AIR TORQUE 120°, 135°, 180° double acting 4th Generation actuators provide rotations of 120°, 135° or 180°. The external travel stop is available as a standard in fully open position (120°, 135° or 180°) and in fully close position (0°), and it is easily and precisely adjustable of +/- 4° in both directions. Fields of application: 3 or 4 way valves, special valves for sample taking and any applications where a 120°, 135° or 180° rotation is required.