The Forbes Marshall Pilot Operated Pressure Reducing Valve, FMPRV41 is an SG Iron Pressure Reducing Valve (pilot operated) suitable for steam or compressed air.
The FMPRV41 controls the pressure by sensing the downstream pressure through a pressure sensing pipe taken to the union (item L) or through the internal sensing pipe (item M). Fitting of the external pressure sensing pipe is described in the user manual supplied with the valve.
Note: Capacity is reduced and there is a possibility of hunting if an external pressure sensing pipe is not fitted.





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