Brochure

Flo-Con Pressure Regulators and Valves
Parker Hannifin Corporation
Climate & Industrial Controls Group
Cleveland, OH
301
Catalog CIC-2003-1/US
Flo-Con Pressure
Regulators
& Valves
CK4 Check Valve
Features and Benefits
• Spring-loaded, in-line check valve.
• Compact size, mounts in any position.
• A minimum pressure difference of .75 psi
(.05 bar) required to fully open valve.
• Several ODS connection sizes available for most
port size valves.
• Positive spring closing action.
• Lapped, metal to metal stainless steel or chrome
plated seat.
• Various flanged connections available.
Specifications
• Design pressure (MRP): 500 psig, (32 bar).
• Minimum fluid temperature: -40°F (-40° C).
• UL listed, file # SA5473.
• CSA certified, file # LR20991-14.
CK4 Valve Nomenclature
CK4 Port/Connection Size Combinations
Technical Information CK4 Check Valve
Flanged
Body Style
4A
Port Size
4
Check
Valve
CK
Description: CK4A check valves allow flow in one
direction only, and will prevent backward flow of
refrigerant should the outlet pressure increase even
slightly above the valve’s inlet pressure. The CK4A
check valve is a flanged spring closing valve which
utilizes a corrosion resistant, stainless steel or
chrome plated lapped seat. This material and type
of construction ensures reliable closing action and
minimum seat leakage.
Typical applications for large commercial refrigeration
systems include condenser liquid drain check valves,
and condenser bypass lines. As a bypass check
valve, it is usually installed downstream of a receiver
pressure regulator. In this application, the CK4A
check valve prevents back-flow through the receiver
pressure regulator and into the discharge line in the
event of a system shut-down.
CK4A check valves utilize mating flanges. In most
instances, ODS flanges with copper couplings
provide various connection sizes to match the valve
to the line. The flanges used are two bolt refrigeration
style (tongue and groove) on all valves up to and
including 1" (25mm) port size, and four bolt on 1-1/4"
(32mm) through 4" (100mm) port size.
Installation: Because of their spring closing con-
struction, CK4A check valves can be mounted in any
position in either a vertical or horizontal line. The
valve must be installed with the arrow pointing in the
direction of flow. After installing the CK4A between it’s
flanges, tighten the flange bolts evenly.
Ordering Guide: Specify the CK4A port size and the
connection size of the ODS flange.
Valve
Type Port Size Available ODS Flange Connection Sizes
CK4A-2 1/2" (13mm) 1/2", 5/8", 7/8" (13mm, 15mm, 22mm)
CK4A-3 3/4" (20mm) 7/8", 1-1/8", 1-3/8" (22mm, 28mm, 35mm)
CK4A-4 1" (25mm) 1-1/8", 1-3/8", 1-5/8" (28mm, 35mm, 42mm)
CK4A-6 1-1/4" (32mm) 1-3/8", 1-5/8", 2-1/8" (35mm, 42mm, 54mm)
CK4A-8 2" (50mm) 1-5/8", 2-1/8", 2-5/8" (42mm, 54mm, 66mm)
CK4A-9 2-1/2" (65mm) 2-5/8", 3-1/8" (66mm, 78mm)
CK4A-0 3" (75mm) 3-1/8", 3-5/8" (78mm, 91mm)
CK4A-16 4" (100mm) 4-1/8" (103mm)