High temperature magnetic pump

Magnetic high temperature pump series small high temperature and high pressure pump 350 ℃, mold temperature machine pump, heat transfer oil pump, hot water pump {100 ℃ - 180 ℃}, low temperature pump - 100 ℃, solar energy pump, is a real substitute for imported high temperature pump series, with reliable quality and favorable price. It can be equipped with explosion-proof motor and special pump for heat transfer oil. It belongs to high-temperature magnetic pump, with no shaft seal, no leakage and long service life. Roller heating heat transfer oil pump, oil heater special pump, film mold temperature machine heat transfer oil special pump, transport corrosive or other special performance liquid, practical in petroleum, chemical, rubber, plastic, pharmaceutical and other fields. General liquid water temperature 0 ℃ ~ 180 ℃, high temperature heat transfer oil - 100 ℃ - + 350 ℃ 

Small power high temperature and high pressure leak free pump 350 ℃, mold temperature machine pump, heat transfer oil pump, hot water pump {100 ℃ - 180 ℃}, low temperature pump - 100 ℃, solar energy pump, is a real substitute for imported high temperature pump series, with reliable quality and favorable price. It can be equipped with explosion-proof motor and special pump for heat transfer oil. It belongs to high-temperature magnetic pump, with no shaft seal, no leakage and long service life. Special pump for heating heat conducting oil, special pump for oil heater, special pump for heat conducting oil for film mould temperature machine. They are used for transporting corrosive or other special properties of liquid. They are applicable to petroleum, chemical, rubber, plastic, pharmaceutical and other fields.

Air Roots Blower For Wastewater Treatment

Stainless Steel Roots Blower Price

Air Roots Blower In Aeration Tank 

Installation of self suction magnetic pump

The self suction magnetic pump adopts external mixing axial return water pump body structure. The pump body is composed of suction chamber, liquid storage chamber, volute, reflux hole, gas-liquid separation chamber, etc. After the self-priming magnetic pump is started, under the action of centrifugal force, the remaining liquid in the suction chamber and the air in the liquid inlet pipeline are stirred into a gas-water mixture by the impeller. The mixture enters the gas-liquid separation chamber through the volute. As the speed slows down, the air is discharged from the liquid outlet of the pump, and the liquid returns to the pump through the backwater hole. After several cycles, the air in the liquid inlet pipe is exhausted A certain vacuum degree is formed in the pump to achieve self-priming effect. The self-priming magnetic pump replaces the dynamic seal with the static seal, which makes the flow passage parts of the pump in a completely sealed state. The self-priming magnetic pump thoroughly solves the problems of running, emitting, dripping and leaking which cannot be avoided by other mechanical seals.

Self priming magnetic pump is a new product which has been successfully researched and tested by engineers and technicians of our company on the basis of absorbing foreign new technology according to the requirements of users. The self-priming magnetic pump adopts magnetic transmission principle and hybrid structure. Compared with ordinary centrifugal pump, it can reflect self-priming, facilitate remote centralized control and implement automatic operation. Therefore, it is widely used, especially for those cases where the installation position of the pump is higher than the liquid level, the self-priming magnetic pump is the first choice.

The self suction magnetic pump has the characteristics of full sealing, no leakage and corrosion resistance. The self-priming magnetic pump is self-priming. It does not need bottom valve and irrigation water. The self-priming height is 4 meters. It can be widely used in petroleum, chemical, pharmaceutical, electroplating, printing and dyeing, food, scientific research and other units. It can pump acid, alkali, oil, rare precious liquid, toxic liquid, volatile liquid, as well as circulating water equipment, especially for the pumping of leakage, flammable and explosive liquid.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces 

Flow and head of circulating water pump

The flow determination of circulating water pump should follow the following principles

(1) When circulating water by-pass filtration is adopted, the maximum hourly water consumption plus by-pass filtration shall be the maximum hourly design water consumption of circulating water pump

(2) When circulating return water bypass filtration is adopted, the maximum hourly water consumption shall be the maximum hourly design water consumption of circulating water pump. Determine the head of circulating water pump. The total head of circulating water pump shall include the sum of the following values.

