SYMBOL
OPERATION
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 references the vent (port 4).
SPECIFICATIONS:
Max.Setting: 420 bar (6000 psi)
Maximum Recommended Load Pressure at Maximum Setting: 320 bar (4615 psi)
Flow: 15 gpm (60L/min)
Internal Leakage: 5 drops/min
Pilot Ratio: 5:1
Cavity: T-21A
Installation Torque: 40 – 50Nm
FEATURES:
* Counterbalance valves should be set at least 1.3 times the maximum load induced pressure.
* 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.
* Pressure at port 4 is added to the effective relief setting at a rate of 1 plus the pilot ratio times the pressure.
PERFORMANCE:
DIMENSIONS
ORDER CODE:
AAK Hydraulic Valve is a top manufacturer for Hydraulic Cartridge Counterbalance Valves in Ningbo China since 2009.
We guarantee quality for 3 years for non-standard customized valves: No leakage, No Noise, No Vibration.
Contact us to customize your valves and promote your business with our premium quality!
