The Type 2051 pneumatic rotary actuators are low maintenance single or double acting pneumatic linear piston actuators where linear movement of the piston due to the pilot air causes a 90º rotation of the connected valve. Actuator-valve coupling is made via a universal ISO 5211 mechanical interface. The status of ball or butterfly valve can be monitored via the feedback switches of 1061. Moreover the actuator can be used as modulating control actuator by the addition of Bürkert’s range of Side Control positioners 8792/3.

The Type 2052 pneumatic rotary actuator consists of a single or double-acting pneumatic linear piston actuator with an internal coupling to a rotary joint and a universal mechanical interface acc. to ISO 5211. The actuator shaft is rotated 90º via the coupling by the linear movement of the piston due to the compressive force of the pilot air or the force of the return springs. This rotation movement can be utilised for respective actuators such as ball valves, flaps, etc. The actuator has an optical display for the rotation position. The actuator is cataphoresis and Rilsan coated internally and externally which makes it very corrosion resistant and maintenance free.