W hydraulic winch is composed of oil distributor, hydraulic motor, brake, reducer, reel and stand. The oil distributor include one-way balance valve, brake and high pressure shuttle valve. W winch has its own valve group, so that it makes hydraulic system more simple and increases stability of the transmission device. The hydraulic valve group of W winch solve the problem of empty hook vibrating and fall again during hoisting. So W winch can lift and put down stably. When starting and working, W winch is high efficiency, low energy consumption, low noise and beautiful form. Application W hydraulic winch can be used on following application: Traction equipment of gravity crushing Pedrail crane and ship crane Automobile crane Pipe hoist machine Grab bucket Drilling machine with crushing function   Description of parameters 1. The total displacement of W hydraulic winch means the oil volume for driving the reel rotating one circle. 2. Oil supply volume is the theoretical rate of flow of the pump station, It is calculated base on 90% system efficiency. 3.Rope capacity means the theoretical maximum rope of the winch. The actual effective rope capacity should consider that remaining 3 loops of steel wire unused. This is to prevent the rope disengaging from the reel.