Roots water ring vacuum unit

Roots water ring vacuum unit is composed of roots pump as main pump and water ring pump as front pump in series. It can be understood as two main points: water ring pump and roots pump. 

Both roots pump and roots vacuum unit have a number of utility model patents, for example, the series Roots vacuum unit that can be started at the same time solves the shortcomings of the start-up mode of Roots vacuum unit in the prior art, such as long time consuming, low efficiency and large energy consumption, mainly including the front vacuum pump and roots vacuum pump driven by the motor of Roots vacuum pump An exhaust port is arranged on the roots vacuum pump, an air suction port is arranged on the roots vacuum pump, a pneumatic ball valve is arranged between the front vacuum pump and the roots vacuum pump, and the motor, the pneumatic ball valve and the differential pressure detection device of the front vacuum pump are all controlled by the control cabinet. The beneficial effect of the utility model is: on the premise of ensuring that the motor of the roots vacuum pump is not overloaded, the pumping speed is increased by controlling the pressure difference between the inlet and outlet of the roots vacuum pump, so as to shorten the starting time of the vacuum unit.

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Roots Vacuum Pump 

Limit pressure of water ring vacuum pump

As each water ring vacuum pump manufacturer's products are different, so the parameters are also different. But their pressure is determined by the structure and quality. Users can judge the limit pressure of water ring vacuum pump according to the following two points: 

1. Limit relative pressure: the relative pressure is how much lower the measured internal pressure is than "atmospheric pressure". Because the air inside the container is pumped, the pressure inside the container is always lower than that outside the container. Therefore, when expressed in terms of relative pressure or gauge pressure, the value must be preceded by a negative sign, indicating that the internal pressure of the container is lower than the external pressure.

2. Ultimate absolute pressure: absolute pressure is the pressure higher than the theoretical vacuum. It compares the absolute vacuum pressure of the theoretical state. Due to the limitation of technology, we can't pump the internal pressure to the absolute vacuum value of 0Pa in any case. Therefore, the vacuum value pumped by the water ring vacuum pump is higher than the theoretical vacuum value.

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Oil change operation of vacuum pump unit

Whether it is a vacuum pump unit or any other mechanical equipment, it is inseparable from lubricating oil, because lubricating oil can effectively help the equipment to work better. However, this lubricant cannot maintain its function for a long time. It needs to change the oil according to the use of the device. Because after a long time of work, the oil quality of the unit will be polluted by various external factors, otherwise, if the lubricating oil is replaced in time, the unit will be damaged. 

1. When the vacuum pump is equipped with replacement oil, the pump should be taken out of the vacuum system first.

2. After that, the end of the chassis motor should be raised. Open the oil drain plug to drain the oil. Turn the device to keep the exhaust port, let all dirty oil in the chamber drain out from the oil drain port, and then add new oil from the air inlet. Oil 100-500ml continuous rotation 5-10 rpm or more for internal cleaning, this operation 3-5 times.

3. After taking out the oil, cover the oil plug, put the pump horizontally, add new oil from the air inlet and oil hole, and change the oil.

4. When the vacuum pump is equipped with oil displacement, it is not recommended to start the motor for a long time. At this time, the exhaust valve will be too severe and fatigue.

5. When changing the oil of vacuum pump unit, kerosene, gasoline, alcohol, etc. should not be used for non disassembly cleaning of the pump.

6. If the pump stops for a long time, the exhaust hood should be removed and the exhaust plug should be closed to the air inlet and drained。

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Analysis on installation of water ring vacuum pump unit

The key to the installation technology of water ring vacuum pump unit is to determine its installation height. This height refers to the vertical distance between the water surface of water source and the center line of impeller, which can not be confused with the allowable vacuum height. The vacuum value on the water ring vacuum pump's water inlet section is indicated on the nameplate or product manual of the water ring vacuum pump, and it is under 1 standard atmospheric pressure and when the water temperature is 20 ℃, The installation height of water ring vacuum pump should be allowed to absorb the vacuum height after deducting the loss head of the suction pipe. It needs to overcome the actual terrain suction height. 

The installation height of water ring vacuum pump unit should not exceed the calculated value, otherwise it will not be able to pump water. In addition, the influence of the calculation value is the resistance loss head of the suction pipe. Therefore, the shortest pipeline layout should be adopted, and the fittings such as elbows should be installed as few as possible, and the water pipe with larger diameter can also be considered to reduce the flow velocity in the pipe. It should be pointed out that when the elevation and water temperature of the water ring vacuum pump installation site are different from the test conditions, the calculated value should be corrected. That is, the atmospheric pressure at different altitudes and the saturated vapor pressure when the water temperature is higher than 20 ℃.

