Key Parameters Category Parameter Name Description & Typical Values Valve Specifications Valve Size 1/2" to 3" (DN 15 to DN 80) End Connections Flanged (ANSI 125/250/300 lbs), Screwed (NPT), or others Body Materials Cast Iron, Ductile Iron, Carbon Steel, Stainless Steel Pressure Ratings Maximum Inlet Pressure Up to 4000 psig (275 bar), depending on size and body material Outlet Pressure Range Adjustable via spring. Various spring ranges are available, e.g., 3 to 125 psig (0.2 to 8.6 bar), 50 to 300 psig (3.4 to 20.7 bar), etc. Pressure Class ANSI Class 125, 150, 300, etc. Internal Parts (Trim) Trim Materials Stainless Steel, Carbon Steel, and other alloys depending on the service. Diaphragm Material Reinforced Elastomer (e.g., NBR) or PTFE for corrosive services. Performance & Environmental Flow Characteristic Quick-opening (standard). Other characteristics may be available. Leakage Class Class II (standard) or Class IV (with soft seat). Temperature Limits Standard: -20°F to +150°F (-29°C to +66°C) with elastomer diaphragm. Higher temperatures possible with specific materials (e.g., PTFE). Configurations Control Action Pressure Reducing: Direct-acting (fails to close). Back-Pressure Relief: Direct-acting (fails to open).