CYLINDER CHECK CYLINDER CHECK VALVE 3/8" - 1/2" NPT x CGA 540 or 580 0-3000 PSIG Description The Cylinder Check Valve is used on the gas use outlet of industrial cryogenic liquid cylinders to prevent back flow into the cylinder. The optional “Tamper Evident Restraint” provides a visual indication if removal of the connection has been attempted. Available in CGA 540 & 580 configurations. Features • Compact and rugged one piece body construction • Optional “Tamper Evident Restraint” - lock wire and lockout tag • Provides visual evidence of compliance • High flow design exceeds maximum cylinder output • Supplied cleaned and bagged for Oxygen Service • 100% Factory Tested for leakage • GLT Low Temperature Viton™ Seal Technical Data • Nominal Crack Pressure: 1 Psig (0.07 Bar) • External Leakage: Zero leak • Internal Leakage: Zero leak at 0.5 PSIG (0.03 bar) Back Pressure • Cv (flow coefficient): 0.65 • Maximum Pressure: 3000 PSIG @ 150° F (206 bar @ 66° C) • Proof Pressure: 5,000 PSIG (345 bar) Materials of Construction Component Body, Poppet, Seat Insert, Seat Locking Screw Spring Phosphor Bronze, ASTM B159 O’Ring Seal* *Lubricated with Krytox™ GPL-205

CYLINDER CHECK VALVE Ordering Information OPC – 3 540 – V - 1 – T TAMPER EVIDENT T – Tamper Evident Note: Omit if not required SERIES OPC – One Piece Check CRACK PRESSURE 1 – 1 PSI Nominal Note: Only available in 1 PSI Crack Pressure INLET PORT 3 – 3/8" Male NPT 4 – 1/2" Male NPT Note: Port Threads into Outlet of Gas Use Shut-Off Valve OUTLET PORT 540 – CGA 540 Connection 580 – CGA 580 Connection Note: VitonTM and KrytoxTM are trademarks of DuPont. PROPER COMPONENT SELECTION – When specifying a component, the total system design must be considered to ensure safe and trouble-free performance....