12 malfunctions, Tab. 16: tightening torques for diaphragms – Burkert Type 2105 User Manual
Page 40
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Malfunctions
Orifice dn
(diaphragm
size) [mm]
tightening torques for diaphragms [nm]
epdm/fkm
ptfe / advanced ptfe /
laminated advanced ptfe
8
2.5
2.5
15
3.5
4
20
4
4.5
25
5
6
40
8
10
50
12
15
Tab. 16: Tightening torques for diaphragms
12
malfuncTiOns
malfunction
cause /remedial action
Actuator does
not switch.
Pilot air port interchanged
8)
CFA:
Connecting pilot air port 1
CFB:
Connecting pilot air port 1
CFI
Pilot air port 1: Open
Pilot air port 2: Close
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. 17: Malfunctions
7)
see “Fig. 38: Pneumatic connection”
english
Type 2103, 2104, 2105