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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.
Features
  • Manual Opening Stem 
  • Low Pressure Drop 
  • Piston Type Gravity Closing 
  • Flanged 
  • Design Pressure (MRP): 27.6 bar (400 psig) 
  • Rugged; Heavy Duty

Specifications

Adapter Ring

  • No Adapter Ring or Male Adapter Ring

Connection Size

  • None or 3/4" to 6"

Connection Type

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

Maximum Rated Pressure (bar)

  • 27.6 bar

Maximum Rated Pressure (psig)

  • 400 psig

Model Number

  • Please Configure Part for Model Number

Piston Type

  • Standard or .109 Piston

Plating

  • No Plating

Port Size (inch)

  • 3/4" to 6"

Port Size (mm)

  • 20 mm to 150 mm

Strainer Type

  • No Strainer or Strainer

Valve Material

  • Standard Valve or Meets Pressure Equipment Directive (PED)

Valve Type

  • CK1 or CKS

  • 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)

Documentation

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