Created on 12/08/2016

 2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2

MODEL

CKCG

Vented pilot-to-open check valve with external pilot port, standard pilot, stem

seal, 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 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 external pilot

port will open the valve from port 1 to port 2. Pilot pressure needed to open the valve is directly proportional to the

load pressure at port 1. The valve is insensitive to pressure at port 2 because the spring chamber references the

vent (port 3).

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 0.12 kg.

(S)CONTROL

S External 4-SAE Pilot Port, Vent to Port

V External 1/4 NPTF Pilot Port, Vent to

Port 3

(C)CRACKING PRESSURE

C 30 psi (2 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/

CKCG

Model Code Example: CKCGSCNCONFIGURATION OPTIONS

Created on 12/08/2016

 2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2

TECHNICAL FEATURES

There is a positve seal between ports 2 and 3.

These valves should be considered service items only. New applications should use valves from the CV*V family.

This valve has a proportional pressure reducing characteristic that limits the pressure developed at port 1 to about 75% of the pressure at port 2.

Pilot pressure as low as 15 psi (1 bar) higher than the pressure at the vent can prevent the valve from closing.

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.

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.

This 3 port pilot-to-open check valve is not physically interchangeable with other 3 port pilot-to-open check valves or counterbalance valves due to the different

pilot/vent configuration.

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