Regarding check valves
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Is there a ultra-low-pressure check valve? It is a check valve that allows gases with very low pressure to pass through, just like the air valves in reciprocating machines. I’m seeking help from all friends: it’s used at the outlet of the flare tank; a small amount of low-pressure gas is released to the low-pressure system, and it’s also necessary to prevent backflow when other devices are flaring. Can ordinary check valves fail to open due to too low pressure (slightly above atmospheric pressure), resulting in pressure buildup? Thank you all for your help
Inside the torch tube, it should be slightly positive pressure, right? The operating pressure of this check valve must be greater than this slight positive pressure.
The pressure in the flare tank can be slightly higher than that in the low-vapor-pressure system