TSA has developed specially for winch and hoist applications a braked air motor set. The unit has a robust vane motor with an fail safe BN brake and a proportional directional control valve. The vane motor is of ridged design and very good for harsh conditions. The BN brake is a spring loaded, air release failsafe brake. The holding torque is 1,5 to 2 time the maximum torque of the motor.On top of the motor a proportional control valve is mounted. It can be a proportional remote control valve of a proportional hand control valve. The proportional valve controls the direction and speed of the motor.The brake is released with pipelines from the proportional control valve. The unit is designed that the motor is first under pressure before the brake is released. As standard the proportional valves can be supplied with either Equal Power of Biased Power spools, the latter is suitable for hoisting applications. The motor willhave maximum power in lifting and reduced power in lowering. Because of thebiased valve the load will not pull the motor in over speed in lowering direction. 

The air motor unit confirms to European Standard NEN-EN 13463-1 for non-electricalequipment for explosive atmospheres ATEX GROUP II cat 2 GDc T4.