Product Description

Water ring pumps were originally used as self-priming pumps. It is composed of impeller, pump body, suction and exhaust disk, water ring formed in the pump body wall, suction port, exhaust port, auxiliary exhaust valve and so on.
Water ring pump system
Water ring pump system (4 sheets)
In many processes of industrial production, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum regathering and vacuum degassing, water ring pump has been widely used. Because of the rapid development of vacuum application technology, water ring pump has been paid more attention to the crude vacuum acquisition. Because the gas compression in the water ring pump is isothermal, it can remove flammable and explosive gases, in addition to the removal of dust, water containing gas, therefore, the application of water ring pump is increasing.
The pump body is equipped with an appropriate amount of water as the working liquid. When the impeller rotates clockwise, the water is thrown around by the impeller. Due to the centrifugal force, the water forms a closed ring of approximately equal thickness, which is determined by the shape of the pump cavity. The lower inner surface of the water ring is just tangent to the impeller hub, and the upper inner surface of the water ring is just in contact with the top of the blade (in fact, the blade has a certain insertion depth in the water ring). At this point, a crescent-shaped space is formed between the impeller hub and the water ring, and this space is divided into several small cavities equal to the number of blades by the impeller. If the lower part of the impeller 0° as the starting point, then the impeller in the rotation of 180° before the volume of the small cavity from small to large, and connected with the suction port on the end face, at this time the gas is inhaled, when the end of the suction small cavity is isolated from the suction port; When the impeller continues to rotate, the small cavity from large to small, so that the gas is compressed; When the small cavity is connected with the exhaust port, the gas will be discharged from the pump.
To sum up, the water ring pump relies on the change of the pump chamber volume to achieve suction, compression and exhaust, so it belongs to the variable-volume vacuum pump.
The impeller is installed in the pump body eccentrically. When the impeller rotates, the water entering the pump body is thrown around by the impeller. Due to the centrifugal force, the water forms a closed water ring of equal thickness similar to the shape of the pump cavity. The upper inner surface of the water ring is just tangent to the wheel hub of the impeller, and the lower inner surface of the water ring is just in contact with the top of the blade. At this point, a crescent-shaped space is formed between the impeller hub and the water ring, and this space is divided into several small cavities equal to the number of blades by the impeller. If the upper part of the impeller 0 ° as starting point, and then in front of the rotating impeller, 180 °, the small cavity volume gradually changed from small to big, the pressure reduced constantly, and the mines with suction mouth of the suction or discharge tray, when the pressure inside the small cavity space is less than the pressure of the pump container, according to the principle of balance of gas pressure, the gas is pumped continues to be draw in small cavity, is in the process of suction. When the suction is completed with the suction port isolation, the volume of the small chamber is gradually decreasing, the pressure is increasing, at this time is in the compression process, when the compressed gas reached the exhaust pressure in advance, from the auxiliary exhaust valve in advance. From the section, interlinked with vent small cavity volume further decrease the pressure rise further, when the gas pressure is greater than the exhaust pressure, the compressed air to escape from the vent is in the process of the continuous operation of the pump, continuously carrying on the suction, compression, exhaust process, so as to achieve the purpose of continuous extraction.

Simple structure, low manufacturing accuracy requirements, easy to process.
Compact structure, high pump revolution, generally can be directly connected with the motor, no reduction device. Therefore, with small structure size, large displacement can be obtained, and the floor area is also small.
Compressed gas is basically isothermal, that is, the temperature of compressed gas changes very little.
Because there is no metal friction surface in the pump cavity, there is no need to lubricate the pump, and the wear is very small. Sealing between rotating parts and fixed parts can be completed directly by water sealing.
Even suction, stable and reliable work, simple operation, convenient maintenance.

