Overpressure Ring, KF-40 Vacuum Fittings, ISO-KF Flange Size NW-40, Stainless Steel

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Overpressure Ring, KF-40 Vacuum Fittings, ISO-KF Flange Size NW-40, Stainless Steel This overpressure ring fits over the Outer Diameter of a KF40 Centering ring with O-Ring. Use to retain O-Ring when system is used at internal pressure over atmosphere. Overpressure Ring KF40 ISO-KF Flange Size: NW-40 Maximum Pressure: 75 psig