INDUSTRIAL RELIEF VALVE (BRASS) 1/4" - 1/2" NPT 10 - 750 Psig (0.69 - 51.7 Bar) Description The Generant Series Brass IRV, Industrial Relief Valve is a spring reference over pressure protection device. The valve can be ordered with set pressures ranging from 10 to 750 Psig (0.69 to 51.7 Bar) and comes factory preset and permanently locked. Relief pressure cannot be altered or adjusted in the field. Seat and poppet geometry combined with optimized spring ranges provide high flow rates with minimum pressure accumulation. Relief pressure can be discharged to atmosphere or to a downstream connection. For severe service applications and set pressures above 50 Psig (3.45 Bar), specify optional PTFE seals. Supplied Factory Preset Set and Permanently Locked for Tamper Proof Service 100% Factory Tested for Leakage, Crack and Reseal Performance High Flow Capacity and Excellent Reseal Performance Discharge to Atmosphere or Inline Piping Configurations Optional Deflector Cap available for Diverting Exhausted Gas to Atmosphere Available Cleaned and Packaged for Oxygen Service Technical Data Set Pressure Range: FKM and Fluorosilicone: 10 - 750 Psig (0.69 to 51.7 Bar) PTFE and PCTFE: 50 - 750 Psig (3.45 to 51.7 Bar) Factory Set Tolerance: +/- 5% of Specified Pressure Zero Leakage to 95% of Set Pressure Full Rated Flow @ 110% of Set Pressure, unaffected by up to 10% Back Pressure Reseal: 90% of Set Pressure PTFE seals 80% of Set Pressure Temperature Rating: -320º F to 375º F (-196º C to 190º C) based on seal material (see how to order) Lubricant: Krytox Materials of Construction Component Body, Poppet, Seat Rivet, Spring Retainer, In-Line Adapter* Adjustment Spring Seals CDA 360 Brass, ASTM B16 302 or 17-7 PH Stainless Steel, ASTM A313 FKM, PTFE, PCTFE, Fluorosilicone *In-line Adapters Utilize FKM O’Ring Seals Series IRVI

INDUSTRIAL RELIEF VALVE (BRASS) Flow Pipe Size (NPT) 1/4” 3/8” 1/2” IRV – 250B - V – 300 - X SERIES IRV Vent to Atmosphere IRVI2 1/4" Female NPT In-Line Adapter IRVI3 3/8" Female NPT In-Line Adapter IRVI4 1/2" Female NPT In-Line Adapter IRVD Deflector Cap INLET PIPE SIZE (NPT) 250B - 1/4" Male 375B - 3/8" Male 500B - 1/2" Male SEAL MATERIAL V – FKM, -20° F to 375° F (-29° C to 190° C) T – PTFE, -60° F to 375° F (-51° C to 190° C) K – PCTFE, -320° F to 200° F (-220° C to 93° C) FS – Fluorosilicone, -80° F to 350° F (-62° C to 176° C) Specify Set Pressure 10-750 Psig (0.69 to 51.7 Bar) for Seal...