Created on 10/27/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
CKCA
Pilot-to-open check valve with standard pilot and Delrin seat
SERIES 1 / CAPACITY: 60 L/min. / CAVITY: T-11A
This valve is a pilot to open check valve. It has a non-sealed pilot, a Delrin 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, allowing flow 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 DATA
Cavity T-11A
Series 1
Capacity 60 L/min.
Pilot Ratio 3:1
Maximum Operating Pressure 175 bar
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.
(X)CONTROL
X Standard Pilot
L Manual Load Release
(C)CRACKING PRESSURE
C 30 psi (2 bar)
A 4 psi (0,3 bar)
B 15 psi (1 bar)
D 50 psi (3,5 bar)
E 75 psi (5 bar)
F 100 psi (7 bar)
(N)SEAL MATERIAL
N Buna-N
V Viton
snhy.com/
CKCA
Model Code Example: CKCAXCNCONFIGURATION OPTIONS
Created on 10/27/2016
c
2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
TECHNICAL 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.
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.
The Delrin seat is suitable for dirty, medium pressure systems that are not subjected to high flows or temperatures.
Extremely low leakage. If the load drifts due to the valve, the seat has probably been damaged by contamination and the valve should be replaced.
For models with manual load release control option, turn load release clockwise to release load.
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.
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 CURVES
RELATED MODELS
CKCAS Vented pilot-to-open check valve with SAE-4 external pilot port, standard pilot, and Delrin seat
CKCAV Vented pilot-to-open check valve with 1/4 NPTF external pilot port, standard pilot, and Delrin seat
