Type 3321

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Operating limits for seat seal

PTFE is used for max. medium temperature < 130 °C. If the maximum medium temperature temporarily or permanently exceeds

130 °C, then PEEK as a seal material is the appropriate solution.

Operating limits for optional versions

High temperature version

By adapting the spindle sealing this version is suitable for applications with steam, neutral gases and other heat transfer mediums up

to 230 °C.

Drinking water version

Materials in contact with the medium are tested for suitability with drinking water up to 85 °C.

Vacuum version

Without leakage bore, this design is suitable for pressures down to - 0.9 bar(g).

Low temperature version

Suitable for minimum medium temperatures down to - 40 °C

Version for oxygen

Non-metallic materials in contact with the medium are tested for suitability with oxygen. Suitable for operating pressures up to

20 bar(g) and medium temperatures up to 60 °C.

5.3. Electrical control and interfaces

Interface diagram

The position of the actuator is controlled

according to the digital input. The selection is

made either by an external standard signal or

via a fieldbus (digital).

Inputs and outputs:

• 1 digital input, 2 digital outputs

Interface:

• Cable gland with connection terminal (only

AG2)

• M12 circular plug-in connectors (optional)

Electro-

motor

valve

2 Digital outputs

24 V PNP

Operation

Note:

Optional outputs are

represented as a broken line.

Fieldbus

büS / CANopen

Digital input

24 V DC

Control data

Digital input

0…5 V = log “0", 10…30 V = log “1" inverted input reversed accordingly

Digital output (optional)

Current limitation 100 mA

Communication

Communication interface (büS)

Connection to PC via USB büS interface set (connection terminals, circular plug-in

connector or büS service interface)

Communication software (büS)

Bürkert Communicator, see Type 8920 