Pressure Reducing Valve Sizing and Selection Guide
Pressure reducing valves (PRVs) hold downstream pressure at a setpoint independent of upstream swing, with globe-pattern diaphragm-pilot models like the Cla-Val 90-21 covering 250-400 psi at 180 °F (82 °C). Sizing turns on inlet/outlet pressure ratio, Cv at the chosen setpoint, and required flo
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