Roots vacuum pump equipment The power required to compress the gas is proportional to the pressure difference. Once the gas pressure difference is too high, the Roots pump may be overloaded, causing the motor winding to burn out. There are mainly the following methods to solve the overload problem of Roots vacuum pump equipment:

　　1. Adopt mechanical automatic pressure regulating bypass valve

　　The bypass valve is installed on the bypass line between the outlet and inlet of the Roots vacuum pump equipment. This valve controls the differential pressure between the pump inlet and outlet not to exceed the rated value. When the pressure difference reaches the rated value, the valve is automatically opened by the pressure difference, so that the outlet and the inlet of the Roots pump are connected, and the pressure difference between the inlet and outlet is rapidly reduced. At this time, the Roots pump works under a load with almost no pressure difference.

　　2. Adopt hydraulic coupling

　　The use of hydraulic coupling can also prevent the overload of the pump, so that the pump can work under high pressure difference. The hydraulic coupling is installed between the pump and the electric motor. The maximum differential pressure of Roots vacuum pump equipment is determined by the maximum torque delivered by the hydraulic coupling, which is regulated by the amount of liquid in it.

　　3. Use vacuum electrical components to control the inlet pressure of the pump

　　Install pressure sensitive components such as vacuum capsule relays or electrical contact vacuum pressure gauges at the inlet pipeline of Roots vacuum pump equipment. After the vacuum system is started, when the pressure at the inlet of the Roots pump is lower than the given value, the pressure sensitive element sends a signal to turn on the Roots pump through the electrical control system.