 2017 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 3

MODEL

CEBC

3:1 pilot ratio, semi-restrictive, LoadAdaptive™ counterbalance valve

SERIES 1 / CAPACITY: 40 L/min. / CAVITY: T-11A

3-Port Non-vented

3-Port Non-vented, Fixed Setting

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

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. The LoadAdaptive™ counterbalance valve has a higher pilot ratio when the load-induced pressure is

less than the setting of the valve (is not moving yet) and when the moving load is a positive load (not overrunning).

See P1-P3 diagrams under "Performance Curves." The P1 (Y axis) vs P3 (X axis) curves show the effective setting

P1 of the valve for different flows depending on pilot pressure P3.

Click Here for LoadAdaptive Technical Tip

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

TECHNICAL DATA

Cavity T-11A

Series 1

Capacity 40 L/min.

Pilot Ratio 3:1

Adaptive Pilot Ratio See Performance Curves

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.

Adjustment - No. of CCW Turns from Min. to Max. Setting 3.75

Operating Characteristic Semi-restrictive

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 0.23 kg.

snhy.com/

CEBC

Patents are pending for this product.

NOTES

 2017 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 3

(L)CONTROL

L Standard Screw Adjustment

C Tamper Resistant - Factory Set

(H)ADJUSTMENT RANGE

H 1500 - 4000 psi w/ 25 psi check (105 -

280 bar w/ 1,7 bar Check), 3000 psi

(210 bar) Standard Setting

A 1500 - 4000 psi w/ 4 psi check (105 -

280 bar w/ 0,3 bar Check), 3000 psi

(210 bar) Standard Setting

(N)SEAL MATERIAL

N Buna-N

V Viton

MATERIAL/COATING

Standard Material/Coating

/LH Mild Steel, Zinc-Nickel

TECHNICAL 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 less than 500 psi (35 bar).

Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the backpressure. NOTE: The ratio depends on the pilot pressure.

With no pilot pressure, the backpressure is additive with a factor of 10.

This valve does not have positive seals on the pilot section and will pass up to 4 in³/min.@1000 psi (65 ml/min.@70 bar ) between port 2 and port 3. This is a

consideration in master-slave circuits and in the leak testing of valve-cylinder assemblies.

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.

Two check valve cracking pressures are available. Use the 25 psi (1,7 bar) check unless actuator cavitation is a concern.

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

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

Model Code Example: CEBCLHNCONFIGURATION OPTIONS

 2017 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 3 of 3