 2022 Sun Hydraulics 1 of 2

MODEL

CKIA

Pilot-to-open check valve with standard pilot and Delrin seat

SERIES 4 / CAPACITY: 480 L/min. / CAVITY: T-19A

(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

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 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-19A

Series 4

Capacity 480 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 41,3 mm

Valve Installation Torque 474 - 508 Nm

Seal kit - Cartridge Buna: 990019007

Seal kit - Cartridge Polyurethane: 990019002

Seal kit - Cartridge Viton: 990019006

Model Weight 1.19 kg.

sunhydraulics.com/model/

CKIA

Model Code Example: CKIAXCNCONFIGURATION OPTIONS

 2022 Sun Hydraulics 2 of 2

TECHNICAL 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.

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.

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