Roots vacuum pump operation

Roots vacuum pump operation and maintenance problems

1.Start the Roots vacuum pump and prohibit the outlet overpressure during the operation of the pump. If the outlet is over-pressurized when the pump is started, the light motor will trip and the pump will not start. The heavy one may damage the equipment; during the operation, the outlet is over-pressurized, the load of the pump increases, and the motor trips in severe cases.

2.Start or switch the Roots pump when the vacuum is at a minimum. That is, when the two towers are switched and evacuated, the Roots pump is started or switched. At this time, the pump inlet pressure is the highest, the pump outlet pressure is close to the pump, and the starting load is minimum. In an emergency, the pump should be prevented from starting and switching at a high vacuum.

3.When starting, close the inlet valve and open the inlet valve quickly after starting. According to the design requirements of the Roots vacuum pump, the pump inlet and outlet valves need to be fully opened before the pump is opened. However, in actual operation, it is difficult to ensure the tightness of the outlet check valve. If the inlet and outlet valves are fully opened, the pump will be reversed. At this time, the pump is started. It can't start because of the large starting load. According to the actual situation, the pump outlet valve is fully opened, and the inlet valve is slightly opened to ensure that the pump does not reverse. After starting the motor, the inlet valve is quickly opened.Rotary Vane Vacuum Pump

4.According to the Roots vacuum pump body temperature and outlet temperature to determine the operating state of the pump. Because the noise of the Roots pump is large, the sound of the pump is light and heavy as the load changes. It is difficult to judge the operation of the equipment from the sound during the inspection. Judging the running condition of the equipment mainly depends on the temperature of the pump body and the change of the temperature of the first and second outlets. The temperature of the pump body is more important because the outlet temperature reflects the temperature slower than the pump body. Once the pump outlet temperature rises, the pump body temperature rises faster. It may be too late to process the pump.Molecular Vacuum Pump Price

Piston Vacuum Pump overhaul

For the inspection of the piston vacuum pump, it is generally necessary to completely disassemble the pump, comprehensively check, and measure the gap between the slide valve and the pump body (normal clearance is 0.04~0.12mm); check the slide valve and guide pump eccentric wheel in the pump Whether there are cracks on the surface, cracks on the surface, and immediate replacement; all the seals in the pump are replaced; in the dynamic operation of the pump, the vibration tester can be applied to test the vibration of the pump every week. According to the measured data, It can preliminarily determine the wear condition of bearings, slide valves and other components. When the bearing movement accuracy is reduced, replace it to avoid the impact and friction between the slide valve and the pump chamber due to the wear of the bearing. A vacuum gauge is applied to the repaired mechanical pump to perform an ultimate pressure test to determine the performance and repair effect of the pump. For old pumps that have been used for a long time, the gap of the pump is greater than 0.1mm and less than 0.2mm. The ultimate vacuum requirement is not very demanding. Vacuum pump oil with a kinematic viscosity of 150mm2/s can also be used to meet the normal operation of the pump.

Due to the wear of the pump chamber, the pump with a gap between the spool and the pump chamber greater than 0.2mm needs to cooperate with the manufacturer of the pump. According to the wear condition of the pump chamber, the spool valve, eccentric wheel and guide rail are specially made to make The pump cavity maintains a normal clearance; if the pump cavity is worn and severely scratched, the pumping time and the ultimate pressure cannot meet the process requirements. The repair spare parts cost is close to about half of the new pump price, and the maintenance value has been lost. The new spool valve should be replaced. Vacuum pump.Roots-vacuum-pump-working-principle

water ring vacuum pump advantages

The advantage is to evaluate one point of a thing or something. Everyone and everything has its own advantages. The difference in merits makes the difference between people and friends. It also causes the machine to be used by more people. . Now, the use of water ring vacuum pumps is quite extensive, so what advantages does it have?

1. The water ring vacuum pump has a coaxial direct connection design, which saves space and is easy to install.

2. All imported mechanical seals are used as standard equipment.

3, all use Y2 series motor, protection grade IP54, IP55.

4. All bearings are imported NTN or NSK.dry-screw-vacuum-pump-for-medical-packaging

5. The water ring vacuum pump is equipped with a cavitation protection tube interface. If it works under the limit pressure, open the cavitation protection tube interface (or connect with the separator) to eliminate the cavitation sound when the suction effect is maximized. And protect the pump.

6. The aluminum bronze impeller has high strength, durability and improved corrosion resistance of the vacuum pump. If the flow parts are made of stainless steel, they can work in more demanding environments.

7. The unique flexible exhaust port design does not produce over-compression, ensuring that the water ring vacuum pump is the most efficient in its performance range.

The advantages of the water ring vacuum pump are diverse, and because of its irreplaceable advantages, its market is more extensive, and the manufacturer's sales speed is faster. Of course, the premise is that we must ensure that the quality of the products is absolutely clear.liquid-ring-vacuum-pump-material

Roots vacuum pump operation

Roots vacuum pump units are used in metallurgy, petrochemical, paper, food, electronics, etc. The application range of Roots vacuum pumps is extremely wide. Many users are equipped with one or several spares, and some are long-term projects. If it does not work, the purchased vacuum product is temporarily placed. For this situation, there is a very important problem to be paid attention to. It is also a standard to ensure the life of the Roots vacuum pump, that is, the equipment that has been idle for a long time should discharge the cooling water in the pump chamber in time. Empty, it has a certain protective effect on the pump itself.

The actual production of the Roots vacuum pump is carried out through various processes. While strengthening the quality of the blank, this part of the deep processing is also strictly carried out. For the emergence of waste products, the management system that contributes to production should be done in a timely manner. In the case of order production, the waste products are effectively processed, and the working hours quota must be controlled. On the basis of doing these basic work, it is necessary to timely respond to the needs of the market and strengthen the optimization of the processing technology of the products.Air Cooled Roots Vacuum Pump

The application strength of Roots vacuum pump has become an important condition for promoting the development of enterprise productivity. Its application has different application capabilities in different industries, but the same point is that it cannot be used as a single pump and can only be assembled with other equipment. The use of the unit type products plays the foundation of mutual strength. Through the application performance of the equipment, it can effectively achieve higher performance strength for the use of other equipment and improve the application effect of the products.Double Stages Water Ring Vacuum Pumps 

Vacuum pump oil

A screw vacuum pump is a device that uses various methods to improve, create, and maintain a vacuum in an enclosed space. According to the working principle of vacuum 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 screw vacuum pump.

