 2025 Sun Hydraulics 1 of 3

MODEL

CABGCABG

4.5:1 pilot ratio, vented counterbalance valve - atmospherically

referenced

SERIESSERIES 1 / 1 / CAPACITY:CAPACITY: 30 L/min. / 30 L/min. / CAVITY:CAVITY: T-11A T-11A

3-Port Atmospherically Referenced

3-Port Atmospherically Referenced, Non-

adjustable

Atmospherically vented counterbalance valves with pilot assist are meant to control an

overrunning load. The check valve allows free flow from the directional valve (port 2) to the

load (port 1) while a direct-acting, pilot-assisted relief valve controls flow from port 1 to port

2. Pilot assist at port 3 lowers the effective setting of the relief valve at a rate determined by

the pilot ratio. Backpressure at port 2 does not affect the valve setting because the spring

chamber is atmospherically referenced.

Other names for this valve include motion control valve and over-center valve.

sunhydraulics.com/model/

CABG

 2025 Sun Hydraulics 2 of 3

(L)(L)CONTROLCONTROL

LL Standard Screw Adjustment

CC Tamper Resistant - Factory Set

(H)(H)FUNCTIONAL SETTING RANGEFUNCTIONAL SETTING RANGE

HH 1000 - 4000 psi w/25 psi Check

(70 - 280 bar w/ 1,7 bar Check),

3000 psi (210 bar) Standard

Setting

(N)(N)SEAL MATERIALSEAL MATERIAL

NN Buna-N

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.

TECHNICAL DATATECHNICAL DATA

Cavity T-11A

Series 1

Capacity 30 L/min.

Pilot Ratio 4.5:1

Maximum Recommended Load Pressure at Maximum Setting 215 bar

Maximum Setting 280 bar

Factory Pressure Settings Established at 30 cc/min.

Maximum Valve Leakage at Reseat 0,3 cc/min.

Check Cracking Pressure 1,7 bar

Adjustment - No. of CCW Turns from Min. to Max. Setting 3

Reseat >85% of setting

Valve Hex Size 22,2 mm

Valve Installation Torque 41 - 47 Nm

Adjustment Screw Internal Hex Size 4 mm

Locknut Hex Size 15 mm

Locknut Torque 9 - 10 Nm

Seal kit - Cartridge Buna: 990011007

Seal kit - Cartridge Polyurethane: 990011002

Seal kit - Cartridge Viton: 990011006

Model Weight 0.16 kg.

TECHNICAL FEATURESTECHNICAL FEATURES

Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.

Turn adjustment clockwise to decrease setting and release load.

Full clockwise setting is 200 psi (14 bar).

Free-flow check capacity (port 2 to port 1) is equivalent to the CAC* and CWC* models but the piloted-open flow capacity (port 1 to

port 2) is reduced. See performance curve.

All 3-port counterbalance and pilot-to-open check cartridges are physically interchangeable (i.e. same flow path, same cavity for a

given frame size), however, the model CABG has a reduced overall length, allowing for easier packaging.

Approximately 1 drop (0,07 cc) of fluid will pass from the pilot area to the vented spring chamber every 4000 cycles.

Reseat exceeds 85% of set pressure when the valve is standard set. Settings lower than the standard set pressure may result in

lower reseat percentages.

Sun counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and

improved stiffness in the circuit.

This valve has positive seals between all ports.

With vented valves, a lower pilot ratio may be required to achieve machine stability compared to non-vented valves.

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

Model Code Example: CABGLHNModel Code Example: CABGLHNCONFIGURATION OPTIONSCONFIGURATION OPTIONS