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1、Counterbalance Valve BVD . for Travel DrivesCounterbalance Valve BVD . W for WinchesA6V 2202-e / VAV 04.01Counterbalance Valve on A6VMA6V 2183-e / VAV 10.99Counterbalance valvePressure relief valve Counterbalance Valve on A2FMA2F 2144-e / VAV 08.99Counterbalance valveSecondary pressure relief valveC
2、ounterbalance Valve on WinchesLiftingHolding brakeBrake release valveCounterbalance spoolCounterbalance Valve on WinchesA6V 2185-e / VAV 08.99LoweringWinch version:start of opening at 20 barfully opened at 40 barLoad pressurecaptured between motor and counterbalance valve;load supported by counterba
3、lance valveBrake opensat 18 barCounterbalance Valve on WinchesA6V 2186-e / VAV 08.99Uncontrolled Lowering by Motor LeakageClosed spoolMotor works as pumpMotor leaks Motor turns some 2 rpm Sucks B line empty Load falls downTherefore: Brake must be closed automatically!Counterbalance Valve on WinchesBrake release valveCounterbalance spoolCheck valve 1Check valve 2BrakeDistributorCounterbalance ValvesSectional ViewCheck valve 1Check valve 2Counterbalance spoolShuttle valve for closing velocityBrake release valve
