Burkert 2030 Manuel D'utilisation page 33

Types 2030, 2031, 2031 K, 2032,
example
Housing
4 fastening
screws
Mark tab for direction
Fig. 30: Replacement of diaphragm
2033, 2037
Repairs
Upper control air con-
nection
(for CFB and CFI)
Lower control air con-
nection
(for CFA and CFI)
Diaphragm
of flow
replacement of the diaphragm for control function a
→
Clamp the valve housing in a holding device (applies only to valves
not yet installed).
→
Pressurize lower control air connection with compressed air (value
as indicated on the rating plate) (see picture below Fig. 31:Control
air connection). This is required to detach the diaphragm without
damage from the housing.
→
Loosen fastening screws crosswise and remove actuator together
with diaphragm from the housing.
→
Unbutton or unscrew the 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
for diaphragms).
→
Align diaphragm.
Observe mark tab for direction of flow!
→
Place actuator back on the housing.
→
Lightly cross-tighten the housing screws until the diaphragm is
between the housing and actuator.
do not tighten the screws yet.
→
Actuate the diaphragm valve twice to position the diaphragm
correctly.
→
Without applying pressure, tighten the housing screws to the
permitted tightening torque (see Tab. 11:Tightening torques for
diaphragms).
→
Pressurize lower control air connection with compressed air (value
as indicated on the rating plate).
English
Tab. 10:Fastening types
33