DACBGG-LJN Counterbalance Valve 

DESCRIPTION

Fixed-setting, 3-port Counter Balance Valves with pilot assist function similarly to the adjustable versions except the fixed setting is pre-set to a nominal value.

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.

FEATURES

● Counter Balance Valves should be set at least 1.3 times the maximum load induced pressure.

● Back pressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the back pressure.

● Reseat exceeds 85% of set pressure when valve is standard set.Settings lower than the standard pressure may result in lower reseat percentage.

RATINGS

Maximum setting = 350 bar.350bar Maximum recommended load

pressure at maximum setting = 270bar

Flow Rating：See Performance Chart

Internal Leakage: 0.4ml/min max. to 85% of nominal setting.

Setting Pressure Defined: bar (psi) evident at 7.6 lpm (2.0 gpm) attained

Pilot Ratio: 4.5：1

Maximum setting pressure should be 1.3 times the maximum load induced pressure.

Temperature: -40℃ to 120℃，with standard Buna seals;

Fluids: Mineral-based or synthetics with lubricating properties at viscosities of 7.4 to 420 cSt (50 to 2000 ssu);

Standard Ported Body：Steel rated at 420 bar（6090）.

Cavity: