Product Description
Feedback Type 8685 and control head Type 8686 are optimized for integrated mounting on pneumatically operated actuators Type 2036 Robolux. The adjustment to the individual actuator size is done through DIP-switches. As compact units the devices contain the complete automation functionality of both individually operated actuator pistons. Depending on the configuration, electrical and visual position feedback is done by non-contact switches and LEDs, integrated pilot valves control the actuator pistons and AS-interface communication is available. In this way a complete concept for decentralized automation is feasible. The compact body is especially distinguished by its hygienic design, materials being chemically resistant against cleaning media and a proven IP protection. In addition the Control Head Type 8686 features an integrated compressed air filter to protect the pilot valve function against particles through the compressed air supply.
Technical Specifications
- Body
- 1.4435 stainless steel (316L)
- Diaphragm
- EPDM (AD), laminate of Advanced PTFE and EPDM (EK), laminate of GYLON® and EPDM (ER)
- Actuator
- 1.4308 stainless steel (CF8)
- Internally mechanically polished
- Ra ≤ 0.5 μm (ASME BPE SF1) (external Ra ≤ 1.6 μm)
- Internally electrically polished
- Ra ≤ 0.38 μm (ASME BPE SF4 / DIN HE4) (external Ra ≤ 1.6 μm)
- Maximum pilot pressure (CF A)
- 6…10 bar for RV50/70
- Pilot air port
- Thread G ⅛"
- EPDM (AD)
- + 5…+ 130 °C (steam sterilisation + 140 °C for 60 min)
- Laminate of Advanced PTFE and
- + 5…+ 90 °C (not recommended for steam)
- Medium pressure
- Max. 8 bar (dependent on actuator and diaphragm)
- Nominal diameter (port connection)
- ¼"…2", DN 04…DN 50
- Welded connection
- DIN EN ISO 1127 / ISO 4200 / DIN 11866 series B
- Clamp connection
- DIN 32676 series A (DIN pipe)
- Ambient temperature
- 0…+ 60 °C
- Degree of protection
- IP65/IP67 according to EN 60529
Standards & Compliance
- HS Code
- 8481.80
Cross References
- Burkert 8685
- Buerkert 8685
- Bürkert 8685
- Type 8685
- Burkert Type 8685
Product Documentation
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Catalogue entry last verified: 2026-08-13. A manufacturer datasheet is attached to this entry — confirm application-critical values against it.
Frequently asked questions
- Where can I buy Type 8685?
- Type 8685 can be ordered from cballast.com as a Bürkert catalogue item: request a quotation on this page or email sales@cballast.com, and the order ships worldwide.
- What is the manufacturer part number for this Bürkert product?
- The manufacturer part number is Type 8685.
- What is the HS code for Type 8685?
- The customs tariff (HS) code for Type 8685 is 8481.80.
- Who manufactures Type 8685?
- Type 8685 is a Bürkert product in the Valves range.
- Is a datasheet available for Type 8685?
- Yes — the Type 8685 datasheet can be viewed and downloaded on this page.
- What is the minimum order quantity for Type 8685?
- The minimum order quantity is 1.
- Is Type 8685 available?
- Yes — Type 8685 is available to order: fulfilment is from supplier stock in cBallast's European network, dispatched directly from the warehouse to the customer, with the exact lead time stated in the quotation (reply within 24 hours).