Created on 09/14/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2
MODEL
CKID
Pilot-to-open check valve with sealed pilot
SERIES 4 / CAPACITY: 480 L/min. / CAVITY: T-19A
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 DATA
Pilot Ratio 3:1
Maximum Operating Pressure 350 bar
Maximum Valve Leakage at 110 SUS (24 cSt) 0,07 cc/min.
Seal kit - Cartridge Buna: 990-019-007
Seal kit - Cartridge Polyurethane: 990-019-002
Seal kit - Cartridge Viton: 990-019-006
(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
MATERIAL/COATING
Standard Material/Coating
/AP Stainless Steel, Passivated
/LH Mild Steel, Zinc-Nickel
snhy.com/
CKID
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.
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.
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.
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
Model Code Example: CKIDXCNCONFIGURATION OPTIONS
Created on 09/14/2015
c
2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2
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.
PERFORMANCE CURVES
