The Type CK1 Check Valves prevent backward flow of fluid in refrigerant suction, hot gas or liquid lines.

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.

Markets:

• Industrial Refrigeration

• Commercial Refrigeration

Features and Benefits:

• Manual Opening Stem

• Low Pressure Drop

• Piston Type Gravity Closing

• Flanged

• Design Pressure (MRP): 27.6 bar (400 psig)

• Rugged; Heavy Duty

Applications:

• Compressor Discharge Lines

• Liquid Lines with temperatures as low as -30°C (-25°F)

• Suction Lines with temperatures as low as -30°C (-25°F)

MAXIMUM RATED PRESSURE (BAR)

27.6bar

MAXIMUM RATED PRESSURE (PSIG)

400psig

VALVE TYPE

CK1 or CKS

PORT SIZE (MM)

20mm to 150mm

PORT SIZE (INCH)

3/4″ to 6″

CONNECTION TYPE

FPT, Socket Weld, No Flange, Weld Neck, ODS

CONNECTION SIZE

None or 3/4″ to 6″

STRAINER TYPE

No Strainer or Strainer

ADAPTER RING

No Adapter Ring or Male Adapter Ring

VALVE MATERIAL

Standard Valve or Meets Pressure Equipment Directive (PED)

PLATING

No Plating

PISTON TYPE

Standard or .109 Piston