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2025 Sun Hydraulics 1 of 2
MODEL
CKBDCKBD
Pilot-to-open check valve with sealed pilot
CAPACITY:CAPACITY: 30 L/min. / 30 L/min. / CAVITY:CAVITY: T-163A T-163A
(X)(X)CONTROLCONTROL
XX Standard Pilot
LL Manual Load Release
(C)(C)CRACKING PRESSURECRACKING PRESSURE
CC 30 psi (2 bar)
EE 75 psi (5 bar)
(N)(N)SEAL MATERIALSEAL MATERIAL
NN Buna-N
EE EPDM
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 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-163A
Series 0
Capacity 30 L/min.
Maximum Operating Pressure 350 bar
Pilot Ratio 3:1
Maximum Valve Leakage at 110 SUS (24 cSt) 0,07 cc/min.
Valve Hex Size 19,1 mm
Valve Installation Torque 27 - 33 Nm
Seal kit - Cartridge Buna: 990163007
Seal kit - Cartridge EPDM: 990163014
Seal kit - Cartridge Polyurethane: 990163002
Seal kit - Cartridge Viton: 990163006
Model Weight 0.09 kg.
sunhydraulics.com/model/
CKBD
Model Code Example: CKBDXCNModel Code Example: CKBDXCNCONFIGURATION OPTIONSCONFIGURATION OPTIONS
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2025 Sun Hydraulics 2 of 2
TECHNICAL FEATURESTECHNICAL FEATURES
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.
Note: Available only with 30 psi or 75 psi (2 bar or 5 bar) check valve cracking pressures.
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.
Cartridges configured with EPDM seals are for use in systems with phosphate ester fluids. Exposure to petroleum based fluids,
greases and lubricants will damage the seals.
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 CURVESPERFORMANCE CURVES
