Yodify Product Library
Instantly add the Type 8681 Hygienic Process Valve and 50,000+ more product series to your store or catalog
Book Your Demo and See How
or create your store
Type 8681 Hygienic Process Valve
Brand: Burkert Fluid Control SystemsThe control head Type 8681 is optimized for decentralized automation of hygienic process valves. Thanks to its universal adapter it can be combined with all normal commercial butterfly valves, ball valves, single and double seated valves.
With a decentralized automation concept, the control head takes over all pneumatic actuation, feedback and diagnostic functions including field bus communication.
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. Depending on the process valve type, up to 3 pneumatic actuator chambers can be controlled independently from each other.
The switching speeds of both movement directions can be set separately. A built-in check valve prevents incorrect switching of process valve actuator chambers which could result from back-pressure. The process valve switching positions are detected by an inductive, Analog position sensor and reported to the PLC system.
Up to 3 switching points can be adjusted automatically by a Teach-In function. Additionally a fourth switching position can be read in and fed back via an external inductive proximity switch. The colored status display signals the particular process valve switching position or indicates a diagnostic function such as maintenance required status or fault conditions.
The pilot valves are equipped with a manual override. If the device housing is closed, the patented magnetically encoded manual override tool can be used to open the process valve from the exterior. Bus communication is available with AS-interface or DeviceNet.
Features- Universal attachment for hygienic process valves
- Contactless position measurement system with 3 switching points (Teach-In function)
- Colored status display
- Manual override operative with closed housing
- Fieldbus AS-Interface or DeviceNet (option)
Specifications
Enclosure/Body Material
- Body: PA, PPO, VA
Seal Material
- PC
Cover Material
- CR, EPDM
Display
- High-Power LEDs (Colours Individually Adjustable)
Communication
- FOUNDATION Fieldbus: AS-Interface
- Digital: IO-Link, büS/CANopen
Pilot Air Port
- G 1/4”, G1/8”
Certifications & Approvals
- UL
- FM
- ATEX
Ambient Temperature
- -10° to 55° C
Environmental Protection
- IP65, IP67
Power Supply
- 12-28 Vdc
Power Consumption
- < 5 W