Sun Hydraulics Counterbalance Valve - Vented - Atmospherically Referenced - 5:1 Pilot Ratio - CACGLGN

Features

• 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


• 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)


• 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


• 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


• 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


• Three-port vented valves are atmospherically referenced and considered problem solvers for existing circuits using non-vented valves. Over time, the vented valves may leak externally or allow moisture into the spring chamber


• Four-port vented counterbalance valves are recommended for new applications


• 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-11A


• Series : 1


• Capacity : 15 gpm


• Pilot Ratio : 5:1


• Maximum Recommended Load Pressure at Maximum Setting : 4615 psi


• Maximum Setting : 6000 psi


• Factory Pressure Settings Established at : 2 in³/min.


• Maximum Valve Leakage at Reseat : 5 drops/min.


• Check Cracking Pressure : 40 psi


• Adjustment - No. of CCW Turns from Min. to Max. Setting : 5


• Operating Characteristic : Standard


• 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 : 0.44 lb.


• Seal kit - Cartridge : 990211007


• Seal kit - Cartridge : 990011014


• Seal kit - Cartridge : 990211006

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