1. Dry screw vacuum pump

Dry screw vacuum pump, is the use of a pair of screw, made in the pump shell synchronous high-speed reverse rotation of the effects of the suction and exhaust and suction device, two screw fine dynamic balancing correction, and is supported by bearings, is installed in the pump shell, screw and has a certain gap between the screw, so the pump is working, no friction between each other, smooth running, low noise, working cavity without lubricating oil, therefore, dry screw pump can pump in addition to containing a large amount of water vapor and a small amount of dust gas occasions, limiting vacuum is higher, lower power consumption, energy saving, maintenance free, etc. It is the replacement of oil seal/water ring/jet vacuum pump.

 

2. Oil-free reciprocating vacuum pump

Oil-free reciprocating vacuum pump by reciprocating movement of the piston to make the pump chamber (cylinder) the working volume of periodic change to extract air vacuum pump, also known as the piston vacuum pump. The structure of reciprocating vacuum pump is similar to reciprocating piston compressor. When working, the suction pipe is connected to the vacuum vessel, and the exhaust pipe is directly to the atmosphere. Reciprocating vacuum pump can be used for vacuum distillation, vacuum concentration, vacuum crystallization, vacuum filtration, vacuum drying and concrete vacuum operation, etc.

 

3. Claw vacuum pump

Claw type vacuum pump is composed of multi-stage rotor, each level is composed of two rotor, two rotor rotating in the opposite direction, inspiratory mouth connected with the pump cavity, pump cavity volume larger and breathe in, breathe in when the rotor closed suction end, pump cavity size and compressed gas, after when the exhaust vent on the pump chamber, the exhaust mouth is closed, the exhaust end, such a cycle.

 

4. Oil-free scroll vacuum pump

The vortex disc of the oil free vacuum pump is one end connected with a plane and one or several involute helices form a vortex disc structure. A pair of vortex disks composed of a stationary vortex disk and a moving vortex disk constitute the basic structure of the vortex oil-free vacuum. For example, in a two-stage vortex oil-free vacuum pump, there are two fixed vortex disks corresponding to each direction, a rotating vortex disk located between the two vortex disks. The relative movement of dynamic and static vortices forms a crescent shaped vacuum chamber with constantly changing volume, which enables the gas to be inhaled from the air outlet, discharged from the air outlet and complete the exhaust circulation.