1. The window for oil loading must be clean and clean. It is strictly prohibited to be exposed to sunlight and stored in the open air. It should be stored in a dark, dry and ventilated place, and it should be mixed with water and dust.

2. The fueling appliance must be special equipment and should not be a container filled with other oils or solvents.turbo-molecular-pump-structure

3. When taking oil or loading oil, the impurities 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 and components must be immersed in the ester oil to prevent contamination.

6. When the screw vacuum pump is overhauled, the components of the pump must be cleaned with solvent or cleaning agent, and the parts must be dried.
Two-stage-rotary-vane-vacuum-pump

Vacuum pump operation precautions

vacuum pump should pay attention to the following when it is used:

First, check the oil level, and it is advisable to fill the oil to the center of the oil mark when the pump is stopped. Too low to the exhaust valve can not act as an oil seal, affecting the degree of vacuum. Too high may cause fuel injection when the atmosphere is started. When operating, the oil level is raised, which is normal. Use a clean vacuum pump oil of the specified grade and add it from the filler hole. After refueling, the screw plug should be screwed on. The oil should be filtered to prevent debris from entering and clogging the oil holes.

Second, the pump can be started once in the atmosphere or under any vacuum. If the pump port is connected to a solenoid valve, it should be operated simultaneously with the pump.

Third, when the ambient temperature is too high, the temperature of the oil rises, the viscosity decreases, and the saturated vapor pressure increases, which causes the ultimate vacuum to decrease, especially the total pressure measured by a thermocouple. The ultimate vacuum can be improved by enhancing ventilation or improving pump performance.

Fourth, check the ultimate vacuum of the pump is based on the compressed mercury vacuum gauge. If the pre-extraction check is completed, the pump temperature will be stable, the pump port and the meter will be directly connected, and the ultimate vacuum will be reached within 30 minutes of operation. The value measured by the total pressure gauge is related to the pump oil and the vacuum gauge and the regulation error. Sometimes the error can be very large and can only be used as a reference.piston-vacuum-pump-process

Fifth, if the relative humidity is high, or the pumped gas contains more condensable steam, after opening the pumped container, the gas ballast valve should be opened, and the gas ballast valve should be closed after 20 to 40 minutes of operation. Before stopping the pump, the open air valve can be unloaded for 30 minutes to extend the life of the pump oil.

Sixth, oil selection: the viscosity of the pump oil affects the starting power and the ultimate vacuum of the pump. When the viscosity is high, the vacuum is favorable, and the starting power is larger. The saturated vapor pressure of the oil at the pump temperature will affect the ultimate pressure of the pump. The lower the better. The viscosity of high-speed vacuum pump oil and 3# diffusion pump oil is larger than that of No. 1 vacuum pump oil, and the saturated vapor pressure is lower than that of No. 1 vacuum pump oil, but the price of 3# diffusion pump oil is higher. The specific oil selected can be selected according to the above description combined with the specific use requirements.what-is-roots-vacuum-pump

Oil diffusion vacuum pump principle

Oil diffusion pump is a vacuum pump using low pressure, high speed and directional flow of oil vapor jet. The limit vacuum of this pump is 10-4-10-5 Pa, the working pressure range is 10-1-10-4 Pa, the pumping speed range is several hundred thousand liters/sec.
Oil diffusion pump is the main equipment to obtain high vacuum. It is widely used in vacuum smelting, vacuum coating, space simulation test and some vacuum systems insensitive to oil pollution. The oil diffusion pump is mainly composed of pump body, diffusion nozzle, steam conduit, oil pan, heater, diffuser, cooling system and jet nozzle.

When the oil diffusion pump is pre pumped to a vacuum of less than 1 pa, the oil pan can start heating. When boiling, the nozzle ejects a high-speed steam stream, and the heat-moving gas molecules diffuse into the steam stream, colliding with the directionally moving oil vapor molecules. The gas molecule therefore gains momentum and generates directional flow that is the same direction as the movement of oil vapor molecules. At the front stage, the oil vapor is condensed and the gas molecules are released, which is pumped by the front stage pump to achieve the purpose of pumping gas.

The vapor pressure of the pump directly affects the vacuum performance of the pump. However, any pump oil used by the oil diffusion pump is a mixture of different components with different vapor pressure. Therefore, in order to improve the pumping and vacuum performance of the oil diffusion pump, the pump itself has to fractionate and purify the pump oil. The purpose of fractionation is to keep the oil of high vapor pressure components from entering the high vacuum working nozzle (the nozzle at the high vacuum end); the purpose of purification is to make the oil of high vapor pressure components be continuously removed by the front pump during the working process, so that the oil gradually tends to be pure.

Rotary Vane Vacuum Pump

Vacuum pump unit functional structure

Different vacuum systems require different degrees of vacuum. Therefore, it often needs to be completed by a set of vacuum pumps. That is, by working in series with vacuum pumps in different pressure ranges, the vacuum pump on the high vacuum side can reach the vacuum required by the system, while the vacuum pump on the low vacuum side is directly exhausted. Obviously, a relatively simple vacuum pump unit is a vacuum pump with direct discharge. But a high vacuum system usually needs three units, and a medium vacuum usually requires two units. A high vacuum pump and a low vacuum pump are difficult to form an effective high vacuum pump unit. But if a middle vacuum pump is connected between the high and low vacuum pumps, it can play the role of connecting the top and bottom, continuous flow, and each pump can work in the best state.

Vacuum pump is to pump out the gas in the vacuum vessel, but often the pump's air outlet can not be directly connected with the pumped vessel. Because of the technical needs or to reduce the pollution degree of the vacuum pump unit with oil vapor pollution, it is necessary to connect with the pumped vessel through the cold trap, valve, pipeline. The pipe diameter of vacuum pump unit is large, the resistance loss will be small under the condition of the same flow rate and small liquid velocity; if the pipe diameter is small, the resistance loss will be aggravated. Therefore, the intake pipe of vacuum pump unit should be equipped with a valve, which is used to regulate the amount of water intake, the amount of water intake has an impact on the degree of vacuum. When regulating the amount of water intake, the valve is controlled by checking the pointer of the vacuum meter.

