Sun Hydraulics Counterbalance Valve - Standard Capacity - 4.5:1 Pilot Ratio - CBEGLCN

Features
 • 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
 • Other names for this valve include motion control valve and over-center valve
 • 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 200 psi (14 bar)
 • Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the backpressure
 • 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
 • 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
 • 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
 • This valve does not have positive seals on the pilot section and will pass up to 2 in³/min@1000 psi (32 cc/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
 • 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

Specifications

 • Cavity :- T-2A
 • Series :- 2
 • Capacity :- 30 gpm120 L/min.
 • Pilot Ratio :- 4.5:14.5:1
 • Maximum Recommended Load Pressure at Maximum Setting :- 3850 psi270 bar
 • Maximum Setting :- 5000 psi350 bar
 • Factory Pressure Settings Established at :- 2 in³/min.30 cc/min.
 • Maximum Valve Leakage at Reseat :- 5 drops/min.0,3 cc/min.
 • Adjustment - No. of CCW Turns from Min. to Max. Setting :- 3.753.75
 • Operating Characteristic :- StandardStandard
 • Reseat :- >85% of setting>85% of setting
 • Valve Hex Size :- 1 1/8 in.28,6 mm
 • Valve Installation Torque :- 45 - 50 lbf ft61 - 68 Nm
 • Adjustment Screw Internal Hex Size :- 5/32 in.4 mm
 • Locknut Hex Size :- 9/16 in.15 mm
 • Locknut Torque :- 80 - 90 lbf in.9 - 10 Nm
 • Model Weight :- 0.63 lb.0.29 kg.
 • Seal kit - Cartridge :- Buna: 990202007
 • Seal kit - Cartridge :- EPDM: 990202014
 • Seal kit - Cartridge :- Polyurethane: 990002002
 • Seal kit - Cartridge :- Viton: 990202006

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