Key Parameters Category Parameter Name Description & Typical Values Valve Specifications Valve Size 1/2" to 3" (DN 15 to DN 80) End Connections Screwed (NPT) or Flanged (ANSI 125/150/300 lbs) Body Materials Cast Iron (Standard), Ductile Iron, Carbon Steel, Stainless Steel Pressure & Vacuum Ratings Maximum Inlet Pressure Varies by model. Can be up to 400 psig (28 bar) or higher for some models. Pressure Setting Range Adjustable via spring. Various ranges available across the series, e.g.: • P313/P314 (Reducing): 5-200 psig (0.3-14 bar) ranges. • P323 (Back-Pressure): 5-150 psig (0.3-10 bar) ranges. • P340 (Vacuum Breaker): 0.5-10 inches Hg Vacuum (1.7-34 kPa Vacuum). Pressure Rating ANSI Class 125, 150, 300, etc., depending on body and connections. Internal Parts Trim Materials Stainless Steel (Standard poppet and seat). Other materials available. Seat Seal Metal-to-Metal (standard) or Soft Seat (Elastomer) for tighter shut-off. Performance & Environmental Leakage Class Class II (standard metal seat). Class IV (with optional soft seat). Temperature Limits Standard: -20°F to 150°F (-29°C to 66°C). Higher temperatures possible with specific components.