The material selection and sealing of the pipes and valves above the inlet of the main pump of the vacuum pump unit should be especially careful. Stainless steel and metal sealing structure and sealing materials are generally used.Vacuum-unit-introduction

Roots vacuum pump application performance

In the process of expanding the advantages of Roots Vacuum Pump in the development of its practical ability, it is necessary to combine the overall driving force of its product performance, to expand the continuous promotion of its product practical advantage level, to enhance the application of its products and the exertion of its superior ability, so as to open up the development of all aspects of the application ability, and to fully accelerate the development of the practical performance of the products. With the pioneering ability of the overall superiority, highlight the continuous improvement of its product performance, so as to enhance the pioneering performance of its quality strength with the overall development of the application ability.

From the perspective of the application strength of Roots vacuum pump, it is necessary to further accelerate the embodiment of its quality strength with reliable product practicability, improve the overall utilization and other advantages, expand the overall utilization and quality strength, and further develop the equipment application strength through the continuous improvement of its application performance. The overall embodiment, from the whole process of the development of quality and practical ability, strongly reflects the practical ability of the product to play, so that its advantages in the use of the process, to speed up the embodiment of its quality and practical performance.rotary-vane-vacuum-pump-at-best-price-in-india

The development of Roots Vacuum Pump's quality and practical ability enlarges the enhancement of its application strength in various aspects. With the continuous promotion of reliable product application and application strength, and with the development of overall application strength, the development of its product's practical ability should be strengthened, and the pioneering ability of its product's application ability should be fully enhanced.professional-vacuum-pump-manufacturers

Water ring pump stop pump operating procedures

Whether the water ring pump can be operated correctly is not only related to its service life, but also has an impact on its operation safety. In order to standardize the operation of the equipment during the operation process, the operation after pump stopping is also very important.

1. When stopping the pump, it is necessary to close the valve on the injection line of the pump body, close the sealing fluid valve, stop the motor, close the pump inlet and outlet valve, and make sure that the pump inlet and outlet valve is completely closed.

2. Isolate, empty and close the inlet valve of the pump, close the outlet valve of the pump, close the replenishment valve of the steam-water separator, and confirm that the inlet and outlet valve of the pump closes and opens the exhaust valve of the steam-water separator. Open the pump body vent valve and confirm that the medium in the pump is clean.

3. Delivery inspection confirms that the pump inlet and outlet valve is closed, confirms that the pump has been completely isolated from the system, confirms that the pump has been drained clean, the drain valve opens the vent valve, confirms that the motor is powered off. Get ready near the pump.

4, in addition, equipment and auxiliary systems need to be inspected and maintained.
(1) check whether the pump has abnormal vibration or murmurs.
(2) check whether the bearing temperature is normal.
(3) check whether the leakage of packing seal meets the requirements.
(4) check whether the cooling water is normal.
(5) check whether the static seal is leaking.
(6) if there is any impurity in the liquid in the pump, after the pump is stopped, open the bottom of the pump and empty the water.
(7) the equipment needs to be replaced after 2000 hours of operation.

Molecular Vacuum Pump Price

Single stage rotary vane vacuum pump

If the single-stage rotary vane vacuum pump in operation is not properly operated, there will often be faults, such as the vacuum degree of rotary vane vacuum pump drops, fuel injection, smoke, oil leakage at the oil seal, noise and so on, and the phenomenon of vacuum pump oil emulsification in the pump. In case of such a situation, we should not panic at first, and then eliminate it according to the fault after shutting down. Here are a few methods to eliminate trouble of single stage rotary vane vacuum pump.

1. Single-stage rotary vane vacuum pump <Smoke and fuel injection: refers to rotary vane vacuum pump in operation exhaust smoke or fuel injection.

1. Smoke, if the pump has just started to operate smoke phenomenon, belongs to normal, if smoke for a long time is abnormal. Solution: smoking indicates the repair of the pump's intake port, including pipes, valves and containers. After the leak is processed, the smoke will end. Vortex flowmeter.water-ring-pumps-are-used-in-the-oil-and-gas-industry

2. Fuel injection indicates that there are a lot of leakage points outside the intake port, and even the air inlet exposes the atmosphere. Solution: Seal the inlet of the pump to make the pump run, if there is no fuel injection, that there is a leak; exhaust valve damage, check whether the exhaust valve damage, replace the bad disc.Central-vacuum-system-for-fresh-food-packaging

Matters needing attention in Roots vacuum pump

The particularity of working environment and working intensity of Roots vacuum pump makes the product inspected frequently. Inspection is only a way to avoid problems, and the high efficiency is to master the matters needing attention in the use of the product. This can not only improve the performance of the product but also effectively avoid troubles caused by wrong operation. Several points for attention in the application of Roots vacuum pump are summarized.

1. Check the oil level regularly. If it does not meet the requirements, it must be adjusted to meet the requirements. When the roots pump operates, the oil level shall be the center of the oil standard.

2. The oil change period of Roots Vacuum Pump is decided by the user according to the actual use conditions and whether it can meet the performance requirements. General Xinluo pump, when clean and dry gas is removed, it is recommended to change the oil once every 100 hours or so.

3. Check the oil quality regularly and find that new oil should be replaced in time to ensure normal operation.

4. Generally speaking, the roots pump should be repaired after 2000 hours of operation to check the aging degree of the seals, check whether the exhaust valve discs are cracked, and clean up the dirt deposited on the valve discs and the exhaust valve seat. Cleaning parts of the roots pump cavity, such as rotor, rotary vane, spring, etc. Usually wash and dry with petrol. After cleaning the rubber parts, dry them with dry cloth. When cleaning and assembling, handle with care gently and carefully.

5. Roots pump adds bearing lubricating oil to the bearing body. The oil level should be observed at the center line of the oil mark, and the lubricating oil should be replaced or supplemented in time.oil-for-vacuum-pumps

6, check roots pump pipeline and whether there is loose joint. Turn the roots pump with your hands to see if the roots pump is flexible.

