Technical Specifications / Parameters Parameter Specification Model Fisher Type RPE Type Pilot-Operated, Full-Nozzle, Safety Relief Valve Size & Pressure Class Sizes: 1D (1"x2") through 6T (6"x8") and larger. Inlet/Outlet: Standardly complies with API 526 flanged connections (D through T). Pressure Class: ANSI Classes 150, 300, 600, 900, 1500, 2500. Set Pressure Range Typically from 15 psig to 6000 psig (1 bar to 414 bar), depending on the specific pilot and main valve design. Temperature Range Standard: -450°F to +1000°F (-268°C to +538°C), depending on pilot and body materials. Body Materials Carbon Steel (WCB), Stainless Steel (CF8M), Alloy Steels (WC6, WC9). Trim Materials Stainless Steel (standard), other alloys available. Pilot Options • Standard Pilot: For general purpose gas/vapor and liquid service. • Bellows Pilot: For variable or high superimposed backpressure. • Soft Seat Pilot: For bubble-tight shutoff. • Liquid Pilot: Optimized for liquid applications. • T&P Pilot: For thermal relief. Blowdown Adjustable, typically from 2% to 20%. Certifications Can be certified to meet API 520/526/527, ASME Boiler and Pressure Vessel Code, Section VIII, and PED requirements.