Type 8840

15 | 20

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6.

Product accessories

Electrical position indicator

Control head

Type 8691  Actuator size Ø 70 mm

The control heads Type 8691 and Type 8695 are optimised for integrated mounting on process valves

of the 21XX series. The valve position is detected without contact via an analogue sensor element.

The sensor element automatically detects and stores the valve end positions during commissioning

using the teach function. The integrated pilot valve controls single-acting or double-acting actuators.

The valve switching status is indicated by coloured high-performance LEDs.

Features

• Status indication via coloured high-performance LEDs

• Wear-free inductive position sensor

• Pilot valve with manual override

• Teach function for automatic recognition of valve end positions

• Hygienic stainless steel design

• Easy-to-clean, chemically resistant housing according to IP65/67, 4X rating

• AS-Interface, IO-Link, Bürkert system bus (büS)

Customer benefits

• Simple and safe commissioning using the teach function

• Easy process monitoring and fault detection through visible coloured high-performance LEDs

• High degree of system availability due to increased actuator service life by means of spring chamber

ventilation

• Minimal space requirement in plant piping for more flexibility in plant design

Type 8695 

Actuator size Ø 50 mm

Pneumatic control unit/position feedback

Type 8690  Actuator size Ø 70 mm

The pneumatic control units Type 8690 and 8697 are optimised for integrated mounting on process

valves of the 21XX series. Mechanical or inductive limit switches detect the valve position. The

integrated pilot valve controls single-acting or double-acting (Type 8690) actuators.

Features

• Optical position indicator

• Mechanical or inductive proximity switches for end position detection

• Pilot valve with manual override

• Compact design

• Easy-to-clean, chemically resistant housing according to IP65/67, 4X rating

• Optionally intrinsically safe design according to ATEX/IECEx

Customer benefits

• Simple and safe commissioning using the teach function (Type 8697)

• Signal reliability due to the automatic adjustment of the limit switches

• Minimal space requirement in plant piping for more flexibility in plant design

Type 8697 

Actuator size Ø 50 mm