(1) The elevation difference between the allowable lowest water level elevation (or lowest water pressure elevation) at the water pump suction pipe and the terrain elevation at the most unfavorable point in the system. (Note: the most unfavorable point refers to the highest total head of water pump calculated according to this point)

(2) The required working water pressure at the most unfavorable point.

(3) Head loss of water pump suction and discharge pipes (including system pipes).

(4) The sum of head loss plus suction height and steam partial pressure of suction pipe shall be less than the allowable suction height provided by pump sample.

Water Ring Vacuum Pump For Vacuum Refining

Water Ring Vacuum Pump In Vacuum Negative Pressure System

Water Ring Pump

How to deal with the pollution of vacuum system?

Low vacuum devices, such as vacuum conveying, vacuum impregnation, vacuum filtration, vacuum monotony, vacuum degassing (steel disposal) and so on, plead for low vacuum pumping units with high working pressure and large exhaust capacity. Reciprocating vacuum pumps, oil-sealed vacuum pumps, steam radiation pumps, water ring pumps and Roots are commonly used in the main pumps of such low vacuum pumping units. Pumps, etc. The low vacuum pumping units used should also be equipped with necessary dust collectors, monotonous tanks and other components according to the cleanliness, humidity or other special requests of the pumped gas.

Water vapor condenses into droplets in the process of contraction and mixes with the pump to form suspension. It not only reduces the vacuum, but also rusts the pump chamber and rotor, destroys the sealing surface and lowers the limit vacuum of the pump. Therefore, it is very important to prevent water vapor from polluting mechanical pumps. The preventive measures include:

(1) Oil-sealed mechanical pumps with air-ballast devices are selected;

(2) Oil separators, centrifugal separators or oil-water separators stop the treatment of mechanical pump oil mixed with water, and the treated oil is then flowed into the pump for use;

(3) Use monotonous agents with strong water absorption;

(4) The use of liquid nitrogen cold trap can not only effectively absorb water vapor, but also prevent the mechanical pump oil from flowing back to the high vacuum chamber.

Pollution and Prevention of Oil Diffusion Pump Vacuum System

The vacuum system of oil diffusion pump is the most widely used vacuum system. Its vacuum degree is 1.3 *10-3~1.3 *10-5 Pa. After long-term use, the common shortcomings of various vacuum devices consisting of oil diffusion pump vacuum system are that the vacuum can not be pumped up, or the vacuum can not be pumped up to the original limit vacuum level. It is related to the oil vapor pollution of the vacuum chamber wall and the pollution of various pollutants in the vacuum process.

(1) Clean the vacuum chamber regularly;

(2) Stop cleaning oil seal mechanical vacuum pump and oil metal diffusion pump regularly.

Rotary-Vane-Vacuum-Pump-for-Vacuum-Metalizing-Plant

Belts-Driven-Liquid-Water-Ring-Vacuum-Pump-and-Compressor

2be-industrial-water-circulating-vacuum-pump

Basic Requirements for Vacuum Systems

Vacuum system refers to a device which can meet certain vacuum requirements by connecting vacuum pumps, vacuum gauges and various parts through pipes in an appropriate way. What are the basic requirements of vacuum system?

1. Get the required limit vacuum and working vacuum in the pumped device or working chamber. Limit vacuum is the vacuum degree that the device achieves without leakage and discharge, and working vacuum is the vacuum degree that can be maintained when the device is vacuum treated. A large amount of gas is emitted during vacuum treatment, and the working vacuum will be significantly lower than the limit vacuum. Limit vacuum degree and working vacuum degree have their own importance. They affect the quality of devices from different aspects.

2. The time required to obtain a working vacuum. The time depends on the pumping speed of the vacuum system. Increasing pumping speed can shorten this time. Large studios clearly require large pumping speeds. Sometimes the studio is small, but because of the serious leakage, the vacuum system also needs a large pumping speed, otherwise a large amount of leakage will greatly reduce the vacuum, making the system unable to work.

