Key Parameters (English) The following are typical technical parameters for the Fisher 912 Regulator. Category Parameter Description / Typical Values Pressure Ratings Maximum Inlet Pressure (P1) 400 psig (28 bar). Outlet Pressure (P2) Range Highly configurable via pilot selection. Common ranges span from a few inches w.c. up to 175 psig (e.g., 0.87 kPa to 12 bar). Capacity Flow Coefficient (Cv) High Cv values. For example, a 2" size can have a Cv of approximately 65. Size & Connections Pipe Size 3/4 inch to 4 inches. End Connections Threaded (NPT) or Flanged (ANSI Class 125, 150, 250). Materials Body Material Cast Iron (standard). Internal Trim Stainless Steel. Pilot & Safety Pilot Types Reducing Pilot, Monitor Pilot. Overpressure Protection (OPP) Internal Relief Valve is a common optional feature. Can also be used with external Slam-Shut Valves. Environment Operating Temperature Standard for outdoor gas service (e.g., -20°F to 150°F / -29°C to 66°C).
