nozzle to form a jet.

When the silicone oil is heated to boiling at 430 ° C, a large amount of oil vapor is generated, and the steam is ejected from the nozzles at high speed through the conduit. At this time, since the gas from the pumped container continuously diffuses into the steam flow, it is called a diffusion pump. The jet is ejected to the lower umbrella cap. The pressure of this jet is stronger than that of the upper jet, and the gas molecules enter the next-stage jet. This level of pressure is greater than the upper jet, and the oil vapor is condensed by the condensate jacket. Flowing back along the tube wall through the return line to the evaporator, the gas carried underneath is pumped away by a mechanical pump at a rate of 4 liters per second, and the ultimate vacuum of the diffusion pump can be reached after 20 minutes. These working conditions are only easily observed through the glass, the process of diffusion, eruption and condensation, which is the origin of the name of the diffusion pump, which is invisible to these working state metal diffusion pumps.

high-vacuum-rotary-vane-vacuum-pump-for-plastic-forming

metal-oil-diffusion-vacuum-pump

oil-diffusion-vacuum-pump-for-vacuum-suction

factory-price-high-vacuum-oil-diffusion-pump

oil diffusion pump working principle and structure

The working principle of the oil diffusion pump is similar to that of the steam jet pump. The high-speed steam jet carries the gas to achieve the purpose of pumping, so it has similar characteristics as the water jet pump. The difference is that the diffusion pump works in a high vacuum area, and its working pressure ranges from 10-2 to 10-6 pa. Widely used in industrial sectors such as electronics, chemicals, metallurgy, machinery, petroleum and atomic energy.

When the oil vapor is ejected from the umbrella nozzle (such as the class I nozzle) at supersonic speed, the speed gradually increases, the pressure and density gradually decrease, and the pumped gas A on the jet diffuses into the steam jet due to the density difference. And is carried by the jet to the water-cooled pump wall B. At B, most of the working steam is condensed into oil droplets flowing back to the oil pan along the pump wall for recycling, and the pumped gas is accumulated and compressed at B, and finally The lower jet is carried away to achieve progressive compression and is finally pumped away by the foreline pump.

high-temperature-Oil-Diffusion-Pump

hot-sale-high-quality-oil-Diffusion-Pump

oil-diffusion-pump-made-in-China

Dry Screw Vacuum Pump Leak Detection

Dry Screw vacuum pump is often used in industrial production process of pumping equipment, once air leakage occurs in the use process, it will not only affect the efficiency of equipment but also affect the results of work, so regular leakage detection is indispensable.

1. First of all, it is necessary to know whether the screw vacuum pump can withstand positive pressure and how much pressure it can withstand, so as to decide whether it can adopt the air leak test method and how much pressure it can fill.

2. Before checking the leakage of screw vacuum pump, we should carefully and conscientiously clean the weld seam and remove welding slag, oil pollution and dust.

3. The light in the leak detection site should be sufficient, the background in the sink should be dark, the water should be clear, and there should be no vapor on the water surface.

4. The screw vacuum pump must be inflated first and then put into the water. Otherwise, if there is a big leak, the water may enter the container and the small hole may be blocked by the water. Before releasing into the water, the audiometry should be used to check whether there is a big leak. After eliminating the big leak, the leak can be put into the water again. Otherwise, the detection of small leaks will be affected.

5. When a screw vacuum pump is just put into water, bubbles may appear on the surface of the tested parts. If these bubbles are wiped out or the bubbles do not appear after puncturing, it can be judged that there is no leakage in the original place where the bubbles were produced. If bubbles occur regularly and continuously, there are leaks where bubbles are generated.

6. The screw vacuum pump should be stable in the water, wait for the water surface to calm down and then observe.

7. Vacuum pump should be as close as possible to the water surface.

8. Mark leaks in time. When there is a big leak, the small leak should be checked after repairing.

The screw vacuum pump should be cleaned carefully before leak detection in the place where the light is better. It should not leave any suspicious place, so as to ensure that the equipment is always in a vacuum state and provide convenience for our production.

Dry-Screw-Vacuum-Pump-fault-solution

vacuum-pump-overheating-effective-solution

Three-Solutions-to-Overload-of-Roots-Vacuum-Pump