Burkert 2103 Manuel D'utilisation page 38

DANGER!
Risk of injury from discharge of medium and pressure!
It is dangerous to remove a product which is under pressure due
to the sudden release of pressure or discharge of medium.
▶ Before removing a product, switch off the pressure and vent the
lines.
Replacement for control function A
→
Clamp the valve body in a holding product
(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. 40")!
→
Place actuator back on the body.
38
english
Type 2103, 2104, 2105
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 CFA, CFB, CFI
Air discharge connection CFA, CFB
Pilot air port CFI
Diaphragm
Valve body
Body screws
Marker flap of the
diaphragm
Fig. 40: Repairs
1
2
Actuator
(4x)