China high quality Smart Design Pump China Chemical Dosing Pump Vacuum Pump for Chemical Industry vacuum pump brakes

Product Description

JWM-B Series Mechanical Diaphragm Dosing Pump
Product features:
• The main body of the pump, made of die-cast quality aluminum alloy, features light weight. The motor i s available in
  single-phase and three-phase so as to match the power supplies in different occasions.
As for pump head, there are such materials as PVDF, RPP, PVC, SUS304 and SUS316 available, which widens the
  application scope.
Easy installation, compact shape, and high operating safety
0-100% accurate flow regulation is made possible during operation or shutdown.
The outlet pressure is usually below 1.0 Mpa.
 Modularized design renders both maintenance and repair more convenient.The transmission mechanism requires no oil
  bath  lubrication.
 A digital controller can be added to achieve remote control.

Model Rated Flow rate
Rated Pressure (Mpa) Stroke
JWM-B 6.5/1.0 6.5 1.0 2 75 Φ65 Induction Motor 220V, 40W, three-phase 380V, 50HZ,40W 7.3
JWM-B 12/1.0 12 135
JWM-B 24/1.0 24 4 90
JWM-B 32/1.0 32 108 Induction Motor 220V, 60W, three- phase 380V, 50HZ, 60W 7.5
JWM-B 42/1.0 42 150
JWM-B 60/1.0 60 150
JWM-B 60/0.6 60 0.6 5 108 Φ84 Induction Motor 220V, 90W, three-phase 380V, 50HZ, 90W 8.5
JWM-B 80/0.5 80 0.5
4 135
JWM-B 100/0.5 100 150
JWM-B 120/0.5 120 5 150
JWM-B 150/0.5 150 150 Φ94

Note: the weight in the table is based on PVC pump heads and ordinary motors. If you need other data, please contact our sales representatives.
Wet Parts Material

Pump Head / Check Valve Body Diaphragm Valve Seat Valve Ball O-ring
RPP PTFE+Rubber RPP Ceramics/Glass FKM/PTFE
PVC PTFE+Rubber PVC Ceramics/Glass FKM/PTFE
PVDF PTFE+Rubber PVDF Ceramics/Glass FKM/PTFE
304 PTFE+Rubber SS316L SS316L FKM/PTFE
316L PTFE+Rubber SS316L SS316L FKM/PTFE

After Sales Service
If you encounter any problems during use, please dial our after-sales service phone number (each metering pump has a unique factory number on the nameplate, please inform us of this number when contacting our after-sales service personnel, so that we can verify the corresponding model and technical parameters of the product.)

Shipping Cost:

Estimated freight per unit.

To be negotiated
After-sales Service: Yes
Warranty: 1 Year
Certification: RoHS, CE/ISO9001:2008 /ISO45001:2018 /ISO14001:2015
US$ 200/Piece
1 Piece(Min.Order)


Order Sample

Special materials can be customized


Vacuum Pump

How to install a vacuum pump

A vacuum pump creates a relative vacuum within a sealed volume by drawing gas molecules from the sealed volume. Vacuum pumps can be used in a variety of industrial applications. They also offer various lubrication options. If you are considering purchasing, please understand its functions and features before purchasing.

How it works

The working principle of a vacuum pump is called gas transfer. The principle can be further divided into two basic categories: positive displacement and momentum transfer. At high pressure and moderate vacuum, gas molecules collide and move and create a viscous flow. At higher vacuum levels, gas molecules separate to create molecular or transitional flows.
Another principle of vacuum pumps is fluid-tightness. There are two main types of seals: rotary seals and screw seals. Rotary seals prevent liquid leakage, while screw seals only allow liquids to flow out at higher pressures. Some pumps may not use the third seal.
The flow rate of the vacuum pump determines the machine’s ability to pump a certain amount of material. A higher pumping speed will shorten the drain time. Therefore, the mass flow of the vacuum pump must be carefully considered. The speed and type of vacuum must also be considered.
The working principle of a vacuum pump is to push gas molecules from a high-pressure state to a low-pressure state. This creates a partial vacuum. There are many different types of vacuum pumps, each with different functions. Some are mechanical, some are chemical. In either case, their function is the same: to create a partial or complete vacuum. Vacuum pumps use a variety of technologies and are sized according to the application. Proper sizing is critical for optimum efficiency.
Gas transfer pumps use the same principles as vacuum pumps but use different technology. One of the earliest examples is the Archimedes spiral. Its structure consists of a single screw inside a hollow cylinder. More modern designs use double or triple screws. The rotation of the screw causes gas molecules to be trapped in the cavity between the screw and the housing. The fluid is then discharged at slightly above atmospheric pressure. This difference is called the compression ratio.
Another type of vacuum pump is a diffusion pump. Its main use is industrial vacuum processing. It is used in applications such as mass spectrometry, nanotechnology and analytical instrumentation. These pumps are generally inexpensive to purchase and operate.


