CK-1A0C33NNSN Refrigerating Specialties (RS) 4 CK-1, 4-1/8 Copper

Parker's CK1 check valves provide safe and effective backflow prevention for a variety of refrigeration applications. The gravity closing feature makes these valves ideal for systems that use a VFD or compressor unloading feature to reduce capacity as they can tolerate load fluctuations better than alternative check valve technologies. All CK1 check valves are flanged and have a manual opening stem for manual operation. The 20-32 mm (3/4 - 1-1/4") port size valves have a PTFE seat; larger valves have a metal to metal seat. A minimum pressure difference of .03 bar (0.5 psi) is required to open the valve. Features and Benefits:Manual Opening StemLow Pressure DropPiston Type Gravity ClosingFlangedDesign Pressure (MRP): 27.6 bar (400 psig)Rugged; Heavy DutyApplications:Compressor Discharge LinesLiquid Lines with temperatures as low as -30°C (-25°F)Suction Line with temperatures as low as -30°C (-25°F)