Product Overview
Cartridge
Description
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.
Specifications
Cavity T-11A
Series 1
Capacity 10 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 Semi-restrictive
Reseat >85% of setting
Valve Hex Size 7/8 in.
Valve Installation Torque 30 - 35 lbf ft
Adjustment Screw Internal Hex Size 5/32 in.
Locknut Hex Size 9/16 in.
Locknut Torque 80 - 90 lbf in.
Model Weight 0.35 lb.
Seal kit - Cartridge Buna: 990011007
Seal kit - Cartridge EPDM: 990011014
Seal kit - Cartridge Polyurethane: 990011002
Seal kit - Cartridge Viton: 990011006
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.
Two check valve cracking pressures are available. Use the 25 psi (1,7 bar) check unless actuator cavitation is a concern.
*Please note that image representation may only represent a product series with particular items. The buyers responsibility is to ensure the product SKU matches their specifications before purchase.
