Winches
The David Brown Hydraulic Systems Ltd range of lifting winches comprises the following models:
• SH series with line pull from 2000 to 2500 daN
• NP series with line pull from 500 to 1650 daN
• A series with line pull from 1950 to 3600 daN
• P series with line pull from 750 to 2500 daN
• S - SE series with line pull from 2000 to 10000 daN
• SR series with line pull from 2480 to 3560 daN
• SW series with line pull to order
 
Winches
  We are offering a complete solution comprising of following main parts: 1. Hydraulic motor:
orbit or piston motor. 2. Negative brake:
it is composed of alternating bronze and steel disks connected to the motor shaft and the body of the winch; pressurized oil from the hydraulic circuit opens the brake and is closed by springs that automatically block the discs when the motor is off. The opening and closing of the brake is determined by the starting and stopping of the motor. 3. Planetary reduction gear:
it is placed inside the drum and increases the lifting torque, reducing the drum rotation speed with respect to the motor speed. It is sized to transmit the torque required to lift the maximum load. 4. Lowering control valve:
it is hydroguided and mounted directly on to the hydraulic motor and it prevents the load from suddenly falling down; that’s why it is considered a fundamental safety device.
 5. Drum and support structures: the drum is made of steel or a casting; the support structures are bolted or made of welded steel making them particularly compact.