Custom-designed pneumatic rotary actuators

August 2006 Valves, Actuators & Pump Control

The Spirax-Mitech pneumatic rotary actuator range is custom-designed to suit various applications up to 250 000 Nm torque. The low maintenance units are available with either a double crank mechanism for modulating control or a scotch yoke design for on/off control.

The main shaft assembly on the double crank design is welded together eliminating the need for assembly and disassembly tasks. The actuator is field reversible from clockwise-to-close to clockwise-to-open and has Namur mounting for switch packs or positioners on the top shaft and transfer case lid.

Adjustable end stops allow the end position to be externally adjusted in both the open and closed position to within 7°. Due to the square drive, the actuator can be mounted perpendicular to or inline with the pipework. The pneumatic rotary actuators have a pneumatic piston design and are available in large sizes.

For more information contact Richard Ransome, Spirax-Sarco, +27 (0) 11 929 6344, [email protected]

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