Burkert 2103 Manuel D'utilisation page 43

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 body in a holding device
(applies only to valves not yet installed).
noTiCe!
damage to the diaphragm or the seat contour!
• When removing the actuator, ensure that the valve is in open
position.
→
Pressurize pilot air port 1 of the actuator with compressed air (5
bar): valve opens.
→
Loosen the four body screws.
→
Remove the actuator from the body.
→
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 (see "Fig. 33: Repairs")!
→
Place actuator back on the body.
Type 2103
Repairs
→
Insert the body screws and lightly cross-tighten until the dia-
phragm is between the body and actuator.
do not tighten the screws yet.
→
Actuate the diaphragm valve twice.
→
Without pressurization tighten the body screws to the per-
mitted tightening torque (see "Tab. 16: Tightening torques for
diaphragms").
Pilot air port CF A, CF B, CF I
Air discharge connection CF A, CF B
Pilot air port CF I
Diaphragm
Valve body
Body screws
Marker flap of the
diaphragm
Fig. 33: Repairs
english
1
2
Actuator
(4x)
43