The Type CK4A Check Valves prevent backward flow of fluid in refrigerant suction, hot gas or liquid lines.

Parker’s CK4 check valves are designed to be close coupled to a control valve which will reduce overall installation length, complexity, and cost. These valves are designed to prevent backflow in a variety of refrigeration applications and can be mounted on a valve or as a standalone component. The CK4 can be mounted in any orientation when used as a standalone part of the refrigeration system. These compact valves are spring closing with a lapped, stainless steel or chrome plated seat for positive closing action and low leakage. A minimum pressure difference of 0.05 bar (0.75 psi) is required to hold the valve in the open position. Removable seat plate with combination O-ring and metal to metal knife edge seal allows the valve to be disassembled for maintenance. They may be ordered with male adapter rings for close-coupling to other Refrigerating Specialties valves.

Markets:

• Industrial Refrigeration

• Commercial Refrigeration

Features and Benefits:

• UL Listed (Thru 3” Size)

• May be installed in any position

• Compact

• Lightweight

• Inline

• Design Pressure (MRP): 34.5 bar (500 psi)

Applications:

• Re-circulating (overfeed) systems

• High speed compressor discharge

• Pump discharge

• Suction temperatures down to -45°C (-50°F)

• Hot gas lines (pan to evaporator)

• Not suitable for discharge of reciprocating compressor or economizer port of screw compressor

MAXIMUM PRESSURE (BAR)

34.5bar

MAXIMUM PRESSURE (PSIG)

500psig

MINIMUM WORKING TEMPERATURE (C)

-50°C

MINIMUM WORKING TEMPERATURE (F)

-60°F

MAXIMUM WORKING TEMPERATURE (C)

105°C

MAXIMUM WORKING TEMPERATURE (F)

220°F

PRESSURE DROP (BAR)

0.05bar or 0.04bar

PRESSURE DROP (PSIG)

0.75psig or 0.60psig

OPERATING STYLE

Spring Closing

VALVE TYPE

CK4

PORT SIZE (MM)

15mm to 80mm

PORT SIZE (INCH)

1/2″ to 8″

FLANGE TYPE

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

CONNECTION SIZE

None or 1/2″ to 8″

ADAPTER RING

No Adapter Ring or With Male Adapter Ring

VALVE MATERIAL

Standard Valve Material or Meets Pressure Equipment Directive (PED)

PLATING

No Plating, Zinc Plated, Painted- No Plating

BODY MATERIAL

Cast Steel, Cast Steel (A-352 GR, LCB), Ductile Iron (GGG-40.3)