zjb series roots vacuum pump

Roots vacuum pump (abbreviation: Roots pump) refers to a kind of variable capacity vacuum pump with two leaf-shaped rotors that rotate synchronously in opposite directions in the pump. There is a small gap between the rotors and the inner wall of the rotor and the pump housing without contact with each other.
Roots vacuum pumps have been tested for long-term operation in petroleum, chemical industry, plastics, pesticides, steam turbine rotor dynamic balancing, aerospace space simulation and other devices, so they should be vigorously promoted and applied in China.At the same time, it is also widely used in petroleum, chemical, metallurgical, textile and other industries.Vacuum pump accessories are used as vacuum pump silencers for noise control of vacuum pumps.

Summarize
ZJ, ZJB type Roots vacuum pump is a rotary variable displacement vacuum pump, also known as mechanical booster pump, is currently obtained in the middle and high vacuum of one of the main pumping equipment, its working principle is similar to Roots blower, is the use of two "8 "type rotor, synchronous rotation in the pump housing, from and complete the suction and exhaust.
The difference between ZJB type with relief valve Roots vacuum pump and ZJ type Roots vacuum pump is that ZJB type pump inlet and exhaust are connected, and a self-weight valve is installed vertically on the channel, which is used to keep the pressure difference between exhaust and intake in a controllable value, which is the maximum pressure difference allowed when the pump can be operated. Therefore, this valve is actually an overload automatic protection valve.