Key Parameters Category Parameter Name Description & Typical Values Valve Specifications Valve Size 1/2" to 6" (DN 15 to DN 150) - Extensive size range. End Connections Flanged (ANSI 125, 150, 200, 300, 600 lbs), Screwed (NPT), Socket Weld. Body Materials Cast Iron (Std.), Ductile Iron, Carbon Steel, Stainless Steel, and other alloys. Pressure Ratings Maximum Inlet Pressure Up to 4000 psig (276 bar) for high-pressure bodies. Varies by body type and material. Outlet Pressure Range (R622/R642) Adjustable via spring. Dozens of spring ranges available, from very low (e.g., 5-50 psig / 0.3-3.4 bar) to very high (e.g., 500-1500 psig / 34-103 bar). Back-Pressure Setting Range (R652) Adjustable via spring, with a wide selection of ranges similar to the reducing valves. Internal Parts (Trim) Trim Styles Single-port (Std.) or Cage-style (for guided stability, easy maintenance). Trim Characteristics Quick Opening (Std.) or Linear & Equal Percentage (available for cage-style trim). Trim Materials Stainless Steel (Std.), Carbon Steel, Stellite, Hastelloy, etc. Soft Seat (PTFE) option for tight shut-off (Class IV/V). Diaphragm Material Reinforced Elastomer (NBR std.), PTFE, or Metal. Performance Flow Characteristic Quick-opening (standard single-port), Linear or Equal Percentage (cage trim). Leakage Class Class II (metal-to-metal seat, standard). Class IV or V (with optional soft seat). Temperature Limits Standard: -20°F to 150°F (-29°C to 66°C) with elastomer diaphragm. Up to 1000°F+ (538°C+) with special components (asbestos-free packing, metal diaphragm, etc.).