When the water temperature is below 20 ℃, the saturated vapor pressure can be ignored. In terms of pipeline installation technology, the suction pipe should be strictly sealed, and no air or water leakage is allowed. Otherwise, the vacuum degree at the water inlet of the water ring vacuum pump will be destroyed, and the water output of the water ring vacuum pump will be reduced, and even the water can not be pumped in serious cases. Therefore, it is necessary to do a good job in pipeline interface work to ensure the construction quality of pipeline connection.
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Roots Vacuum Pump 

Wear reason of glass fiber reinforced plastic water ring vacuum pump

The wear of glass fiber reinforced plastic water ring vacuum pump is essential, so what is the cause of its wear? Let's analyze the wear factors of glass fiber reinforced plastic water ring vacuum pump together 

The wear of the journal surface of glass fiber reinforced plastic water ring vacuum pump is uneven. The radial wear of the main journal and the connecting rod journal is mainly elliptical, and the maximum wear parts are corresponding to each other, that is, the maximum wear place of each main journal is close to the side of the connecting rod journal, and the maximum wear place of the connecting rod journal is also close to the side of the main journal. The crankshaft journal also has conical wear along the axial direction. The elliptical wear of journal is caused by the uneven distribution of the force acting on the journal along the circumference

When the engine is working, the comprehensive force acting on the connecting rod journal always acts on the inner side of the connecting rod journal, and the direction is outward along the radius of the crankshaft, resulting in the maximum wear on the inner side of the connecting rod journal and forming an ellipse. The reason for the conical wear of the connecting rod journal is that the oil passage leading to the connecting rod journal is inclined. When the glass fiber reinforced plastic water ring vacuum pump rotates, the mechanical impurities in the lubricating oil accumulate on one side of the connecting rod journal under the action of centrifugal force, which accelerates the wear of the side journal and makes the wear of the connecting rod journal cone-shaped.

In addition, the bending of the connecting rod, the cylinder center line is not vertical to the center line of the glass fiber reinforced plastic water ring vacuum pump, etc., will make the axial force of the journal uneven, resulting in wear deflection. The wear of the main journal is elliptical, which is mainly due to the influence of centrifugal force of connecting rod, connecting rod journal and crank arm, which makes the relative wear between the side close to the connecting rod journal and the bearing larger. In addition, abrasions and burns may occur on the surface of the journal. Scuffing is mainly due to the oil is not clean, which large hard mechanical impurities in the journal surface scratch caused. The burn on the surface of journal is caused by Bush burning, which is mainly caused by insufficient lubrication, too thin oil and blocked oil circuit.

API 681 Liquid Ring Systems

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

Market prospect of oil free scroll vacuum pump

Oil free scroll vacuum pump has the characteristics of oil-free, clean, low vibration noise and low energy consumption, so it has broad development prospects and market potential. However, due to the complex design and manufacturing technology of the scroll pump, mass production has not been realized in China at present, which can not meet the increasing market demand, so it can only rely on imported products with high price and inconvenient after-sales service. In addition, affected by many factors such as the development of the market and the degree of understanding of users, the vortex pump has not formed a virtuous cycle in China. 

Even so, the actual annual demand of scroll pumps in China is still more than thousands. It can be considered that with the emergence of high-precision CNC machine tools and machining centers, opportunities have been brought for the development of vortex technology, and the key manufacturing technology has been broken through; At the same time, China now has a certain number of experienced professionals in design, research and development, testing, analysis and use, and are committed to the technical development of pumps. It is believed that in the near future, domestic oil-free scroll vacuum pumps with moderate price, reliable performance and batch production will become the mainstream products suitable for the requirements of China's market. Therefore, increasing investment, R & D and mass production of scroll vacuum pump suitable for domestic demand has become one of the important tasks of the whole vacuum acquisition industry in China.

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Roots Vacuum Pump

Technical knowledge of water ring vacuum pump

 First of all, we should understand the working range of vacuum pump and water ring, but we should pay more attention to the application of water ring and water ring? 

