Technical Specifications Category Specification Type Conventional Spring-Loaded, Full-Lift Safety Relief Valve Service Steam, Air, Gas, and Liquid (depending on specific configuration and certification) Design & Certification ASME Section VIII (UV Stamp available) Orifice Size & Area Various sizes from D (0.110 in²) to T (1.838 in²) and larger, per ASME/API standards. Size & Connections Inlet: 1" to 3" (25 mm to 80 mm) Outlet: Typically larger than inlet. Flanged (150# to 600# RF/RTJ) or threaded (NPT) depending on model. Set Pressure Range Varies widely by orifice size and spring. Available from a few psig up to several hundred psig. Specific spring ranges must be selected. Temperature Range Standard springs up to 450°F (232°C). High-temperature springs and designs are available for higher temperatures. Body Materials Carbon Steel (WCB, Standard), Stainless Steel (CF8M), and other alloys. Trim Materials Stainless Steel (standard) Adjustable Blowdown Yes, via an external modulated blowdown ring. Max. Allowable Overpressure 10% for compressible fluids (ASME Code), or 25% for fire case, depending on certification.
