Burkert Type 2105 - Manual (Page 39)

39
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”).
Actuator
Valve body
Air discharge connection CFA, CFB
Pilot air port CFI
Pilot air port CFA, CFB, CFI
2
1
Body screws
(4x)
Diaphragm
Marker flap of the
diaphragm
Fig. 39: Repairs
replacement for control functions B and i
→
Clamp the valve body in a holding product.
(applies only to valves not yet installed).
→
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. 39”)!
→
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 screws yet.
→
Pressurize pilot air port 1 of the actuator with compressed air
(5 bar) (see “Fig. 39”).
→
Actuate the diaphragm valve twice.
→
Tighten the body screws to the permitted tightening torque (see
“Tab. 16: Tightening torques for diaphragms”).
english
Type 2103, 2104, 2105