Water ring vacuum pump can also be simply called water ring pump. It is a kind of rotary variable volume vacuum pump which can change the volume. It is mainly composed of impeller, pump body, suction and exhaust disc, suction port, exhaust port, auxiliary exhaust valve and other parts. When working, it mainly rotates at high speed through the eccentric rotor with fixed blades inside, throwing the medium into the pump body through the suction process to the stator The liquid ring, which is concentric with the stator, is formed by external force. The liquid ring and the high-speed rotating fixed blade constitute a kind of variable volume vacuum pump with variable volume.

The working principle of water ring vacuum pump is to fill the pump first, that is to avoid the rotor idling and inject appropriate amount of water. When the pump starts according to the start-up procedure, with the high-speed rotation of the fixed blade, the filled water also runs at high speed due to external force, resulting in centrifugal effect, and forms a water ring in the outer ring of the fixed blade. When the fixed blade is rotated to be connected with the suction port and the exhaust port, the suction process and exhaust process are carried out respectively. During the suction process, the volume of the small chamber gradually increases from small to large. During the exhaust process, due to the continuous rotation of the impeller, the gas is compressed, and the gas is discharged when connected with the exhaust port.

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Roots Vacuum Pump 

Quality of Roots vacuum pump

The practical production of Roots vacuum pump is carried out through various processes. In order to strengthen the quality of the blank, the deep processing should be carried out strictly. The management system should be done in time to help the production of waste products. Under the condition of not affecting the order production, the waste parts should be treated well, and the man hour quota should be controlled well On the basis of the bottom operation, we should timely corresponding to the needs of the market, and strengthen the optimization of the processing technology of the products. 

The use of Roots vacuum pump strength has become an important condition to promote the development of enterprise productivity. Its use in different occupations has different application ability, but the same point is that it can not be used as a single pump, it can only be assembled with other equipment into unit products for use, playing a driving strength foundation. Through the use function of the equipment itself, it can be useful For the use of other equipment to achieve a higher functional strength, improve the driving effect of product application.

Under the premise of accelerating the development of Roots vacuum pump's useful effect, it is necessary to make continuous performance of product application and function, further enhance the improvement of its product superiority, let the application of its products drive the development of enterprise's productivity, promote the continuous improvement of its application function in all aspects, fully accelerate the driving of its product application ability, and make it continuously perform on the basis of rational use Show the outstanding performance of the product application effect, and then show the usable function of the equipment.

In order to improve the quality of Roots vacuum pump, it is necessary to combine the status of product application, improve the development of all application strength, and constantly complete the overall driving of product application ability, so that it can enhance the continuous improvement of its quality advantage under the advantage effect of reasonable use, and make it show internal use advantage in the development process.

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Roots Vacuum Pump

Limit pressure of rotary vane vacuum pump

Soon after the rotary vane vacuum pump began to work, the minimum pressure P'g appeared. The pump continued to run, because of the increase of pump temperature, the saturated vapor pressure of pump oil increased, the viscosity decreased, and the inlet pressure slightly increased to PG. PG is the minimum stable pressure obtained by the pump and also the ultimate pressure of the pump. 

The limit pressure of rotary vane vacuum pump is related to the type of vacuum gauge used in measurement. The results show that the limit pressure is about one order of magnitude lower than that measured by a heat conduction vacuum gauge (thermocouple or piezometer, etc.). This is because the former can only measure the partial pressure of the permanent gas, and the latter can measure the total pressure of the compressed gas. The current regulation of our country is to measure the limit pressure of mechanical pump with oil seal by using compression vacuum gauge.

The amount of circulating oil also affects the limit pressure of the pump. With the increase of oil quantity, the sealing effect is better. The relationship between the limit pressure and oil quantity of rotary vane vacuum pump changes, and the saturated vapor pressure Po of oil is finally reached. In fact, the pump oil contains a lot of air and water. After the pump oil enters the pump cavity, the air and water absorbed in the pump oil are released again. The relationship between the pump limit pressure and the oil quantity develops upward. Generally, the pump oil should be kept at the specified oil level to keep the circulating oil volume of the pump constant. For the two-stage pump, the pump oil can enter the high vacuum stage only after degassing in the low vacuum stage, which can reduce the amount of bleeding of the pump oil in the high vacuum stage and reduce the limit pressure of the pump.

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water ring vacuum pump overall application

By reflecting the strength of water ring vacuum pump products, in the application process of enhancing the application and performance development of its products, it is necessary to continuously speed up the overall play of its practical performance with high-quality performance advantages. In order to speed up the promotion of product utilization advantages and fully reflect the embodiment of product value ability, it is necessary to improve the product performance driven by product application and strength, so as to achieve high-efficiency Quality application ability, expand the overall promotion of its advantage role, and constantly enhance the play of its product value ability. 

