Check valve position issue
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The position of the check valve after pumping is pump-check valve-stop valve； Or pump-stop valve-check valve ； Are there any relevant regulations?
For ease of maintenance, it is usually pump – check valve – globe valve
Pump check valve and globe valve: Check valves generally are not subjected to pressure for long periods of time; if there is static pressure, the globe valve should be closed
Generally, it is pump – check valve – valve
Pump-check valve-stop valve, easy to maintain
Pump outlet – check valve – isolation valve; a pressure gauge is installed between the pump outlet and the check valve, while a drain line is placed between the check valve and the isolation valve
None of them mentioned the standard name.
Under normal conditions, it is pump-check valve-stop valve