Burkert 2030 Manuel D'utilisation page 32

Replacement of the diaphragm for control functions B and I
→
Clamp the valve body in a holding device (applies only to valves
not yet installed).
→
Loosen the fastening screws crosswise and remove actuator
together with diaphragm from the body.
→
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 "Tab. 10: Fastening types
for diaphragms").
→
Align diaphragm.
Observe mark tab for direction of flow!
→
Place actuator back on the body.
→
Lightly cross-tighten the body screws without pressurization until
the diaphragm is between the body and actuator.
Do not tighten the screws yet.
→
Pressurize upper control air connection with compressed air
(value as indicated on the type label) (see "Fig. 32: Control air
connection").
→
Actuate the diaphragm valve twice.
→
Tighten the body screws to the permitted tightening torque (see
"Tab. 11: Tightening torques for diaphragms").
32
english
Type 2 030, 2031, 2031 K, 2032,
Repairs
Upper control air connection
(for CFB and CFI)
Lower control air connection
(for CFA and CFI)
Fig. 32: Control air connection
Orifice Tightening torques for diaphragms [Nm]
(Diaphragm size)
EPDM / FKM
[mm]
8 2
15 3.5
20 4
25 5
32 6
40 8
50 12
65 20
Tab. 11: Tightening torques for diaphragms
2033, 2037
PTFE / advanced PTFE /
laminated advanced PTFE
2.5
4
4.5
6
8
10
15
30