Key Parameters Category Parameter Description / Typical Values Pressure Ratings Maximum Inlet Pressure (P1) Up to 400 psig (28 bar) for standard models. Outlet Pressure (P2) Range Configurable via pilot selection. Designed for a wide range of outlet pressures. Capacity Flow Coefficient (Cv) High Cv values. For example, a 6" H120 can have a Cv of over 1000. Accuracy & Droop Excellent, typically within ±1-2% of the set point due to the pilot-operated design. Size & Connections Pipe Size 2 inches (DN50) to 12 inches (DN300). End Connections Flanged (ANSI Class 150, 300, 400). Materials Body Material Cast Iron or Ductile Iron. Trim Materials Stainless Steel. Pilot & Safety Pilot Types Reducing Pilot, Monitor Pilot, Dome-Loaded Pilot. Safety System Often installed upstream with a Fisher PSL or PSS Slam-Shut Valve for critical overpressure protection. Environment Operating Temperature Standard: -20°F to +150°F (-29°C to +66°C).