Focusing on the performance advantage of water ring vacuum pump, we should give full play to the product advantage level, continuously enhance the overall driving force of its quality strength, through the reliability promotion of its value application performance, with the rapid development of product advantages, realize the role of improving the overall performance of the product, do a good job in the promotion of product application and performance advantages, and develop the overall promotion of its quality So as to speed up the pioneering of its performance advantage level.

In order to speed up the continuous improvement of water ring vacuum pump quality performance, it is necessary to improve the product strength, enhance the pioneering ability of product application and advantage, accelerate the overall improvement of its quality and practical ability, increase the continuous improvement of its quality strength and expand the overall development of its product practical performance with reliable product application effect.

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Roots Vacuum Pump 

Development trend of vacuum pump

With the continuous increase of environmental protection, some enterprises or manufacturers of water ring vacuum pump were forced to stop using this type of vacuum pump due to many sewage discharge. It is necessary to choose oil-free vacuum pump or closed circulation system and large-scale oil-free vacuum unit instead, such as vertical oil-free reciprocating pump and oil-free rotary vane pump, oil-free vertical vacuum pump and oil-free vacuum pump with vacuum High degree, fast pumping speed, no pollution benefits. Because there is no sewage discharge, so the oil-free vertical vacuum pump is especially suitable for chemical, pharmaceutical and food industries, especially in clean high vacuum or gas recovery environment. 

The application scale of oil-free vacuum pump is more extensive, which is used in the absorption and transportation of various goods, and the material supply equipment of active machinery. The planning of closed cycle system is to recycle the discharged polluted liquid, which greatly reduces the damage to the environment; the second is to recover the usable medium and reduce the cost of production.

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Principle of gas liquid separation by reciprocating vacuum pump

Do you know much about reciprocating vacuum pump? If you don't know much about it, the following will help you. Let's introduce the principle of reciprocating vacuum pump to realize gas-liquid separation. Let's take a look at it 

The liquid water of reciprocating vacuum pump will spread on the surface of hydrophilic material. If the porous structure is made of hydrophilic material (there is a gap between the holes), the porous structure will become a special channel for liquid water, just like many capillary tubes. In the same way, porous structure made of hydrophobic materials will become a special channel for gas. In this way, the hydrophilic or hydrophobic properties of the material are used to realize gas-liquid separation.

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Vacuum pump oil filtration and replacement skills

After the dust, impurities and contaminated oil sink into the bottom of the main oil tank, they flow into the auxiliary oil tank through the oil return pipe. Through separation and deposition, the emulsified oil, water, dust and impurities sink into the bottom of the auxiliary oil tank and are discharged regularly by the drain valve. The relatively clean oil is filtered by the filter in the upper part of the auxiliary oil tank and then enters the oil separation chamber through the oil inlet pipe, and then supplies the end cover and pump chamber for operation. 

In the process of using vacuum pump oil, because of oxidation, emulsification and other factors mixed with various impurities, some of the oil degenerates. When the degenerated components and impurities reach a certain degree, the color of the oil changes, the viscosity and acid value increase, and insoluble resin like substances are separated out, resulting in the increase of vapor pressure of vacuum pump oil and the deterioration of its function. At the moment, the pump oil can not be used continuously. It is necessary to replace the pump oil with a new one.

In order to prevent the dust and particles in the vacuum pump oil from entering the pump cavity along with the pump oil. For some technical processes. In the process of pump operation should be equipped with continuous filtering equipment. After the dust, impurities and contaminated oil sink into the bottom of the main oil tank, they flow into the auxiliary oil tank through the oil return pipe. Through separation and deposition, the emulsified oil, water, dust and impurities sink into the bottom of the auxiliary oil tank and are discharged regularly by the drain valve. The relatively clean oil is filtered by the filter in the middle and upper part of the auxiliary oil tank, and then enters the oil separation chamber through the oil inlet pipe, and then supplies the end cover and pump chamber for operation.


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Vacuum penetration technology of vacuum pump

Vacuum impregnation in food industry refers to the process that food is directly placed in the impregnation solution of container. Under vacuum and normal temperature, through long-time immersion, the impregnation liquid can slowly penetrate into the food and complete the process of taste. It is often used in the processing of fungus food. Compared with room temperature impregnation, it has a shorter time and more delicious effect. 