3. Suitable residual gas composition in the extracted device or working room. Practice has proved that it is not enough to simply improve and ensure the limit vacuum and working vacuum, and there should be certain requirements for residual gas composition. For example, in order to maintain the sensitivity reduction within one year life of vacuum camera devices, the oxygen content of residual gases in the devices should not be higher than 10-2 Pa high-voltage vacuum switch tube, and hydrocarbon molecules should not be included. The residual gas composition of the vacuum system, if there is no other gas source in the system, mainly depends on the characteristics of the pump.

4. In addition, the vacuum system must be simple in structure, reliable in performance, convenient in operation and maintenance, and inexpensive in price. To meet these requirements, comprehensive consideration must be given to the selection of pumps, the determination and layout of pipe sizes, and the assembly process. These basic requirements are often interrelated. For example, because the vacuum system always has the phenomenon of micro leakage, the pump with high pumping speed can obtain better working vacuum than the pump with low pumping speed, but the large pump is expensive, consumes more water and electricity, so there is a problem of reasonable selection. Miniature vacuum pumps are suitable for instruments and small vacuum systems. They are low cost, high efficiency and low noise. It is inappropriate for some users to choose industrial vacuum pumps with large flow rate.

5. Automation requirements. With the development of computer technology, the automation requirement of vacuum system for users is also increasing. For the vacuum system, the automatic control mainly regulates the flow rate and vacuum degree of the vacuum pump. Vacuum degree is often controlled by adjusting the flow rate of vacuum pump, installing throttle valve and relief valve. It is better to directly adjust the rotational speed of the vacuum pump to reduce energy loss and generate additional noise by throttling.

Vacuum-Pump-for-Vacuum-Transportation

Roots-water-ring-vacuum-unit-in-rice-bran-oil-physical-refining

Rotary-Vacuum-Pump-in-Refrigeration-System

Water Ring Vacuum Pump Unit Advantages

It is more advantageous to choose water ring pump as the front pump for water ring vacuum unit, which is made up of water ring vacuum pump in series as the front pump, and the vacuum unit is mainly pumped by pump. It overcomes the shortcomings of limit pressure difference and low pumping rate under a certain pressure when a single water ring pump is used. At the same time, it preserves the advantages of rapid operation of the pump and larger pumping rate.

Especially, it can suit to extract a large amount of condensable steam, especially when the capacity of gas-ballast oil-seal mechanical vacuum pump to remove condensable steam is not enough, or the solvent used can deteriorate the performance of the pump oil, or when oil pollution is not allowed in the vacuum system.

When equipped with explosion-proof motors and electrical appliances, the vacuum unit can also extract flammable and explosive gases under the corresponding safety rules. Therefore, Pump-Water ring pump unit is widely used in vacuum distillation, vacuum evaporation, dehydration and crystallization in chemical industry; freeze-drying in food industry; vacuum drying in pharmaceutical industry; polyester chips in textile industry; high-altitude simulation test and so on. Before using the vacuum unit, it is necessary to carefully check whether the fasteners in each part are loose or not. If there is loose, it must be corrected and tightened. Before starting, the tank must be filled with water, and the inlet valve of the pump must be opened. It is strictly forbidden to dehydrate, rotate and reverse, so as to prevent damage to the seal and pump.

Before the vacuum unit shuts down, it first empties or the vacuum degree falls below 0.092 Mpa, then shuts down in order to prevent the vacuum degree from being too high and suction easily damages the check valve. If the check valve fails, please open the check valve cover and remove impurities.) Steam-water series jet pump of vacuum unit, first opens and then turns on steam, then shuts down to prevent damage to the water jet pump. When installing steam pipeline, make sure that water can not accumulate in the pipeline, and keep the level, otherwise the vacuum will be affected. The excessive temperature of circulating water in the pool will affect the exhaust capacity and vacuum degree. It is necessary to replace or replenish water in time.

Single-Stage-Vane-Vacuum-Pump

Stainless-Steel-Water-Liquid-Ring-Compressor

Direct-Water-Ring-Vacuum-Pump

Double-Stage-Water-Ring-Vacuum-Pump

Small vacuum pump

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.