7. After reassembly, test run should be carried out. Generally, it must run empty for 2 hours and change oil twice, because there will be a certain amount of volatile substances in roots pump when cleaning, and then put into normal work after normal operation.dry-screw-vacuum-pump-in-pv-module-lamination-process-of-application

8. Start the motor, when the normal operation, open the outlet pressure gauge and inlet pressure gauge, as it shows the appropriate pressure, gradually open the gate valve, while checking the load of the motor.

9. Controlling the flow and head of Roots Vacuum Pump as far as possible in the range indicated on the sign to ensure that the roots pump operates at the most efficient point, so as to obtain good energy-saving effect. V

Rotary vane vacuum pump troubleshooting method

Rotary vane vacuum pump is suitable for the extraction of dry or containing a small amount of condensable vapor gas, not suitable for the extraction of excessive oxygen, explosive, corrosive, the vacuum pump oil plays a chemical role and contains a large number of solid particles gas. In the operation of rotary vane pump, if the operation is not correct, it will lead to some faults, serious will also lead to its stop operation. Next, let me introduce to you some of its common faults and troubleshooting methods:

1, this rotary chip vacuum pump oil grades are different from the original ones. Different brands of pump oil, due to different saturated vapor pressure, the result will be different.

Exclusive method: select the correct vacuum pump oil according to the product type.

2. The gap between components in rotary vane vacuum pump is larger. This is a long drawn out air containing dust in the body, causing the clearance between the rotary vane and the stator to increase.

Troubleshooting: check whether the gap is too large and replace the new parts.

3, the oil circuit in the pump is blocked or not smooth, and the pump chamber does not maintain a certain amount of oil.

Troubleshooting: check whether the oil circuit is open and add the same type of vacuum pump oil.

4, the temperature of the gas being pumped may be too high.

Troubleshooting: reduce the temperature of the gas being pumped, or add a corresponding heat exchanger on the rotary vane vacuum pump.

5, the water vapor and impurities in the gas are too high to cause the rotary vacuum pump to emulsify or discolor.

Elimination method: Pump out the vacuum pump oil, replace the same type of pump oil, and set up a filter to ensure that the steam and impurities in the pumped gas do not enter the pump.

Vacuum refrigeration of vacuum unit

Vacuum unit is made up of Roots vacuum pump and water ring vacuum pump. The vacuum degree of a single water ring pump is 3 300 Pa. If you want to achieve higher vacuum degree, you must equip Roots pump, which can also increase the pumping speed.

Vacuum unit in the use of vacuum pre-cooler when the vacuum and pumping speed requirements are relatively high, so the selection must be based on the actual situation proportioning. Vacuum unit is used as vacuum precooler in cooked meat processing to describe: cooked meat needs to be placed in a cubic reactor for 1/3 of the temperature of cooked meat is about 90 degrees Celsius, the temperature of cooked meat needs to be reduced to 20 degrees Celsius through the purpose of vacuum, the required time is less than or equal to 30 minutes, every 30 minutes in vacuum negative The evaporation of steam is 20kg under pressure.What-is-liquid-ring-vacuum-pump

Because of the high pressure resistance of the molecular booster pump, the former stage pump can easily be in a high flow state; while the molecular booster pump has a high suction pressure, which reduces the pre-pumping burden of the former stage pump. Molecular booster pump can work in 100-50Pa, the former pump from the atmosphere to this pressure, basically obey the pressure every time to reduce an order of magnitude, so the unit can have a high pumping efficiency. To simplify the high vacuum unit and cancel the roots pump is another advantage of the molecular booster pump.high-temperature-problem-of-vacuum-pump

Water ring vacuum pump model

Now the use of water-ring vacuum pump has been very common, manufacturers in order to meet the needs of different users, will produce a number of models of products, in order to let everyone be able to choose a truly suitable product for their own, the following detailed description of the water-ring vacuum pump model.

1. 2BV model water ring vacuum pump is mainly used to remove gas and water vapor, the suction pressure reaches 33 mbar absolute pressure (97% vacuum).roots-vacuum-pump-structure

2.2BE type is usually used to pump gas containing no solid particles, insoluble in water, no corrosive gas, can quickly form vacuum and pressure in a closed container.

3. The 2BV water-ring vacuum pump can be used to extract gas and wet steam, and the suction pressure reaches 33 mbar absolute pressure (97% vacuum degree).
liquid-ring-vacuum-pump-industry-application
4. SK type, used for pumping or pressurizing air and other gases, these gases require non-corrosive, insoluble in water, does not contain solid particles, thus in an airtight container, the formation of vacuum and pressure, to meet the requirements of the production process.

5. 2SK type, 2SK series water ring vacuum pump is equivalent to 2 series SK series vacuum pump in series.

rotary vane vacuum pump of summary

Rotary vane pump smoke and fuel injection: refers to rotary vane vacuum pump running in the exhaust port smoke or fuel injection.

1. Smoke, if the pump has just started to operate smoke phenomenon, belongs to normal, if smoke for a long time is abnormal. Solution: smoking indicates the repair of the pump's intake port, including pipes, valves and containers. After the leak is processed, the smoke will end. Vortex flowmeter.

2. Fuel injection indicates that there are a lot of leakage points outside the intake port, and even the air inlet exposes the atmosphere. Solution: Seal the inlet of the pump to make the pump run, if there is no fuel injection, that there is a leak; exhaust valve damage, check whether the exhaust valve damage, replace the bad disc.Roots blower

vacuum pump application

Vacuum pumps use mechanical, physical, chemical, physical and chemical methods such as container extraction, acquisition and maintenance of vacuum equipment. Vacuum pumps and other equipment (such as vacuum containers, vacuum valves, vacuum measuring instruments, connecting pipes, etc.) form a vacuum system, which is widely used in electronics, metallurgy, chemical industry, food, machinery, medicine, aerospace and other departments.

According to their works, they are basically divided into two types of traps: gas pumps and oil pumps.industrial-liquid-ring-vacuum-pump

Vacuum pumps include: liquid ring vacuum pump,reciprocating pump, rotary vane vacuum pump, rotary piston vacuum pump, dry vacuum pump, Roots vacuum pump, molecular vacuum pump, traction molecular pump, water jet pump, gas jet pump, steam jet pump, diffusion pump, etc.molecular-vacuum-pump-price

Roots vacuum pump unit in petroleum distillation

According to the performance and characteristics of Roots vacuum unit, the economic benefits obtained by replacing steam jet vacuum pump in petroleum vacuum distillation unit are summarized. It has many functions, but it is not very well known.

