双板止回阀的安装要求
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BEST PRACTICE VALVE INSTALLATION
PINS TO BE VERTICAL
VERTICAL PIPE WITH FLOW DOWN UP TO & INCLUDING 8”WITH STANDARD SPRING
VERTICAL PIPE WITH FLOW UP
HORIZONTAL PIPE
5 DIAMETERS MINIMUM FROM REDUCER/EXPANDER TO VALVE
AFTER VALVE TO REDUCER
2 DIAMETERS MINIMUM FROM VALVE TO VALVE
2 DIAMETERS MINIMUM AFTER VALVE TO BEND
Check valve should be installed a minimum of 5diameters downstream of a reducer/expander to ensure that the valve is in laminar and not turbulent flow.
Piping components such as pumps, compressors, valves, reducers, bends, elbows, orifice plates, all create turbulent flow. To maximise the life of a check valve, any type of check valve, it should be installed as detailed below to ensure the valve is in non-turbulent flow.
For non-horizontal flow directions, specific system dynamics will be required. Refer to Goodwin.
Check valves should be installed a minimum of 5 diameters upstream of a reducer or bend to avoid choked flow
preventing full opening of the check valve.
Goodwin Check Valve
2 DIAMETERS MINIMUM AFTER VALVE TO BEND
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