CBGA-LHN COUNTERBALANCE CARTRIDGE SUN HYDRAULICS

CBGA-LHN COUNTERBALANCE CARTRIDGE SUN HYDRAULICS
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.

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

SPECIFICATIONS:
 

• Cavity T-17A
• Series 3
• Capacity 60 gpm
• Pilot Ratio 3:1
• Maximum Recommended Load Pressure at Maximum Setting 3075 psi
• Maximum Setting 4000 psi
• Factory Pressure Settings Established at 2 in³/min.
• Maximum Valve Leakage at Reseat 5 drops/min.
• Adjustment – No. of CCW Turns from Min. to Max. Setting 3.75
• Operating Characteristic Standard
• Reseat >85% of setting
• Valve Hex Size 1 1/4 in.
• Valve Installation Torque 150 – 160 lbf ft
• Adjustment Screw Internal Hex Size 5/32 in.
• Locknut Hex Size 9/16 in.
• Locknut Torque 80 – 90 lbf in.
• Model Weight 1.36 lb.
• Seal kit – Cartridge Buna: 990017007
• Seal kit – Cartridge EPDM: 990017014
• Seal kit – Cartridge Polyurethane: 990017002
• Seal kit – Cartridge Viton: 990017006