Refrigerating Specialties Division
1
BULLETIN 50-25B
Type CK-6D
CK-6D
Fig 1
Dual Position
Gas Powered
Suction
Stop Valve
Type CK-6D
Port Size: 50mm to 100mm (2” – 4”)
For Ammonia, R-22 and
other common Refrigerants
Features
• Economical Solution to Evaporator Equal-
ization after Defrost
• Low Pressure Drop
• Heavy Return Spring
• Manual Opening Stem
• Integrated S6B pilot solenoids
• Standard Coil Housing Meets NEMA 3R
and 4 - Rain Tight
• Normally Open
• Maximum Rated Pressure (MRP): 27.6 bar
(400 psig)
Description
The CK-6D is based on the same valve body, principles,
and length dimension as the standard CK-5 valves
making for easy field replacements. This heavy duty
gas-powered valve is suitable for ammonia, R-22,
and other refrigerants, certain oils and other fluids
approved for use in refrigeration. The CK-6D is a pilot
operated, dual-position valve. This valve is equipped
with a manual opening stem and A2D pressure pilot.
The CK-6D is a normally open valve and will open
remain open if open on power failure or open to it's
intermediate position if closed on power failure and
the inlet pressure exceeds the set point.
The Type CK-6D Gas-Powered Valve is furnished with
FPT Internal NPT (U.S. Standard Taper Pipe Thread),
Socket Weld, Weld Neck or ODS (solders over cop-
per tubing of given diameter) connections. The valve
may be easily removed from between the flanges for
servicing.
Purpose
These valves are employed as low pressure drop,
gas-powered suction stop valves for low temperature
evaporators. Because of the return spring, there is no
line pressure drop required to open the valve during
refrigeration. This allows for a minimal pressure drop
November 2006
Installation, Service and Parts Information
311447
I S O 9 0 0 1 - 2 0 0 0 C E R T I F I E D
Solenoid #2
Solenoid #1
Primary
Piston
Secondary
Piston