Burkert 2030 Manuel D'utilisation page 31

Types 2030, 2031, 2031 K
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
"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 "Table 10: Fastening types for diaphragms").
→
Install new diaphragm in actuator (see
types 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 "Table 11: Tightening torques
for diaphragms").
Repairs
"Table 10: Fastening
→
Pressurize lower control air connection with compressed air (value
as indicated on the rating plate).
→
Check the tightening torque of the screws again.
replacement of the diaphragm for control functions B and i
→
Clamp the valve housing in a holding device.
(applies only to valves not yet installed).
→
Loosen the fastening screws crosswise and remove actuator
together with diaphragm from the housing.
→
Unbutton or unscrew old diaphragm. If attachment is with a
bayonet catch, remove the diaphragm by rotating it through 90°
(see "Table 10: Fastening types for diaphragms").
→
Install new diaphragm in actuator (see
types for diaphragms").
→
Align diaphragm.
Observe mark tab for direction of flow!
→
Place actuator back on the housing.
→
Lightly cross-tighten the housing screws without pressurization
until the diaphragm is between the housing and actuator.
do not tighten the screws yet.
→
Pressurize upper control air connection with compressed air
(value as indicated on the rating plate) (see "Fig. 8: Control air
connection").
→
Actuate the diaphragm valve twice.
→
Tighten the housing screws to the permitted tightening torque
(see "Table 11: Tightening torques for diaphragms").
English
"Table 10: Fastening
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