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8694 Electro-Pneumatic Control Top


Digital electro-pneumatic positioner for the integrated mounting on process control valves

Harco offers the compact Bürkert Type 8694 electro-pneumatic control top, for integrated mounting on pneumatically operated process valves. Remote setpoint adjustment via a 4…20 mA signal or through AS-Interface. A contact-free analogue position sensor measures the position of the valve spindle. Simple installation through automatic TUNE-function and setting through DIP-switch:

  • Close tight function
  • Characteristic curves selection
  • Reversal of effective direction
  • Switching manual /automatic operation
  • Binary input

Additional parametrization options are possible through DTM devices. A software interface can be used for, amongst others, linearisation of the operation characteristics by using free programmable fixed points. The valve position indication is shown through LED components. As an option an analogue position feedback can be integrated.


  • Compact, robust stainless steel design
  • Start-up by automatic TUNE-function
  • Contact-free position sensor
  • Integrated control air routing
  • AS-Interface, IO-Link or Bürkert System bus (büS)

Click here for more information or contact us at 1-800-361-5361 or 705-743-5361, or