Almost all the vacuum distillation units in domestic refineries are used to use the traditional steam injection vacuum pump as the main means of evacuation. Although the steam injection vacuum pump is simple in structure, small in maintenance and reliable in operation, it consumes a lot of water vapor and cooling water, but the obtained vacuum degree is low, so that the crude oil can not be deep-dialed, and the oil recovery rate is low. In addition, because a large number of condensate water and oil vapor condensate liquid mixing, which is a waste of oil and serious environmental pollution. In other countries, the so-called "dry distillation" is used in the distillation unit of refineries. In addition to upgrading the original vacuum tower.

The roots vacuum pump unit mainly selects and redesigns the evacuation equipment. Back-cooled Roots vacuum pump is used as the main pumping pump in the United States to overcome the heating of Roots vacuum pump under high pressure. The front stage vacuum pump chooses two-stage water-ring vacuum pump to form the pumping unit, and also needs a cold source to maintain the long-term operation of the unit. Therefore, the design structure is more complex and the cost is more expensive.

Vacuum pump characteristics and scope of application

The vacuum suction port of the vacuum pump is equipped with a coarse filter with wire mesh. It can prevent solid particles from inhaling pump cavity. The oil separator is equipped with an exhaust transition device with high efficiency for separating oil and gas. When the pump stops, the suction valve built in the suction port isolates the pump from the pumped system and prevents oil from returning to the pumped system. The pump is cooled by air. All pumps of rotary vane vacuum pump are driven by direct coupling motor through flexible coupling.

Vacuum pump scope:

1. vacuum pump is suitable for vacuum pumping in closed system. Such as vacuum packaging, vacuum forming, vacuum suction.

2. Inlet pressure range: 100Pa-100000 Pa, beyond this range of work vacuum pump outlet will have oil mist. The working temperature of the rotary vane vacuum pump and the temperature of the inhalation gas should be between 5 ~40 C.

3. vacuum pump can not remove water or other liquids. It is not possible to remove explosive, flammable and corrosive gases.

4. Generally supplied motors are not explosion-proof. If explosion-proof or other special requirements are required, the motors must meet the relevant standards.

dry screw vacuum pump advantages

Dry screw vacuum pump is a suction and exhaust device which uses a pair of screw rods to rotate in the pump shell at high speed and reverse synchronously. The two screw rods are supported by bearing and installed in the pump shell after fine dynamic balance correction. There is a certain gap between the screw and the screw rod. Therefore, when the pump works, there is no friction between the screw rod and the pump runs smoothly. Low noise and no lubricating oil in working chamber.

Therefore, dry screw vacuum pump can remove a large amount of steam and a small amount of dust in the gas occasion, higher limit vacuum, lower power consumption, energy-saving, maintenance-free advantages.How-to-choose-vacuum-pump-oil

Dry screw pump is the upgrading product of traditional vacuum pump, and has great market prospect in the future.

Rotary vane vacuum pump working principle

Rotary vane vacuum pumps are mostly small and medium-sized vacuum pumps. Rotary vane vacuum pump has two kinds of single stage rotary vane vacuum pump and two stage vacuum pump. The so-called double stage rotary vane vacuum pump is to connect two single stage pumps in series. It is usually made in two stages to achieve higher vacuum.

The relationship between the pumping speed and the inlet pressure of the rotary vane vacuum pump is as follows: the pumping speed of the rotary vane vacuum pump should not be lower than 95%, 50% and 20% of the nominal pumping speed of the pump at the inlet pressure of 1333 3Pa, 1.33 Pa and 1.33 *10-1 (Pa).oil-diffusion-vacuum-pump-return-oil-how-to-maintain

When the rotary vane vacuum pump works, the exhausted gas is first entered into the high vacuum level through the suction cylinder. When the inhalation pressure is high, part of the gas is discharged by the exhaust valve 2, and the other part of the gas is discharged by the exhaust valve 1 through the low vacuum stage. When the suction gas pressure is low, although the high vacuum stage compression, but the exhaust valve 2 still can not open the exhaust, can only continue to compress through the low vacuum pole, exhaust valve 1 discharge, because the limit vacuum of the two-stage pump than single-stage pump.rotary-vane-vacuum-pump-gas-ball-valve

SK water ring vacuum pump works

We need to be prepared before we do anything, so is the case with SK water ring vacuum pumps. Before you use it, you need to be well prepared to get twice the result with half the effort.

1. Before we use it, we should check the rotation of the pump shaft of SK water ring vacuum pump to see if it is normal, whether it is stuck or not, and whether the position of the impeller is normal.

2, SK water ring vacuum pump cable and cable plug whether there is rupture, scratching and breaking phenomenon.piston-vacuum-pump

3. In operation, we should pay attention to the change of the pump voltage, which is generally controlled within the range of (+5%) rated voltage.

4. The position of SK water ring vacuum pump in water is very important. It should be selected as far as possible in places with abundant water, no silt and good water quality. Vertical suspension in water is not allowed to be placed horizontally, so as to avoid falling into the mud or blocking the inlet of the pump by suspended solids, resulting in a sharp decrease in water output and even no water can be pumped.

Before we use SK water ring vacuum pump, we must have an understanding of the whole, while we are in production, to the machine first operation, testing, so that we can ensure that the use of the process to reduce abnormal phenomena.

Vacuum pump manufacturer

Vacuum pump manufacturer's vacuum pump is a rotary variable volume air pump, vacuum pump must be equipped with a pre-pump, can be used in a wide range of pressure within a larger pump speed, gas containing dust and water vapor insensitive, widely used in metallurgy, chemical industry, food, electronic coating and other industries.

Vacuum pumps include dry screw vacuum pumps, water pumps, reciprocating pumps, slide valves, rotary vane pumps, Roots pumps and diffusion pumps. These pumps are very important for vacuum technology in the national economy.vacuum-system-improvement-of-vacuum-freezing-chamber

Over the years, with the sustained and rapid development of China's economy, the vacuum pump related downstream application industry maintained a rapid growth momentum, and the vacuum pump application field continues to expand together with other factors, China's vacuum pump industry to achieve sustained and stable development.Vacuum-system-in-alcohol-distillation-application

dry screw vacuum pump introduction

Dry screw vacuum pump is now a more popular product, and it is also a very high-tech products, today to introduce to you about the basic situation and principle of dry screw vacuum pump.

Dry screw vacuum pump is used to obtain vacuum environment equipment. Dry screw vacuum pump can obtain a high vacuum environment. At the same time, it can also work normally in some harsh environment. It can vacuum the air containing particulate matter and be used in electronics industry, chemical industry and biomedical field. Extensive.

What is the working principle of the dry screw vacuum pump? In fact, the dry screw vacuum pump is the use of a pair of screw equipment in the pump for high-speed synchronous reverse rotation movement, through this movement to exhaust and suction, the rotation of the two screw have been precisely calculated, corrected, through the support of bearings, to ensure that there will be no friction between the components during work. It can run smoothly, at the same time, it also achieves low noise and no need of lubricating oil.dry-screw-pump-and-claw-pump-of-principle

Based on the principle of dry screw vacuum, it has the following advantages: low noise, no need to use lubricant, low power consumption, almost no maintenance, high vacuum limit, can work in the environment containing a large amount of steam and a small amount of dust.rotary-vane-vacuum-pump-maintenance

Roots vacuum pump of selection method

Roots vacuum pump equipment is an important basis for production, plays a core role, the selection of appropriate equipment is the basis for normal operation of production operations, if the equipment is not suitable, not only can not play its original function, affecting the equipment itself, and even for the production environment there will be hidden dangers. So do you know how to type?

1. The limit pressure of Roots vacuum pump equipment should satisfy the working pressure of the process. Usually, the limit pressure of the pump is about an order of magnitude lower than the process requirement.

2. Roots vacuum pump equipment has a certain range of working pressure, therefore, the pump should be selected within this range of working point, and can not allow it to work for a long time beyond the allowable working pressure.

3, when choosing, we should first understand whether roots vacuum pumps have requirements for oil pollution. If the equipment strictly requires no oil, should choose a variety of non-oil pumps; if the requirements are not strict, you can choose to have oil pumps, coupled with some anti-oil pollution measures, can also meet the requirements of a clean vacuum.

Piston Vacuum Pump

4. Understand the composition of the gas being pumped. The gas contains no condensable vapor, granular dust and corrosiveness. When selecting equipment, you need to know the composition of the gas and select the corresponding pump for the selected gas. If the gas contains steam, particles, and corrosive gases, it should be considered to install auxiliary equipment in the pump inlet pipeline, such as condensers, dust collectors, etc.

Air Cooled Roots Vacuum Pump

water ring vacuum pump of distillation pressure

Water-ring vacuum pump is a new type of industrial machinery and equipment, in many aspects of use, have been praised by everyone, then on this equipment knowledge, how much do you know?

The distillation pressure of water ring vacuum pump:

1, the common vacuum distillation process of water ring vacuum pump is mostly operated in the pressure range above 104Pa. The mechanism of vacuum distillation is almost the same as atmospheric distillation. The atmospheric distillation unit is basically available.

2. The pressure range of crude vacuum distillation is 1.O*104Pa-2.7x102Pa, and the flow of gas is viscous state. It is easy to achieve distillation in this pressure range.

3. The pressure range of low vacuum distillation is 2.7*102Pa-1.OPa. At this time, the gas is close to the transitional flow state. The selection, design, manufacture, installation and operation of vacuum distillation equipment are strictly required.

4. The pressure range of quasi-molecular distillation is 1.0-1.0*10-2Pa. At this time, the average free path of gas molecules is similar to the size of the distillator, and the gas is in transitional flow state.

5, molecular distillation operation pressure below 1.33*10-2Pa. In molecular distillation or quasi-molecular distillation, the flow of gas is the free movement of molecules, that is, the collision and interference of other molecules in the system can be ignored, at this time, the distillation process is dominated by evaporation from the liquid surface.Vacuum-valve-classification

vacuum pump system in vacuum packaging application

Vacuum packaging is to pack the goods into an air-tight container, vacuum pump system before sealing the container, so that there is no air in the sealed container. Vacuum packaging is also called vacuum packaging or exhaust packaging. This kind of packing can prevent the outside water vapor from entering the packing container, also can avoid the moisture air in the sealed moisture-proof packing, and dew when the temperature drops. Vacuum packaging should be used to prevent excessive vacuum.

Common grains and processed commodities can be packed in vacuum. Vacuum packaging can not only prevent or reduce the oxidation, discoloration and taste of grains, but also inhibit the growth of certain molds and bacteria.piston-vacuum-pump-application

At present, food, oil and other processing and preservation are still in a basic low-grade, extensive state, and China's refrigeration conditions can not be compared with the United States, Japan and other prosperous countries, thus forming a large number of agricultural products and resource consumption. Vacuum packaging can maintain the quality and nutritional components of grain products.vacuum-pump-maintenance-knowledge

Rotary vane vacuum pump introduction

The 2X series rotary vane vacuum pump is the basic equipment used to obtain vacuum in the sealed container.

This series of vacuum pumps can be used independently, and can also be used as booster pumps, diffusion pumps, molecular pumps and titanium pumps. It can be used for vacuum coating, vacuum pouring, electronic tube, bulb, hot water bottle and so on. Medical and health laboratories can also be supplied with this pump.

The pump is not suitable for pumping the gas containing excessive oxygen, harmful, explosive, corrosive to metals, chemical reaction to vacuum oil, dust particles, and can not be used to pump gas from one container to another as a transport pump. When an air valve is installed, a suitable amount of condensable gas can be pumped.

Water ring pump workflow

We all know the principle of water ring pump is to rely on the rotor rotation to complete the work of water absorption and drainage, then you know how it works? Which direction does the rotor turn? If you don't know, take a look at the following article.

The equipment was originally used as a self-suction pump, and then gradually used in petroleum, chemical, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture regain and vacuum degassing, etc., have been widely used. Due to the rapid development of vacuum application technology, water ring pump has been paid much attention in obtaining coarse vacuum. Because the compressed gas in the pump body is isothermal, it can extract flammable and explosive gases, in addition, it can also extract dust, water-bearing gases, therefore, the application is increasing.

