Valve Position After Supply Voltage Failure - Burkert 3363 Operating Instructions Manual

Typ 3363, 3364, 3365
Structure and function
Blind cover or display module
device status indicator and
Transparent inspection view with
Fig. 2: Structure, electromotive diaphragm control valve AG3
6.2

Valve position after supply voltage failure

Valve position for devices without the SAFEPOS energy-pack:
If the electromotive actuator idles upon a supply voltage failure, the valve remains in the last position that it
was in.
If the supply voltage fails while the actuator is changing the valve position, the valve remains in an undefined
position. The flywheel mass of the actuator and the operating medium pressure continue to influence the valve
spindle until it finally idles.
Valve position for devices with the SAFEPOS energy-pack:
The valve assumes the safety position defined in the SAFEPOS menu.
For a description of the SAFEPOS energy-pack, see chapter "7.3 Energy storage SAFEPOS energy-
pack (option)" on page 27
with
bayonet catch
Actuator cover
Actuator housing
position indicator
Actuator base
2 relief bores
Diaphragm
Valve body
Pressure compensation
element/access to the
mechanical manual
override
SAFEPOS energy-pack
(optional)
Only for devices with
process control function
Electrical connections (cir-
cular plug-in connector)
FE functional earth
Diaphragm socket
Port connection
English
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