LCBEA

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Description

A cartridge-style standard capacity counterbalance valve

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  • Technical Feature

    OPERATION:

    Counterbalance valves with pilot assist are meant for control on overrunning load. The

    check valve allows free flow from port ② to 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.

    • Backpressure at port ② adds to the effective relief setting at a ratio of 1 plus the pilot

    ratio times the backpressure.

    • Reseat exceeds 85% of set pressure when the valve is standard set. Setting lower

    than the standard set pressure may result in lower reseat percentages.

    • Factory pressure setting established at 30cc/min(2 in3/min).


  • PerformanceCurves

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  • Technical Data

    Flow
    See PRESSURE DROP VS.FLOW graph.
    Cavity
    SUN T-2A
    Filtration
    Refer to "Cleanliness of Hydraulic Fluid"
    Max.Setting
    280 bar
    Max.Recommended Load Pressure at Max.Setting
    215bar
    Internal Leakage
    5 drops/min.
    Pilot Ratio
    3:01
    Temperature
    -40°F to +250°F(-40°C to +120°C)
    Fluids
    Mineral-based fluids with viscosities of 7.4 to 420 cSt.
    Body Material
    6061-T6 aluminum alloy rated to 207bar, Steel & Ductile iron rated to 350bar
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