Proper amount of water is used as working fluid in the pump body. When the impeller rotates, the water is thrown around by the impeller. Due to the centrifugal force, the water forms a closed ring which is approximately equal in thickness depending on the shape of the pump chamber. The inner surface of the upper part of the water ring is exactly tangent to the hub of the impeller, and the inner surface of the lower part of the water ring is just in contact with the tip of the blade. At this point, a one-month conodont space is formed between the hub and the water ring of the impeller, and this space is divided into several small cavities with the same number of blades by the impeller. If the upper part of the impeller is taken as the starting point, the volume of the small cavity increases from small to large at 180 degrees before the impeller rotates, and is connected with the suction port on the end face. At this time, the gas is sucked in, and the small cavity is isolated from the suction port at the end of the suction. When connected, the gas is discharged out of the pump.

Roots vacuum pump structure

Roots vacuum pump is a kind of vacuum pump without internal compression, usually the compression ratio is very low, so high and medium vacuum pumps need front-stage pumps, because of the special working environment and industry needs, the requirements for equipment is very high, divided into different types of products. How the two rotors of Roots vacuum pump are arranged in the pump body determines the overall structure of the pump. There are generally three schemes for the overall structure of Roots vacuum pump.

1. Vertical type: the axis of the two rotors is installed horizontally, but the plane of the axis of the two rotors is perpendicular to the horizontal plane. This kind of structure, the inlet and outlet of the pump is arranged horizontally, so it is convenient to assemble and connect the pipeline.roots-vacuum-pump-using-in-vacuum-process

2. Horizontal type: the axes of the two rotors are installed horizontally, and the plane formed by the axes of the two rotors is horizontally oriented. The inlet of the pump with this structure is above the pump and the outlet is below the pump (and vice versa). The exhaust ports below are usually horizontally connected, so the intake and exhaust directions are perpendicular to each other. The exhaust port is connected with a three-way pipe which opens in two directions. One end is connected with the exhaust pipe, and the other end is used when the by-pass valve is dead or connected with the by-pass valve. The structure is characterized by low center of gravity and good stability at high speed. Large and medium-sized pumps at home and abroad mostly use this structure.liquid-ring-vacuum-pump-coal-chemical-industry

3.vertical shaft type: two rotors of some roots pumps abroad are installed perpendicular to the horizontal plane. The assembly gap of the structure is easy to control, and the assembly of the rotor is convenient and the occupied area is small.

rotary vane vacuum pump of application

Rotary vane vacuum pump is one of the basic equipment used to remove vacuum gas from sealed container. It can be used alone or as a pre pump for booster pumps, diffusion pumps and molecular pumps. It can be used in vacuum smelting, vacuum welding, vacuum impregnation, coating, vacuum drying, chemical and pharmaceutical industries, electrical vacuum devices and other vacuum operations.

Matters needing attention in rotary vane vacuum pump:

1. The pump can be operated continuously for a long time in the ambient temperature range of 5-40 C and inlet pressure less than 1330 Pa.

2. Pumps are not suitable for pumping gases containing excessive oxygen, toxic, explosive, corrosive to metals, chemical reactions to pump oil, and particulate dust. They are also not suitable for transporting gases from one container to another as transport pumps.

3. Pump at atmospheric pressure to 6000P a under the inlet pressure of continuous working time not more than 3 minutes, in order to avoid injection or lubrication caused by poor pump damage.Rotary-vane-vacuum-pump-in-vacuum-forming-and-laminating-process

High efficiency water ring vacuum pump

Water ring vacuum pump and water ring compressor are high energy consumption, low efficiency products, which is generally recognized as the fact that small pumps are generally 30-35%, large pumps up to 40% or slightly higher, such low efficiency and the national requirements for mechanical and electrical products and China's current energy shortage situation is extremely incompatible.

Therefore, the optimization design method should be adopted as soon as possible to establish mathematical models for the geometric parameters of impeller, the starting position and area of suction and exhaust holes, which are the most important factors affecting the efficiency of the pump, to optimize the design, to select the best combination scheme of the parameters, and to adopt the relevant theories and calculation formulas of vapor-liquid two-phase flow to design as far as possible. Reduce the eddy current loss of the water ring and achieve the goal of increasing efficiency.

Therefore, it is an important task for the design and development of water ring vacuum pump and compressor to eliminate the backward products with high energy consumption and low efficiency.dry-screw-vacuum-pump-vacuum-distillation-process

Roots water ring vacuum unit type

1. Roots pump + water ring pump:

The function of the water ring pump in the unit is to create the reserve vacuum needed by the Roots pump. Generally speaking, the limit vacuum of the single-stage water ring pump is not high, but the pre-vacuum required by the roots pump produced in our country is high, so the single-stage water ring pump is not actually used as the front-stage pump of the Roots pump, and the two-stage water ring pump which can improve the limit vacuum is used. As a front stage pump, the double stage water ring pump can also improve the limit vacuum of the unit.

2. Roots pump + roots pump + water ring pump:

The limit vacuum degree of a Roots pump is lower, especially when it is combined with a water ring pump, the use range is limited, and the limit vacuum degree of the whole unit may be lower. But if two Roots pumps are connected in series with a water ring pump, the limit vacuum degree of the unit can be greatly improved.

3. Roots pump + roots pump + roots pump + water ring pump:

If two Roots pump and water ring pump can not meet the vacuum requirement, one Roots pump can be added. This kind of Roots water ring vacuum unit has been widely used in vacuum freeze-drying and other high vacuum technology.dry-screw-vacuum-pump-vacuum-distillation-process

Water ring vacuum pump principle

Water-ring vacuum pump because of its simple structure, low manufacturing accuracy requirements, easy processing and other related characteristics by many manufacturers like, super-high performance and affordable prices make it stand out among the many types of vacuum pumps, the following mini-series for your popular science about water-ring vacuum pump structure and working principle Related introduction.

Brief introduction of structure and working principle of water ring vacuum pump
1. The working principle is that the gas enters the vacuum pump or compressor through the pipeline through the valve, and then discharges into the gas-water separator through the air-guide bend pipe, and discharges through the gas-water separator exhaust pipe.vacuum-system-in-heavy-steel-industry-application

2. Water-ring vacuum pump (abbreviated as water-ring pump) is a kind of coarse vacuum pump. The limit vacuum it can obtain is 2000-4000Pa, and the vacuum degree of the vacuum pump unit can reach 1-600Pa. Water ring pump can also be used as compressor, called water ring compressor, is a low-pressure compressor, its pressure range is 1 ~ 2 *105Pa meter pressure.