Vacuum-Pump-System-in-Iron-and-Steel-Industry

Vacuum-Pump-Technology-in-Natural-Gas-Treatment

Vacuum-pump-for-filter-equipment

Small Vacuum Pump of Application

What is a miniature vacuum pump? A miniature vacuum pump is also a miniature vacuum pump. Because of its small size, a miniature vacuum pump is usually called a miniature vacuum pump. Small vacuum pumps (i.e. micro vacuum pumps) refer to an instrument with one suction nozzle and one exhaust nozzle, which can continuously form vacuum or negative pressure at the inlet, a micro-positive pressure at the exhaust nozzle and a small working medium, mainly gas. Small vacuum pumps 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 and other vacuum operations. The application scope covers many fields such as scientific research, gas sampling, instrument, chemical analysis, medical and health care, medical and health, biological engineering, automatic control, environmental protection, water treatment and so on.

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 before starting or a pressure in its exhaust port, another technical parameter of the pump should be considered: a large start-up load at the intake port and a large start-up load at 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. Particular attention is paid to the fact that this parameter is measured under full load and uninterrupted operation, which is worse. 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.

Rotary-Piston-Pump-Used-for-Vacuum-Heat-Treatment

Single-Stage-Rotary-Vane-Piston-Water-Vacuum-Pump

Rotary-Piston-Vacuum-Drying-Pump

How to choose high quality dry screw vacuum pump?

Dry screw vacuum pump is a high-tech product, which is mainly used in high-purity vacuum process. It has high vacuum degree, can adapt to harsh conditions, has the ability to extract condensation and particulate gas, is especially suitable for clean environment, and is easy to do anti-corrosion treatment. It is especially suitable for electronic, chemical, biomedical, metal processing, food processing and other fields. Dry screw pump is a new type of vacuum pump. It is a renewal product of traditional vacuum pump. Because of its unique design principle, it can be oil-free and water-free. It can be used as corrosion-resistant coating. Excellent sealing design, besides the slightly more expensive price, will far exceed the performance of traditional vacuum pump in any aspect. It will have great market prospects in the future.

We can choose and judge the high quality dry screw vacuum pump through the following points:

1. Ultimate Vacuum: Of course, the lower the Ultimate Vacuum, the better. At present, domestic products are generally about 5 Pa, while imports are about 1 Pa.

2. Vibration and noise: Vibration must be small and noise must be 80 decibels small.

3. If it is used in corrosive environment, it is better to ask the manufacturer for a sample of the same coating and take it to the factory to test in the medium solution. Each manufacturer uses a different coating or coating ratio, and its performance will of course be quite different.

4. Sealability: This is also very important, but only from the manufacturer's recommendation to understand, the most direct or after access to the system through media testing is whether there is leakage.

The first two points determine the level of processing and design technology of vacuum pumps, which will affect the service life of pumps. The last two points will affect the service life of pumps, but also need experimental proof.

In order to purchase high-quality vacuum pumps, we should fully understand and prepare before purchase, so as to purchase suitable and satisfactory products. Because of the high cost of screw pump in general, it is suggested that we should choose more imported products when purchasing.

Oil-free-Vacuum-Pump-Application

What-is-a-dry-vacuum-pump

Liquid-Ring-Vacuum-Pump-in-Special-Ceramic-Manufacturing-Industry

How to adjust screw vacuum pump

Screw vacuum pump is a kind of suction and exhaust equipment which uses a pair of screw to make synchronous high-speed reverse rotation in the pump housing. After a period of time, the gap of the equipment gradually occurs, which will bring trouble to the equipment. Here we will teach you how to adjust it:

How to adjust the gap

1. Screw vacuum pumps are usually twin-screw, single-suction or double-suction type of gap adjustment is different.

2. If the new pump is not worn out:

Open the gear end of the pump drive, loosen the pressure sleeve of the gear, manually adjust the clearance between the spiral sleeves and tighten the gear again, so that the relative clearance between the screw sleeves can be adjusted well, but this is a technical work without certain experience, and each manufacturer is a little different, find the original manufacturer to adjust.

