IntroductionCIR-LOK O-Ring check valves with single-ferrule compression sleeve connection type. Provide unidirectional flow and tight shut-off for liquids and gases with high reliability. When differential drops below cracking pressure, valve shuts off. CIR-LOK Ball check valves prevent reverse flow where leak-tight shut-off is not mandatory. When differential drops below cracking pressure, valve closes.With all-metal components, valve can be used up to 650°F(343°C).
FeaturesViton (FKM) O-ring: 0° to 400°F (-18° to 204°C)Buna-N O-ring: 0° to 250°F (-18° to 121°C))FFKM O-ring: 30° to 500°F (-18° to 260°C)PTFE O-ring: -100° to 400°F (-73° to 204°C)PTFE O-ring with Low Temp Spring: to -100°F (-73°C)Ball and poppet are an integral design to assure positive,in-line seating. Poppet is designed essentially for axial flow with minimum pressure drop
AdvantagesCracking Pressure: 20 psi (1.38 bar) ±30%. Springs for higher cracking pressures up to 100 psi available on special order for O-ring style check valves onlyCracking Pressure: 20 psi (1.38 bar) +/- 30% Optional cracking pressures not available in Ball Style Check ValvesInstallation: Vertical or Horizontal as required. Flow Direction Arrow marked on valve body.
More OptionsOptional Monel, Inconel 600, Titanium Grade 2, Hastelloy C276, Inconel 625, and Incoloy 825Optional ball type check valves