Burkert 2030 Manuel D'utilisation page 34

→
Check the tightening torque of the screws again.
replacement of the diaphragm for control functions B and i
→
Clamp the valve housing in a holding device (applies only to valves
not yet installed).
→
Loosen the fastening screws crosswise and remove actuator
together with diaphragm from the housing.
→
Unbutton or unscrew old diaphragm. If attachment is with a bayonet
catch, remove the diaphragm by rotating it through 90° (see Tab.
10:Fastening types for diaphragms).
→
Install new diaphragm in actuator (see
for diaphragms).
→
Align diaphragm.
Observe mark tab for direction of flow!
→
Place actuator back on the housing.
→
Lightly cross-tighten the housing screws without pressurization
until the diaphragm is between the housing and actuator.
do not tighten the screws yet.
→
Pressurize upper control air connection with compressed air
(value as indicated on the rating plate) (see Fig. 31:Control air
connection).
→
Actuate the diaphragm valve twice.
→
Tighten the housing screws to the permitted tightening torque
(see Tab. 11:Tightening torques for diaphragms).
34
Tab. 10:Fastening types
English
Types 2 030, 2031, 2031 K, 2032,
Repairs
Upper control air connection
(for CFB and CFI)
Lower control air connection
(for CFA and CFI)
Fig. 31: Control air connection
dn tightening torques for diaphragms [nm]
epdM / fkM
8
15 3.5
20
25
32
40
50 12
65 15
Tab. 11: Tightening torques for diaphragms
2033, 2037
ptfe
2 2.5
4
4 4.5
5 6
6 8
8 10
15
20