Most of the vacuum impregnation equipment in the prior art includes the impregnation tank, the air exhausting device, the feeding device and the discharging device. After the materials are placed in the impregnation cage, they are placed in the impregnation tank as a whole. After vacuumizing, the impregnating material is discharged and the impregnation cage is put forward. 

In the long-term working process, the staff found that the existing technology has the problem of uneven taste of materials. For food, there are often dead points where the raw materials are stacked, which are difficult to be touched by the impregnating materials. At these dead points, the finished products will not taste good.

In order to solve the problem that the finished product in the prior art can not taste evenly and the quality control is poor. A kind of vacuum impregnation equipment is put forward based on the practical model.

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Roots Blowers

Roots Vacuum Pump 

Working principle of circulating water cooling device for vacuum unit

Pump the water in the storage tank into the water sprayer, and pump the water to the cooling water inlet of the unit 

Under the action of exhaust fan, the water evaporates on the surface, dissipates heat and cools down, and then returns to the water storage tank. The distribution of the holes on the porous plate determines the position of the water column, so that the small holes on the porous plate are evenly distributed, so that the air flow can fully contact the water column and form the surface of swallow hair as large as possible Achieve the purpose of water cooling 

Considering that the water discharged from the vacuum unit is far away from the air and the temperature difference between it and the air is relatively large, the first stage of forced cooling with air cooling is designed. The water discharged from the vacuum unit passes through the radiator first, and the radiator is placed behind the fan, and then the cool air passing through the water is blown to the radiator, so that the hot water discharged from the diffusion pump is cooled, and then returned to the water storage tank. The cooling water flow in the diffusion pump can be controlled It was observed directly in the device.

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Roots Vacuum Pump 

rotary vane vacuum pump temperature requirements

The working principle of rotary vane vacuum pump is known to all. But the temperature of rotary vane vacuum pump is too high. It refers to the maximum oil temperature measured near the low-level exhaust valve that exceeds the value specified in the instruction manual. Rotary vane vacuum pump is generally used at room temperature no less than 5 and relative temperature no higher than 90%. The gas enters the high vacuum chamber from the intake nozzle. At first, the high and low vacuum chambers are filled with atmosphere, and both exhaust valves are opened for exhaust. 

With the progress of air pumping, the air pressure decreases (i.e. the vacuum degree increases). The pressure in the high vacuum chamber is not enough to push the exhaust valve open. The gas enters the low vacuum chamber through the middle partition plate. At this time, the pressure is not enough to open the exhaust valve. However, there is a certain amount of oil entering the low vacuum chamber to help push open the exhaust valve, and the gas will be discharged. The discharged gas is mixed with oil particles, which are filtered by the oil screen to separate the oil. Only the gas is discharged from the pump.

The oil in the oil seal chamber of the rotary vane vacuum pump is supplied by the oil pool a through the hole on the front plate. The oil in the low vacuum chamber is supplied by the oil pool a through the holes in the rear end plate. The oil in the high vacuum chamber is circularly supplied by the hole in the middle diaphragm. The oil in the oil seal chamber of the rotary vane vacuum pump is supplied by the oil pool a through the hole on the front plate. The oil in the low vacuum chamber is supplied by the oil pool a through the holes in the rear end plate. The oil in the high vacuum chamber is circularly supplied by the hole in the middle diaphragm. The seal of the front and rear end covers of the rotary vane vacuum pump is sealed by the oil pool B on the upper part of the pump body and flowing into the oil groove through the hole in the end face chamber of the pump body.


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Selection skills of high temperature oil pump

 Selection skills of high temperature oil pump 

As a kind of high quality hot oil circulating pump and heat carrier pump, high temperature oil pump is an ideal matching pump in heat exchange equipment, which can transport high temperature liquid without solid particles.

The high temperature oil pump adopts self heat dissipation structure and changes the traditional water cooling structure, which makes the pump structure more reasonable, efficient and energy-saving, optimizes the product performance and greatly improves the reliability of use.

The selection of high temperature oil pump can be considered from five aspects: pipeline layout, operation and operation conditions, liquid property, liquid delivery capacity and unit head.

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Characteristics and application of vacuum negative pressure station

Vacuum negative pressure station is commonly used in hospitals to provide the vacuum source of medical gas central station. The main structure is a complete set of system with water ring vacuum pump as the main part and vacuum buffer tank as vacuum storage equipment. The vacuum negative pressure device saves the cost and energy and improves the service life of the vacuum pump. 