Common faults and troubleshooting methods
First, vacuum pump degree is not enough
Possible causes: Insufficient motor power supply leads to insufficient speed. Insufficient water supply; The gap between the impeller and the distribution plate is too large; Mechanical seal damage resulting in water leakage; Impeller wear too much; Circulating water can’t be drained.
Elimination method: check whether the power supply voltage is within the rated voltage range of the motor; Increase water supply (must be controlled in the correct range, otherwise it will lead to motor overload heating); Adjust the clearance between impeller and distribution plate (generally 0.15-0.20mm); Replace the mechanical seal; Replace the impeller; Check the water outlet piping.
Two, can not start or start the noise
Possible causes: The power supply voltage of the motor is insufficient. Motor phase failure operation; The pump is not used for a long time, resulting in corrosion; Pump suction debris; Impeller drag distribution plate.
Troubleshooting method: Check whether the power supply voltage is too low; Check whether the motor wiring is firm; If the pump does not lead to corrosion for a long time, you can add a rust remover or open the pump cover to artificially remove rust; Open the pump cover to remove debris; Adjust the distance between impeller and distribution plate.
Three, motor overheating
Possible causes: excessive water supply leads to motor overload; Motor phase loss; The vent is blocked; The impeller drags other parts.
Elimination method: reduce the water supply to the normal range (refer to the pump’s operating instructions for liquid supply); Check whether the wiring is firm; Check the exhaust port; Open the pump cover to adjust the clearance between impeller and other parts.
Four, insufficient flow
Possible causes: Pipe leakage; Resistance loss increases;
Elimination method: check the mechanical seal at the joint; Check pipes and check valves for faults.
Regular maintenance
(1) In normal work, attention should be paid to check the working and lubrication of bearings. The temperature (bearing and outer circle) is generally 15ºC ~ 20ºC higher than the ambient temperature, and the highest temperature is not allowed to exceed 30ºC ~ 35ºC, that is, the actual temperature at the outer circle of the bearing frame should not exceed 55ºC ~ 60ºC; The normal working bearings should be refuelled 3 ~ 4 times a year, the bearings should be cleaned at least once a year, and all the lubricating oil should be replaced.
(2) In normal work, the packing should be pressed regularly. If the packing cannot guarantee the required sealing performance due to wear, the new packing should be replaced. If the mechanical seal is used and leakage is found, check whether the static and static ring of the mechanical seal is damaged or the auxiliary seal is aging. In such cases, new parts should be replaced.
(3) In the appearance of special sound, can remove the pressure plate on the 2 ends of the cover, check whether the 2 end faces of the impeller and the distributor are damaged, but also check whether the exhaust valve plate is normal.
Selection criteria
1, water ring pump vacuum requirements unit 2, water ring pump pumping speed requirements 3, water ring pump operating conditions 4, water ring pump motor power 5, water ring pump voltage requirements 6, water ring pump material requirements.
Matters needing attention
Remove the
Before disassembly, the water in the pump cavity should be released, and the gas-water separator and suction tube parts should be removed. In the process of disassembly, all the gaskets should be carefully removed. If there is damage, the same gasket should be replaced. The pump shall be removed from the rear end (without coupling or pulley end) in the following order:
(1) Remove the rear shaft bearing cap, loosen the 2 round nuts with hook hand, remove the bearing seat and bearing;
(2) Loosen the packing gland nut and remove the packing gland;
(3) remove the hexagonal bolt connecting the pump cover and the pump body and the bolt at the bottom foot of the pump cover, remove the back end cover;
(4) remove the pump body;
(5) Loosen the foot bolt at the other end;
(6) remove the coupling and remove the key on the shaft;
(7) Remove the bearing parts before;
(8) Remove the front end cover and remove the shaft and impeller together.
After disassembly, the parts should be coated with oil on the mating surface, thread should also be coated with oil to protect.


After-sales Service: One Year
Warranty: One Year
Oil or Not: Oil Free
Structure: Rotary Vacuum Pump
Exhauster Method: Positive Displacement Pump
Vacuum Degree: Low Vacuum

Vacuum Pump

Types of vacuum pumps

A vacuum pump is a device that draws gas molecules from a sealed volume and leaves a partial vacuum in its wake. Its job is to create a relative vacuum within a specific volume or volume. There are many types of vacuum pumps, including centrifugal, screw and diaphragm.

Forward centrifugal pump

Positive displacement centrifugal vacuum pumps are one of the most commonly used pump types in the oil and gas industry. Their efficiency is limited to a range of materials and can handle relatively high solids concentrations. However, using these pumps has some advantages over other types of pumps.
Positive displacement pumps have an enlarged cavity on the suction side and a reduced cavity on the discharge side. This makes them ideal for applications involving high viscosity fluids and high pressures. Their design makes it possible to precisely measure and control the amount of liquid pumped. Positive displacement pumps are also ideal for applications requiring precise metering.
Positive displacement pumps are superior to centrifugal pumps in several ways. They can handle higher viscosity materials than centrifuges. These pumps also operate at lower speeds than centrifugal pumps, which makes them more suitable for certain applications. Positive displacement pumps are also less prone to wear.
Positive displacement vacuum pumps operate by drawing fluid into a chamber and expanding it to a larger volume, then venting it to the atmosphere. This process happens several times per second. When maximum expansion is reached, the intake valve closes, the exhaust valve opens, and fluid is ejected. Positive displacement vacuum pumps are highly efficient and commonly used in many industries.

Self-priming centrifugal pump

Self-priming centrifugal pumps are designed with a water reservoir to help remove air from the pump. This water is then recirculated throughout the pump, allowing the pump to run without air. The water reservoir can be located above or in front of the impeller. The pump can then reserve water for the initial start.
The casing of the pump contains an increasingly larger channel forming a cavity retainer and semi-double volute. When water enters the pump through channel A, it flows back to the impeller through channels B-C. When the pump is started a second time, the water in the pump body will be recirculated back through the impeller. This recycling process happens automatically.
These pumps are available in a variety of models and materials. They feature special stainless steel castings that are corrosion and wear-resistant. They can be used in high-pressure applications and their design eliminates the need for inlet check valves and intermediate valves. They can also be equipped with long intake pipes, which do not require activation.
Self-priming centrifugal pumps are designed to run on their own, but there are some limitations. They cannot operate without a liquid source. A foot valve or external liquid source can help you start the self-priming pump.

