Roots vacuum pump pre-pump principle of matching

In general, the principle of an optional Roots vacuum pump is as follows:
1, Requires pre-pump caused by the main pump work required for the pre-vacuum conditions.
2, the maximum allowable discharge pressure of the main pump, the former pump must discharge the maximum amoun

Safety return valve overview

Safety valve in the system play a safety role. When the system pressure exceeds the specified value, the safety valve Ting open, the system part of the gas into the atmosphere, the system pressure does not exceed the allowable value, so as to ensure that the system is not over pressure and acci

Float flowmeter

Floater flowmeter, also known as rotameter, is a type of variable area flowmeter. In a vertical conical tube that expands from bottom to top, the gravity of a float with a circular cross-section is subjected to liquid power. The float can be The cone rises and