Function of exhaust valve in rotary vane vacuum pump
The exhaust valve plate of rotary vane vacuum pump is made of rubber pad. The exhaust valve plate needs to be immersed in the pump oil. During the exhaust process of vacuum pump, compressed air pushes open the valve plate, and the gas passes through the valve plate and exhausts. The vacuum pump oil plays a sealing role. Generally speaking, the valve plate is used to block the small hole on the disc when the vacuum pump is working. If it is broken, the small eye of the vacuum pump will leak all the time when the vacuum pump is pumping, which will not achieve the effect, and the vacuum degree will be reduced.
Some users don't like to install the valve at the suction port of the vacuum pump. They think that the vacuum pump can work well without the valve. The exhaust valve is the working part in the pump. The negative pressure of the system makes the valve plate in a tight state all the time, so the valve plate is easy to be strained, so that the service life of the pump is greatly reduced, and at the same time, the maintenance cost is not small. This problem can be avoided by installing a valve in the suction port.
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industrial vacuum pumps,vacuum furnaces