The device Type 8691 control head is designed for decentralised automation of ELEMENT Type 21xx pneumatic process valves. The valve position is registered via a contact-free, analogue sensor element which automatically detects and saves the valve end position using the Teach function during start-up. The integrated pilot valve controls single or double-acting actuators. An optional communication interface, AS-Interface, IO-Link or büS (based on CANopen) can be selected. The design of the control head and the actuator permits internal control air routing without external piping. Besides the electrical position feedback, the device status is shown directly on the control head itself through coloured powerful LEDs, even in difficult ambient conditions. The housing is easy to clean and features proven IP protection and chemically resistant materials for use in hygienic processing in the food, beverage and pharmaceutical industries. Focused on plant wash-down applications, the IP protection of the housing is supported by positive pressure inside the control head. Combined with Bürkert ELEMENT actuators, the pneumatic actuating system enables spring chamber aeration that avoids actuator chamber contamination from the environment.
- Contact-free inductive valve position registration (Teach function)
- Colour illuminated status display
- Integrated pilot air duct in the actuator
- Fieldbus interface AS-Interface, IO-Link or Bürkert system bus (büS)
- With ATEX II cat. 3G/D / IECEx approval
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Return of good quality goods
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You have the right to return a product of good quality if it does not fit you in size, or any other criterion, subject to the following conditions:
The goods and packaging have the original presentation (packaging, seals, labels are preserved)
There is a document confirming the fact and conditions for the purchase of the specified goods (sales or cash receipt, invoice)
The deadline for submitting a return application does not exceed 14 days from the date of receipt of the order.
The product is not included in the list of non-returnable goods.
Return of goods of inadequate quality
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A product of inadequate quality means a product that is defective and cannot ensure the performance of its functional qualities. Goods of inadequate quality also include goods that the Customer returns due to non-compliance with the ordered goods (article, quality). Differences in the design elements or design of the goods from those stated in the description on the site are not indicators of the quality of the goods.
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