Burkert Type 8681 process valve control head

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The Burkert Type 8681 control head, integrating pneumatic actuation, feedback, diagnostics and fieldbus interface, has been engineered to assemble with all commercially available hygienic ball valves, butterfly valves, single-seat, double-seat and mix-proof valve configurations.

Designed for use in hygienic processes in the dairy, food and beverage, biotechnology or pharmaceutical industries, the 8681 head has a smooth and chemically resistant IP65/67 enclosure that is easily cleaned and suited to use in washdown areas. A contactless internal positioning system negates internal wear and there are manual overrides on the pneumatic pilots.

Its super-bright LED position indication is designed to be visible from across the plant floor with green, amber and red LEDs indicating valve switching position, or maintenance and fault indication, with status and colour settings customised via DIP switch. This feature has been designed with dairy and food and beverage plants in mind, where process machinery commonly spans a wide distance or stretches high above walkways.

The 8681 control head controls strokes up to 85 mm with three positions, with 200 L/min pneumatic air for each pilot valve, and is certified for explosive environments, with ATEX Cat 3, Zone 2/22. Other features of the 8681 head include automatic configuration ‘teach-in’ software, that auto-commissions the control head, the ability to adjust chamber switching speed individually in both directions of movement, and the inclusion of a non-return valve to prevent faulty switching due to back pressure.