Double stage rotary vane vacuum pump

The double stage rotary vane vacuum pump is mainly composed of pump body, rotor, rotary vane, end cover, spring and so on. A rotor is eccentrically installed in the cavity of the rotary vane pump. The outer circle of the rotor is tangent to the inner surface of the pump cavity (there is a small gap between them). Two rotary vanes with springs are installed in the rotor slot, and the stator is divided into two working cavities (high and low working cavities).

When rotating, the top of the rotary vane keeps contact with the inner wall of the pump cavity by centrifugal force and spring tension. The rotor rotation drives the rotary vane to slide along the inner wall of the pump cavity, which makes the volume of the high-level working chamber expand periodically and suck air. The volume of the low-level working chamber reduces periodically and compresses gas with the help of the pressure of gas and oil. The exhaust valve is pushed off to achieve vacuum.dry-vacuum-pump

When the suction pressure is high (e.g. starting from atmospheric pressure), the gas is compressed in the high-level chamber and the pressure increases sharply, then part of the compressed gas is discharged directly from the auxiliary exhaust valve, and the other part of the gas is compressed and enters the low-level chamber through the interstage passage in the middle wall, and is discharged from the low-level exhaust valve after being compressed again. When the suction pressure is low (e.g. after a period of pump operation), the gas enters the high-level chamber from the suction port, and the pressure produced by the compression of the gas in the high-level chamber is not enough to push the auxiliary exhaust valve and directly enters the low-level working chamber through the interstage channel, and then discharges from the low-level exhaust valve after compression.vacuum-unit-high-vacuum-acquisition-equipment

Rotary vane vacuum pump lubricant

Many users may ask this question: can rotary vane pumps use oil? The answer is not. Why should rotary vane pumps use the specified smooth oil?

Some rotary vane vacuum pump operators in order to save money and use the general oil instead of the use of vacuum pump special oil, which to a certain extent not only increased the use of vacuum pump, repair costs, but also seriously affected the service life of the vacuum pump.

1. vacuum pump special oil has a certain viscosity, the viscosity of the concavo-convex decision of the vacuum pump sealing, viscosity is too small, sealing is not good; too high viscosity, will increase the conflict between the pump blade and cylinder block strength, smooth effect will be worse, together, rotor rotation will become difficult, the pressure of the motor will change The higher the temperature, the higher the oil temperature. The increase of oil temperature will accelerate the emulsification degree of the pump oil, and really affect the concave and convex of the vacuum degree.

2.The chemical properties of special oil for vacuum pump tend to be more stable, and the contents of water, water-soluble acid, insoluble alkali and other impurities are much smaller. The use of special oil can avoid the doubts of replacing vacuum pump oil repeatedly and ensuring the cleanliness of the pump.

3. The saturated vapor pressure of the special oil of the vacuum pump is low and the evaporated light distillate is less. If it is a general vacuum pump oil or oil is very simple evaporation, the use of non-vacuum pump oil is often facing the situation of refueling.vacuum-pump-application-in-vacuum-degassing

Pumping principle of turbo molecular pump

Turbo molecular pumps must work in molecular flow. Because when the pressure of the gas contained in a certain volume vessel is reduced, the mean free path of the gas molecule increases accordingly.

At atmospheric pressure, the average free path of the air molecule is only 0.06 micron, which means that a gas molecule may collide with the second gas molecule as long as it moves in space at 0.06 micron. At 1.3Pa, the mean free path between molecules can reach 4.4mm. If the mean free path is larger than the distance between the vessel walls, the collision probability between the gas molecules and the vessel walls will be greater than that between the gas molecules.vacuum-pump-oil

In the range of molecular flow, the average free path length of gas molecules is much longer than the distance between the blades of the molecular pump. When the wall is composed of a stationary stator blade and a moving rotor blade, more gas molecules will be injected into the rotor and stator blades, laying the foundation for the formation of the directional movement of gas molecules.

Roots vacuum pump rotor

Roots Vacuum Pump as a necessary supporting equipment in the unit, is more important in all respects, although the production of Roots Pump is a conventional product, but also in the deep processing of the product should be in place, for the rotor technology should also be further improved than the previous stage, only to ensure that the Roots Pump products Performance, in the use of the unit to show the proper performance, performance will play out the overall performance of the unit, conducive to supporting the production process of enterprises.

Increasing the technological improvement of Roots vacuum pump rotor is to improve the overall performance of the pump. As long as the quality of the main components is reliable, coupled with strict process requirements and assembly quality, the use of the pump is very consistent with the standards, there will be no abnormalities, in the normal production process can play a good role. Use to enhance the practicability of the unit. Therefore, the process is very important for the integrity of the pump, the times are progressing, the process should also be improved, only advanced technical ability to adapt to the development of products.

Roots vacuum pump is also tightly dependent on advanced technology to achieve today's success, only to refine the product, can have room to play, can effectively provide the enterprise with room for development, this is the product ductility, but also the most important part of the enterprise.molecular-pump-application-in-energy-saving-lamp-manufacturing-process

Vacuum pump price

Vacuum pump is a kind of equipment that every manufacturer will buy, and the price is a very important factor in the choice of time, in fact, its price will be affected by many factors in practice, then what specific include? The following vacuum pump manufacturers will introduce to you:

First, for the same parameters, category of vacuum pump brand is the main factor affecting the price, because this is not only a simple name, but also represents the post-sale and maintenance work, which is now very much valued by everyone.

Two, for the equipment itself, because of different materials, the price deviation is bigger, for example:

1. Stainless steel: Stainless steel has strong corrosion resistance and high tensile strength, so the wall thickness of the parts can be relatively thin, thus further reducing the cost. The price is relatively cheap.vacuum-pump-oil-price

2. Cast iron: the price is relatively cheaper, the drawback is easy to be corroded, parts thick, we can choose according to their actual use.

3. Copper alloy: Strength is about 1/2 of stainless steel castings, so the thickness of the two parts is much thicker than the wall thickness, so that its weight is heavier, is also one of the reasons for the higher price of parts.Dry-vacuum-pump-manufacturer