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Burkert-Type 8690 - Pneumatic control for decentralised automation of ELEMENT process valves

Burkert – Type 8690 – Pneumatic Control Unit for Decentralized Automation of Process Valves ELEMENT

  • Compact design
  • Visual position indicator
  • Integrated pilot valve with manual override
  • Integrated control air routing in the actuator
  • With ATEX II cat. 3G/D and cat. 2G/D approval
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Type 8690 – Pneumatic Control Unit for Decentralised Automation of Process Valves ELEMENT

The pneumatic control unit Type 8690 is designed for decentralised automation of ELEMENT Type 21xx pneumatic process valves. Mechanical or inductive limit switches register the valve position. The integrated pilot valve controls single or double-acting actuators. The design of the control unit and the actuator enables an internal control air routing without external tubings. Besides the electrical position feedback, the status of the device is shown directly on the pneumatic control unit itself. The housing is easy to clean and features proven IP protection and chemically resistant materials for use in hygienic processing, in food, beverage and pharmaceutical industries. Focused on wash down applications, the IP protection of the housing is supported by a 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.

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Data Sheet User Manual

Can be combined with

Product properties
Dimensions Detailed information can be found in chapter “3. Dimensions” on page 5.
Body PPS
Seals EPDM
Cover PC
Setting valve end positions Manual
Manual override Pilot valve Yes
Display of device and valve status Optical
Optical position indicator (mechanical) Yes
Position sensor/Position feedback
Micro switch 1 or 2x Micro switch (24 V DC)
Initiator 1 or 2x Initiator 3 wire (24 V DC)
1 or 2x Initiator NAMUR (8 V DC) (ATEX II 2G Ex ia IIC T6)

Stroke range for linear actuators
Valve spindle – Micro switch 7…28 mm
Valve spindle – Initiator 2…28 mm

Electrical data
Pilot valve 24 V DC ± 10 %, residual ripple 10 % DC; power consumption 1 W
Micro switch Max. 24 V DC, max. 2 A
Initiator 10…24 V DC, max. 100 mA ext. load per initiator
Protection class 3 acc. to DIN EN 61140
Power consumption < 1 W
Multipole M12, 8 pin
Cable gland M16 x 1.5 (cable Ø 5…10 mm) with screw terminals for cable cross sections 0.14…1.5 mm²

Pneumatic data
Control medium Neutral gases, air, quality class acc. to ISO 8573 – 1
Dust content Class 7 (< 40 µm particle size)
Particle density Class 5 (< 10 mg/m3)
Pressure dew point Class 3 (<- 20 °C)
Oil content Class X (< 25 mg/ m3)
Air supply filter Exchangeable
Mesh size ~0.1 mm
Supply pressure 3…7 bar1.)
Pilot air ports Threaded connection G ⅛ stainless steel or push-in connector (pipe Ø 6 mm / ¼”)

Actuating system
Circuit function Single and double-acting
Air capacity 7 lN/min (for aeration and ventilation) (QNn-value acc. to definition at pressure drop from 7 to 6 bar absolute)
Actuator series/size Type 21xx, Ø actuator 50 mm

Actuating system
Circuit function Single and double-acting
Actuator series/size Type 21xx, Ø actuator 70/90/130 mm

*For selecting thecorrect product please refer to the technical data, images and notes for proper use according to the data sheet, or contact Flu-Tech directly.

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  02-384-6060 (อัตโนมัติ)    [email protected]    บริษัท ฟลูเทค จำกัด Flu-tech    @flutech.co.th