 2025 Sun Hydraulics 1 of 2

MODEL

CKCRCKCR

5:1 pilot ratio, pilot-to-open check valve with standard pilot

SERIESSERIES 1 / 1 / CAPACITY:CAPACITY: 60 L/min. / 60 L/min. / CAVITY:CAVITY: T-11A T-11A

(X)(X)CONTROLCONTROL

XX Standard Pilot

BB External 1/4 BSPP Pilot Port,

Port 3 blocked

CC Manual Load Release - Tamper

Resistant

EE External 4-SAE Pilot Port, Port 3

Blocked

LL Manual Load Release

PP External 1/4 NPTF Pilot Port,

Port 3 Blocked

(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)

ZZ 1 psi (0,07 bar)

(N)(N)SEAL MATERIALSEAL MATERIAL

NN Buna-N

VV Viton

MATERIAL/COATINGMATERIAL/COATING

Standard Material/Coating

/AP/AP Stainless Steel, Passivated

/LH/LH Mild Steel, Zinc-Nickel

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

This valve is a pilot to open check valve. It has a non-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 5:1

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/

CKCR

Model Code Example: CKCRXCNModel Code Example: CKCRXCNCONFIGURATION OPTIONSCONFIGURATION OPTIONS

 2025 Sun Hydraulics 2 of 2

TECHNICAL FEATURESTECHNICAL FEATURES

Provides hose break protection, prevents loads from drifting and positively locks pressurized loads.

Standard unsealed pilot allows air trapped in the pilot line to be purged from the circuit.

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.

Optional external porting out of the hex end of the cartridge is available for external piloting. In this configuration, port 3 is blocked.

See Control options E, and P.

Pilot-to-open check cartridges are locking valves, not motion control valves. For motion control applications, use counterbalance

valves.

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.

For models with manual load release control option, turn load release clockwise to release load.

Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP

for external stainless steel components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all

options. For further details, please see the Materials of Construction page located under TECH RESOURCES.

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.