Number of check valves at the outlet of reciprocating compressors
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The outlet of a reciprocating compressor requires a special check valve to prevent gas backflow, and consideration is also given to preventing wear on the check valve. Currently, a check valve with a gas valve is used at the outlet of the recycle hydrogen reciprocating compressor. Is it necessary to add a second check valve to improve the reliability of backflow prevention? I’d like to ask the experts out there!
For a pressure difference of 4 MPa or more, use two outlets, one inlet, or one outlet
If you’re not in design, it’s best to understand the principles of existing equipment. Each stage outlet of a reciprocating compressor already has a check valve, so there is no need for an additional one. It’s already a mature technology; there’s no need to worry about such things, to be honest.
What was said upstairs is correct; the air valve in a reciprocating compressor is a one-way valve