Type 8690 positioners combine simply and reliably with Type 23xx/2103 process valve actuators, and are specially designed for hygienic process environments.
Functions can be activated using push-buttons and DIP switches or a PC interface.
The position setpoint is set using the standard signal 4-20 mA. In addition, the enable can be controlled using the binary input and an optional position feedback can be integrated. Fieldbus communication can be provided via optional AS-Interface.
Mechanical or inductive limit switches register the position of the valve. The integrated pilot valve controls single or double-acting actuators. The design of the control unit and the actuator enables an internal control air channel without external tubings. Besides the electrical position feedback signal, the status of the device is shown directly on the Control Unit itself.
They meet the demands of plant washdown environments thanks to their compact design, materials used, external seals, and integrated control air supply to the actuator.
The housing is easy to clean and features proven IP protection and chemically resistant materials for use in hygienic processing, in food, beverage and pharmaceutical industries
air recycling - when combined with ELEMENT actuators - avoids actuator chambers contamination from the environment