3. If the adjustment of the axial clearance is mainly to adjust the adjusting gasket of the positioning bearing, but it is not necessary to adjust after the general factory.

4. If the screw sleeve or pump sleeve is worn out, it is generally not easy to solve this problem by adjusting the clearance, only parts can be replaced.

2. Factors leading to equipment replacement

1. Oil pollution is the common cause of vacuum pump failure and unstable operation. If water or acid vapor flows through the pump and the oil is kept working for a period of time.

2. There will be serious corrosion and damage to the pump. The simple way to determine the need for oil change is to connect a vacuum meter to the pump to find out whether it can reach the rated vacuum.

3. In small pumps, the black oil does not necessarily indicate that the oil has been polluted.

4. If you smell the presence of solvents, you usually need to change oil. Light brown, dark oil also indicates the presence of water. Once you have doubts, you should change oil.

In order to reduce the gap of screw vacuum pump, we should start from the daily maintenance, regular cleaning and maintenance, if the equipment reaches the deadline, then replace it. Don't think it's a minor problem that doesn't matter. Often big problems come from minor problems.

Rotary-Vane-Vacuum-Pump-Ultimate-Vacuum-Instability-factors

Dry-Screw-Vacuum-Pump-in-Photovoltaic-Module-Laminating-Technology

rotary-vane-vacuum-pump-packaging-technology

Vacuum-Pump-System-in-Vacuum-Drying

High Vacuum Pumping Unit

Compared with the low vacuum unit, the high vacuum unit operates in the molecular flow state, which is characterized by low working pressure (10-2-10-6 pa), minimum exhaust and high pumping speed. The main pumps of the unit are usually diffusion pumps, diffusion booster pumps, molecular pumps, titanium sublimation pumps, cryogenic condensation pumps and so on. These pumps can not work directly on the atmosphere. Therefore, pre-pumps and front-stage pumps need to be equipped. Some high vacuum pumping units of diffusion pumps are equipped with front-stage maintenance pumps or gas storage masts to prevent pressure fluctuations and improve the performance of the unit.

(1) Pre-pumping. Pre-pumping (rough pumping) is mainly used to extract a large number of gases from the vacuum chamber, so that the gas pressure in the vacuum chamber can be reduced from atmospheric pressure to the vacuum degree when the main pump can start working. Therefore, the pressure of the pre-pumping is required to be less than the starting working pressure of the main pump. The pumping speed of the pre-pumping unit is determined by the rough pumping time. In order to improve the utilization rate of the vacuum unit, the pre-pumping unit is required to achieve a higher pumping speed. It can also be used as a front-stage pump. Vacuum valves are used to separate and switch between the two different functions.

(2) Maintenance pump. Due to the long start-up time of diffusion pump and oil booster pump, when loading and unloading in the vacuum chamber, the main pump is often closed in order to shorten the working cycle, so that the main pump is still in working state. Because the valve always has a very small amount of air leakage and surface bleeding, after a certain period of time, the pressure in the main pump chamber increases, which exceeds the maximum allowable pressure of the pump working yeast and causes the oxidation of the pump oil vapor. In order to solve this problem, one way is to use the front pump to continue pumping out the gas in the main pump, but at this time the gas discharged from the main pump is very small, there is a large horse cart of the front pump, which wastes energy. For this reason, another method can be adopted to stop the work of the front pump, close the valve of the front pipeline, and install a maintenance pump or gas storage inlay at the outlet of the main pump, so as to ensure that both the gas in the main pump can be discharged and the energy consumption can be saved. Gas storage tanks can not be made very different, they can only be used in small vacuum units with diffusion pumps as the main pumps, while maintenance pumps can be used in vacuum units with large main pumps.

(3) Gas storage tank. Small diffusion pump high vacuum pumping units are usually equipped with gas storage tanks, which are set between the diffusion pump and the front pump to store the gas discharged by the diffusion pump.

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