High pressure relief valve
1/4 - 1", 10 500 psig | 5300 series
Circle Seal Controls
O-ring Materials Buna N, neoprene, and Viton®
Poppet Materials • Liquid service: CRES 440C
• Gas service to 3074 psi: PCTFE
• Gas service above 3074 psi: Polyimide (Vespel®)
Retainer Stem 303 stainless steel
Seat Material 17-4 PH stainless steel
Spring Material 17-7 PH stainless steel
Backup Rings Tefl on®
Operating Pressure 400 to 10,500 psig (28 to 724 bar); specify cracking
pressure
Proof Pressure • Gas: 4500 psig (PCTFE); 10,500 psig (Polyimide)
• Liquid: 16,000 psig
Burst Pressure • Brass: over 30,000 psig (2068 bar)
• Stainless steel: over 40,000 psig (2758 bar)
Temperature Range −65° F to +350° F (−54° C to +177° F)
Based on O-ring & body material, see "How to Order"
Connection Sizes • ¼˝ to ½˝ female pipe
• ¼˝ to 1˝ female tube
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