Back Pressure Valves
Norriseal-Wellmark’s Back Pressure Valves can be used in any installation where upstream pressure is required to be kept at a preset range. Back pressure valves may also be used as: a pressure relief valve, a custody transfer dump valve to hold a certain back pressure, or as a separator back pressure valve on the gas or liquid side.
3535 Diaphragm Operated Back Pressure Valve, Low Pressure, Single Seat
5555 Back Pressure Valve, Double Seated (Balanced)
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