Replacing The Diaphragm - Burkert 2103 Instructions De Service

Warning!
for control function i – danger if control pressure fails!
For control function I control and resetting occur pneumatically. If
the pressure fails, no defined position is reached.
• To ensure a controlled restart, first pressurise the device with
control pressure, then switch on the medium.
11.2. replacing the diaphragm
required spare part
• Diaphragm
fastening types
dn fastening types for diaphragms
ptfe
8 Diaphragm buttoned
15
Diaphragm with bayonet
catch
20
25
Diaphragm with bayonet
40
catch
50
34
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epdm / fkm
Diaphragm buttoned
Diaphragm screwed in
english
Type 2103
Repairs
Danger!
risk of injury from discharge of medium and pressure!
It is dangerous to remove a device which is under pressure due to
the sudden release of pressure or discharge of medium.
• Before removing a device, switch off the pressure and vent the
lines.
replacement for control function a
→
Clamp the valve housing in a holding device
(applies only to valves not yet installed).
→
Pressurise control air connection
compressed air (5 bar) (see Fig. "Control air connection").
→
Loosen the four housing screws.
→
Remove the actuator from the housing.
→
Unbutton or unscrew old diaphragm. If attachment is with a
bayonet catch, remove the diaphragm by rotating it through 90°.
→
Install new diaphragm.
→
Align diaphragm.
the marker flap of the diaphragm must be perpendicular to
the direction of flow!
→
Place actuator back on the housing.
→
Insert the housing screws and lightly cross-tighten until the dia-
phragm is between the housing and actuator.
do not tighten the screws yet.
→
Actuate the diaphragm valve twice.
1 of the actuator with