Burkert Type 2731 - Manual (Page 24)

8 elecTrical cOnTrOl uniT
The valve Type 2730 / 2731 / 2731K can be combined with fol-
lowing control units:
• Type 8630
Positioner TopControl Continuous
• Type 8635 Positioner SideControl
• Type 8692 Positioner TopControl
• Type 8694 Positioner TopControl Basic
• Type 8792 Positioner SideControl
• Type 8693 Process controller TopControl
• Type 8793 Process controller SideControl
Follow instructions for use in the Ex area!
See chapter “3.1”
.
The electrical connection of the control unit is described in
the respective operating instructions for the control unit.
9 MalfuncTiOns
malfunction cause /remedial action
Actuator does
not switch Pilot air port interchanged 4)
CFA: Connecting lower pilot air port
CFB: Connecting upper pilot air port
Pilot pressure too low
See pressure specifications on the type label.
Medium pressure too high
See pressure specifications on the type label.
Valve is not
sealed Medium pressure too high
See pressure specifications on the type label.
Pilot pressure too low
See pressure specifications on the type label.
Flow rate
reduced PTFE diaphragm bulging
→
Replace diaphragm.
Tab. 12: Malfunctions
4)
see “Fig. 19: Pneumatic connection”
24
Electricalcontrolunit
english
Type 2730 / 2731 / 2731K