Screw Pump

The mechanical and thermal characteristics of a screw vacuum pump are critical to its operation. They feature a small gap between the rotor and stator to minimize backflow and thermal growth. Temperature is a key factor in their performance, so they have an internal cooling system that uses water that circulates through the pump’s stator channels. The pump is equipped with a thermostatically controlled valve to regulate the water flow. Also includes a thermostatic switch for thermal control.
Screw vacuum pumps work by trapping gas in the space between the rotor and the housing. The gas is then moved to the exhaust port, where it is expelled at atmospheric pressure. The tapered discharge end of the screw further reduces the volume of gas trapped in the chamber. These two factors allow the pump to work efficiently and safely.
Screw vacuum pumps are designed for a variety of applications. In some applications, the pump needs to operate at very low pressures, such as when pumping large volumes of air. For this application, the SCREWLINE SP pump is ideal. Their low discharge temperature and direct pumping path ensure industrial process uptime. These pumps also feature non-contact shaft seals to reduce mechanical wear. Additionally, they feature a special cantilever bearing arrangement to eliminate potential sources of bearing failure and lubrication contamination.
Screw vacuum pumps use an air-cooled screw to generate a vacuum. They are compact, and clean, and have a remote monitoring system with built-in intelligence. By using the app, users can monitor pump performance remotely.
Vacuum Pump

Diaphragm Pump

Diaphragm vacuum pumps are one of the most common types of vacuum pumps found in laboratories and manufacturing facilities. The diaphragm is an elastomeric membrane held in place around the outer diameter. While it is not possible to seal a diaphragm vacuum pump, there are ways to alleviate the problems associated with this design.
Diaphragm vacuum pumps are versatile and can be used in a variety of clean vacuum applications. These pumps are commercially available with a built-in valve system, but they can also be modified to include one. Because diaphragm pumps are so versatile, it’s important to choose the right type for the job. Understanding how pumps work will help you match the right pump to the right application.
Diaphragm vacuum pumps offer a wide range of advantages, including an extremely long service life. Most diaphragm pumps can last up to ten thousand hours. However, they may be inefficient for processes that require deep vacuum, in which case alternative technologies may be required. Additionally, due to the physics of diaphragm pumps, the size of these pumps may be limited. Also, they are not suitable for high-speed pumping.
Diaphragm vacuum pumps are a versatile subset of laboratory pumps. They are popular for their oil-free construction and low maintenance operation. They are available in a variety of styles and have many optional features. In addition to low maintenance operation, they are chemically resistant and can be used with a variety of sample types. However, diaphragm pumps tend to have lower displacements than other vacuum pumps.

Atmospheric pressure is a key factor in a vacuum pump system

Atmospheric pressure is the pressure created by the collision of air molecules. The more they collide, the greater the pressure. This applies to pure gases and mixtures. When you measure atmospheric pressure, the pressure gauge reads about 14.7 psia. The higher the pressure, the greater the force on the gas molecules.
The gas entering the vacuum pump system is below atmospheric pressure and may contain entrained liquids. The mechanism of this process can be explained by molecular kinetic energy theory. The theory assumes that gas molecules in the atmosphere have high velocities. The resulting gas molecules will then start moving in random directions, colliding with each other and creating pressure on the walls of the vacuum vessel.
Atmospheric pressure is a critical factor in a vacuum pump system. A vacuum pump system is useless without proper atmospheric pressure measurement. The pressure in the atmosphere is the total pressure of all gases, including nitrogen and oxygen. Using total pressure instead of partial pressure can cause problems. The thermal conductivity of various gases varies widely, so working at full pressure can be dangerous.
When choosing a vacuum pump, consider its operating range. Some pumps operate at low atmospheric pressure, while others are designed to operate at high or ultra-high pressure. Different types of pumps employ different technologies that enhance their unique advantages.
Vacuum Pump

The screw pump is less efficient in pumping gases with smaller molecular weight

Vacuuming requires a high-quality pump. This type of pump must be able to pump gas of high purity and very low pressure. Screw pumps can be used in laboratory applications and are more efficient when pumping small molecular weight gases. Chemical resistance is critical to pump life. Chemical resistant materials are also available. Chemically resistant wetted materials minimize wear.
Gear pumps are more efficient than screw pumps, but are less efficient when pumping lower molecular weight gases. Gear pumps also require a larger motor to achieve the same pumping capacity. Compared to gear pumps, progressive cavity pumps also have lower noise levels and longer service life. In addition, gear pumps have a large footprint and are not suitable for tight spaces.
Progressive cavity pumps have two or three screws and a housing and side cover. They are also equipped with gears and bearings. Their mechanical design allows them to operate in high pressure environments with extremely low noise. The progressive cavity pump is a versatile pump that can be used in a variety of applications.
Dry screw compressors have different aspect ratios and can operate at high and low pressures. The maximum allowable differential pressure for screw compressors ranges from 0.4 MPa for 3/5 rotors to 1.5 MPa for 4/6 rotors. These numbers need to be determined on a case-by-case basis.

China wholesaler Zgzb Water Ring Vacuum Pump   vacuum pump adapter	China wholesaler Zgzb Water Ring Vacuum Pump   vacuum pump adapter
editor by CX 2023-04-21