Vacuum pumps are essential for many scientific and industrial processes. They are used in the production of vacuum tubes, CRTs, lamps and semiconductor processing. They can also be used to support mechanical equipment. For example, they can be mounted on the engine of a motor vehicle. Likewise, they can be used to power hydraulic components of aircraft. Among other uses, the vacuum pump helps calibrate the gyroscope.
Vacuum pumps are widely used in the pharmaceutical industry and are one of the largest users of this technology. They help deal with hazardous materials and eliminate waste quickly. They are also used in power jets, dump fuel tanks and rear doors, among others. However, they are sensitive to contamination and should only be used in environments where leaks can be prevented. Therefore, choosing the right fluid for the application is very important.
The most popular type of vacuum pump is the rotary vane pump. These pumps are known for their high pumping speed and low pressure. Their efficient pumping capacity allows them to reach pressures below 10-6 bar. Additionally, they are usually oil-sealed and have excellent vacuuming capabilities.
Vacuum pumps are often used to remove air from closed systems. They create a vacuum by reducing the density of the air in the compressed space. This is done by using the mechanical force energy generated by the rotating shaft. When the pump is under pressure, it converts this energy into pneumatic power. When the pressure is different, the energy produced depends on the volume of the gas and the pressure difference between the inner and outer atmospheres.
Vacuum pumps are also used in the manufacture of solar cells. They are used in the manufacture of solar cells, including ingot casting processes as well as cell and module processes. The design of the vacuum system plays an important role in reducing the cost of the process, thus making it profitable. Due to their low maintenance costs, they are an invaluable tool for making solar cells.
Vacuum pumps are widely used in many applications. In addition to industrial and research uses, they are also used in water remediation.
Vacuum Pump

Oil Lubrication Option

Vacuum pumps are available in a variety of oil lubrication options. Choosing the right lubricant can help protect your vacuum pump and maximize its performance. Different base oils may contain different additives, such as antioxidants, and some contain additional additives for specific purposes. You should choose an oil with the right concentration of these additives for optimal lubrication of your vacuum pump.
Vacuum pumps are usually lubricated with paraffinic mineral oil. However, this type of lubricant evaporates as the temperature increases. To minimize evaporative losses, choose a lubricant with low vapor pressure. Also, you should choose lubricants that are resistant to extreme temperatures. Extreme temperatures can put extra stress on the oil and can even significantly shorten the life of the oil.
In terms of viscosity, synthetic oils are the best choice for vacuum pumps. These types of oils are designed to resist gas dissolution and are more resistant to corrosion. Therefore, synthetic oils are ideal for handling aggressive substances. Whether or not your pump needs lubrication, choosing a quality product is important.
The vacuum pump oil should be changed periodically according to the manufacturer’s recommendations. If you use a filter, you should also change the oil as soon as the filter reaches the end of its life. Unplanned oil changes will eventually cause the vacuum pump to not reach its maximum vacuum capacity.
You can buy vacuum pump oil from vacuum pump manufacturers or other suppliers. These options are available in a variety of sizes, and labels can be customized. The oil should be designed for the pump. However, you should check the manufacturer’s recommendations to avoid buying the wrong type.
If you choose to use a synthetic oil, it is important to use a good quality oil. It helps the pump work more efficiently and prolong its life.
Vacuum Pump


After choosing a suitable location, the next step is to install the pump. First, place the pump on a flat surface. Then, screw the pump onto the motor body above the check valve. Make sure the accessories are wrapped with sealing tape and secured with screws. The direction of gas inflow and outflow is indicated by arrows on the pump. The direction of rotation around the pump is also shown.
During commissioning, check the operation of each part of the pump. If the pump is equipped with a pipe connection, the pipe should be the same size and shape as the pump flange. Also, make sure that the piping does not cause any pressure drop. In addition, the first three weeks of operation require the installation of protective nets at the suction ports.
When selecting a pump, consider the back pressure of the system. Too much back pressure will affect the capacity of the vacuum pump. Also, check the temperature of the seal. If the temperature is too high, the seal may be damaged. It could also be due to a partially closed valve in the recirculation line or a clogged filter. Circulation pumps and heat exchangers should also be checked for fouling.
The vacuum pump is usually installed in the chassis area of ​​the car. They can be mounted next to the engine or on a lower support frame. They are usually fastened to the bracket using suitable shock absorbers and isolating elements. However, before installing the vacuum pump, be sure to check the vacuum pump’s wiring harness before connecting it to the vehicle.
In many experimental setups, a vacuum pump is essential. However, improperly installed vacuum pumps can expose users to harmful vapors and chemicals. Appropriate plugs and belt guards should be installed to prevent any accidental chemical exposure. It is also important to install a fume hood for the pump.
In most cases, vacuum pumps come with installation manuals and instructions. Some manufacturers even offer start-up assistance if needed.

China high quality Smart Design Pump China Chemical Dosing Pump Vacuum Pump for Chemical Industry   vacuum pump brakesChina high quality Smart Design Pump China Chemical Dosing Pump Vacuum Pump for Chemical Industry   vacuum pump brakes
editor by CX 2023-05-06