Operation of a pressure control valve if reverse flow is expected
Operation of a pressure control valve if reverse flow is expected
(OP)
Say we have a pressure control valve which is designed to control the upstream pressure in a line at a certain value say 5 bar. Flow is normally from left to right and the upstream pressure is normally higher than the downstream pressure. Now if the downstream pressure becomes higher than the upstream pressure such that the flow is reversed (ie. from right to left), what is the pressure control valve supposed to do? Does it switch to a downstream controller? Or does it block reverse flow? Or does it just stay fully open?





RE: Operation of a pressure control valve if reverse flow is expected
Does depends on type of valve. Some don't like reverse flow and can fail or jam in reverse flow mode. Normally you put two nrvs, one to prevent flow through the valve and the second to allow bypass flow if that's what you want.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Operation of a pressure control valve if reverse flow is expected
Best regards, Morten
RE: Operation of a pressure control valve if reverse flow is expected
RE: Operation of a pressure control valve if reverse flow is expected
RE: Operation of a pressure control valve if reverse flow is expected
Missing information here from Adack, seems that this is question about an existing loop.
What is the purpose of the question?
If general it is already answered, if a question of help with layout or designed more details are needed.
RE: Operation of a pressure control valve if reverse flow is expected
the pressure measurement only sees pressure,the valve operation only does what it is designed to do
so if pressure rises as a result of pressure rise downstream, the valve opens