As to the frequent use of vacuum source and the need for less pumping volume, the negative pressure station system wastes more power than the direct use of vacuum pump as vacuum source, and effectively extends the service life of vacuum pump and improves the economic benefits of the enterprise. The vacuum negative pressure station is composed of single or double vacuum pumps as the main equipment for vacuum acquisition and the vacuum tank as the vacuum storage equipment, The vacuum negative pressure station is formed by connecting the electrical control part, and the double pump task can enhance the guarantee of the system

Vacuum pumps and compressors are usually used to pump gases that do not contain solid particles, are insoluble in water, and are not corrosive, so as to form vacuum and pressure in closed containers. By changing the structural materials. Vacuum negative pressure station can also be used for pumping corrosive gas or using corrosive liquid as working fluid. Vacuum negative pressure station can be widely used in papermaking, chemical, petrochemical, light industry, pharmaceutical, food, metallurgy, building materials, electrical appliances, coal washing, mineral processing, chemical fertilizer and other industries.

CL Sereis Cone Liquid Ring Vacuum Pump

Roots Blowers

Roots Vacuum Pump

What is the working principle of hydraulic ejector

Hydraulic ejector has double functions of vacuumizing and condensing secondary steam. It is a vacuum unit composed of nozzle, suction chamber, conical guide baffle, mixing chamber, throat, diffusion pipe and inlet pump. 

The hydraulic ejector uses the pressure of the water pump to put water into the nozzle. The water pump adopts 3k-9 water pump in series, or uses five-stage centrifugal pump. The flow of the pump must meet the demand of secondary steam cooling water. Its head must also meet the requirements of water inlet pressure of hydraulic ejector. When the water with a certain pressure passes through the nozzle with small cross-section area, a high-speed jet of 15-30 M / s will be produced at the nozzle outlet. After a certain distance, the jet water will converge on the same focus accurately. Due to the increase of kinetic energy at the nozzle outlet, the potential energy at the nozzle outlet will be reduced, resulting in a certain negative pressure. The secondary steam will be continuously sucked in to cool it with the top entry The water is in direct contact with cross flow, and carries out strong heat and mass exchange, which makes the secondary steam condense into liquid, and makes its volume decrease rapidly. Thus, a certain vacuum degree is obtained and the concentration process can be carried out smoothly. At the same time, the non condensing gas is pumped out by the high-speed jet beam and discharged out of the system through the throat, diffusion pipe and discharge pipe.

When installing a hydraulic ejector, the lower end of the discharge pipe does not need to be immersed in the water layer of the water tank. The water seal formed when the lower end extends into the water can not overcome the phenomenon of backflow of cooling water, on the contrary, it will only increase the backflow of cooling water. The hydraulic jetting apparatus has double functions, no need to install vacuum pump and water pump. It has simple structure and convenient operation. There is no mechanical operation part, high efficiency, less energy consumption than other types, but more water consumption, and a certain degree of cleanliness of cooling water is required, otherwise the nozzle is easy to be blocked.

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Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Corrosion resistant high suction self priming pump

In many working conditions, because the suction inside the container itself is negative pressure, a large suction self-priming pump is needed to suck out the liquid in the container. Then the self-priming pump must first consider the vacuum negative pressure higher than the container. For example, the negative pressure value in a container is -0.08mpa. Under this condition, the vacuum degree of the self-priming pump must be higher than-0.09mpa, so it must be considered Select high negative pressure self-priming pump products. 

For example, our self-priming pump with fast water absorption has a negative pressure of -0.09mpa at the inlet. If the container and the pump are installed on the same plane, we can choose the high suction self-priming pump product. However, we should consider the choice of high suction self-priming pump products when the flow rate should be doubled.

For example, if the required flow rate is 2m3 / h, then we should select 4m3 / h self-priming pump when selecting high suction self-priming pump products. It should be noted that if the pump outlet pipeline system is not the same negative pressure, we need to install linkage valve and check valve at the outlet, and then close the outlet valve before starting the high suction self-priming pump, and then open the outlet valve after the high suction self-priming pump runs Just the door. The series of corrosion-resistant high suction self-priming pump materials are mainly divided into various stainless steel materials, PP polypropylene materials, PVDF fluoroplastic materials, Hastelloy steel materials for different working conditions.

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Roots Vacuum Pump