• Control shaft diameter 17 mm
• Drive height with carrier: 185 mm
• Drive diameter: 85.3 mm
• Torque: 20 Nm
• Control pressure: 4-8 bar (5-7 bar recommended)
• Operating temperature: –10 ° C to 100 ° C
• Adjustment speed: 1.5 sec / 90 °
• Material stainless steel AISI 304

A pneumatic single-acting actuator (air/spring) is used for opening and closing butterfly valves with compressed air (the recommended value for safe valve opening is 5 - 8 bar). The spring of the pneumatic actuator serves for closing the butterfly valve (without control air pressure) or in case of decreasing control air pressure for a safe closing of the valve (damper).

To control the pneumatic actuator, the actuator must be supplemented with a pilot (electromagnetic) valve for controlling the compressed air supply. The valve can also be equipped with inductive sensors to indicate the actual valve position (open/closed). This configuration allows you to operate the damper via a feedback control system in which position the damper is located.

The position of the flap is also indicated (visually) by a pin that is mounted on the control shaft.