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2024 Sun Hydraulics 1 of 2
MODEL
CKCLCKCL
Pilot-to-open check valve with sealed pilot
SERIESSERIES 1 / 1 / CAPACITY:CAPACITY: 60 L/min. / 60 L/min. / CAVITY:CAVITY: T-11A T-11A
NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.
This valve is a pilot to open check valve. It has a sealed pilot, a steel seat, and is non-vented.
It allows free flow from the valve (port 2) to the load (port 1) and blocks flow in the opposite
direction. Pressure at the pilot (port 3) will open the valve from port 1 to port 2. Pilot
pressure needed at port 3 to open the valve is directly proportional to the load pressure at
port 1. Pressure at port 2 directly opposes pilot pressure.
TECHNICAL DATATECHNICAL DATA
Cavity T-11A
Series 1
Capacity 60 L/min.
Maximum Operating Pressure 350 bar
Pilot Ratio 3:1
Maximum Valve Leakage at 110 SUS (24 cSt) 0,07 cc/min.
Valve Hex Size 22,2 mm
Valve Installation Torque 41 - 47 Nm
Seal kit - Cartridge Buna: 990011007
Seal kit - Cartridge Polyurethane: 990011002
Seal kit - Cartridge Viton: 990011006
Model Weight 0.13 kg.
sunhydraulics.com/model/
CKCL
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2024 Sun Hydraulics 2 of 2
(X)(X)CONTROLCONTROL
XX Standard Pilot
LL Manual Load Release
(C)(C)CRACKING PRESSURECRACKING PRESSURE
CC 30 psi (2 bar)
AA 4 psi (0,3 bar)
BB 15 psi (1 bar)
DD 50 psi (3,5 bar)
EE 75 psi (5 bar)
FF 100 psi (7 bar)
(N)(N)SEAL MATERIALSEAL MATERIAL
NN Buna-N
VV Viton
TECHNICAL FEATURESTECHNICAL FEATURES
This 3 port pilot-to-open check valve and 3 port counterbalance valves are physically interchangeable (i.e. same cavities, same flow
path for a given frame size). However, cartridge extension dimensions from the mounting surface may vary.
Provides hose break protection, prevents loads from drifting and positively locks pressurized loads.
Extremely low leakage. The seat and poppet are heat treated for long life. If the load drifts due to the valve, the seat has probably
been damaged by contamination and the valve should be replaced.
Sealed pilot for use in circuits where cross port leakage is undesirable.
Pilot-to-open check cartridges are locking valves, not motion control valves. For motion control applications, use counterbalance
valves.
This valve is identical to a CKCD except for a high performance seal on the pilot piston.
For models with manual load release control option, turn load release clockwise to release load.
Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation
torque and/or cavity/cartridge machining variations.
PERFORMANCE CURVESPERFORMANCE CURVES
Model Code Example: CKCLXCNModel Code Example: CKCLXCNCONFIGURATION OPTIONSCONFIGURATION OPTIONS
