The device features bright light LED visual feedback, universal 1/4” & 6mm tube connection, built-in cleanable air filter, positive air pressure electronics housing, washdown environment optimization, and automatic switch position adjustment. An optional integrated pilot valve controls single or double-acting actuators. As an option, a fieldbus interface (AS-Interface or DeviceNet) can be chosen. The calibration of the valve end position is accomplished through a contact-free analog position sensor, which automatically recognizes and saves the valve end position through the “Teach” function when starting up. The device is designed to provide enhanced startup and validation time with automatic switch setting both for initial system startup and after maintenance on the underlying valves. Not subject to variation in target positions due to plant inferences.

Testimonial: “The Type 8691 is ideal to retrofit any kind of piston operated pneumatic actuator. It is sturdy built and absolutely water and air tight. The Type 8691 can be setup to prevent environmental air intake with efficient installation, especially via ASI Fieldbus at an affordable price.” – A leading systems integrator, who has worked with the Type 8691.