Non-return Valve Selection
Non-return Valve Selection
(OP)
What are the key criteria for selection of a non-return valve for the use in a high pressure liquid stream (>45 bar)?
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Non-return Valve Selection
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RE: Non-return Valve Selection
Then you will wish to select your material to be compatible with the process fluid.
Determine the type of check, or nonreturn, valve you wish to use:
Ball check
Swing check,
Wafer check
Piston check
GLobe nonreturn valve
there are others.
Specify the connection you need: wafer, flanged, socketweld, NPT, etc,
Does the valve need antislam feature (Spring-loaded closed)
Is the valve to be installed in a horizontal pipe (easiest) or a vertical pipe flowing upwards (more difficult) or a vertical pipe flowing downwards (really difficult)
Must the valve have resilient seats for tight shutoff, or are metal-to-metal seats acceptable?
This ought to get you started.
RE: Non-return Valve Selection
You mentioned on the type of non-return valve to use. What are the advantages of using a piston type?
The application for my plant is in a horizontal pipe. Resilient seats are expected, rather than metal-to-metal.
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RE: Non-return Valve Selection
I googled piston check valves and hit this page:
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RE: Non-return Valve Selection
Can you describe a "globe non-return" valve? Thanks.
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RE: Non-return Valve Selection
I also see this type of valve referred to as a stop-check.
RE: Non-return Valve Selection
"Do not worry about your problems with mathematics, I assure you mine are far greater."
Albert Einstein
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Non-return Valve Selection
Example: are these required?
Pressure
Fluid type
etc
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RE: Non-return Valve Selection
RE: Non-return Valve Selection
Thanks for the info. We'll keep that in mind for our application.
But I need to clarify my question. I'm now selecting a check valve for another different application. It's no longer for a high-pressure flow, but for normal flows. We have been using disc-check valves for this, but I was wondering if the disc-check was the correct valve to begin with.
Whether it is or not, therefore my question is on the selection criteria of a check valve. What are the considerations that you would take to decide which type of non-return valves to be used: examples disc-check valve, swing check valves, piston check valves, dual-plate check valves etc.
Also, is there a comprehensive online resource that I can refer regarding this topic?
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