EVP-150PB oil-free scroll vacuum pump is a dry vacuum pump successfully developed by Shanghai EVP Vacuum Technology Co., Ltd. – Vacuum Pump R&D Department in November 2021.  It has been officially mass-produced and sold in December 2021, getting very positive  feedback from clients; Thi...

Absorbed power”, also called “pump input power”, in general refers to the “active power” of the motor. And the shaft power is the work given to the pump shaft by the motor per unit time. The shaft will power (motor power) to the power of the power parts (impeller). T...

If the sealing method of the water ring vacuum pump is a gland packing seal, the user wants to change it to a mechanical seal vacuum pump. Then let’s take the 2BE1-153 water ring vacuum pump as an example, the user needs to replace the following parts: replace a new pump shaft, replace a new impe...

Corrosion has always been one of the most headache hazards of chemical equipment. A little carelessness can damage the equipment, or cause an accident or even a disaster. According to relevant statistics, about 60% of the damage of chemical equipment is caused by corrosion. Therefore, when select...

Diffusion pump pump as one of the most common high vacuum pump, its ultimate vacuum can up to 10-5Pa, but in actual use, we do not recommend using vacuum pump near ultimate vacuum for a long time, the most direct impact is that the pumping capacity will decrease dramatically, and long-term use at...

Full circulation is with a heat exchanger, and the circulating working fluid has been used repeatedly; Partial circulation means that part of the working fluid is drained then it will be supplemented accordingly; For example, one system requires the water circulation 2 m3/h, and the full circulat...

As we all know, the main sealing methods of water ring vacuum pumps are gland packing seals and mechanical seals. This article mainly shares relevant knowledge of gland packing seals. The so-called packing seal is to fill the packing into the pump for sealing. It is a very common sealing method f...

In general, screw pumps are not suitable for pumping gases with particles, but it can pumping  with particles less than 0.15 mm in diameter after adding a filter in the exhaust port of piston vacuum pump, which must be replaced and cleaned regularly. When a screw pump is used with a Roots pump fo...

The 2BE series water ring vacuum pumps produced by our company are generally equipped with air intake filters, which need to be informed in advance before placing an order. Take the 2BE1-252 water ring vacuum pump as an example. A customer once asked if the particle diameter reached 300 microns, ...

The molecular pump has a default port size. For example, the flange size of FB-2000 (2000L/s) is 250. If the customer’s equipment only has a 200-diameter, what should we do? The interface of the EVP brand FB series molecular pump can be changed to a smaller size according to the customer...