Burkert Type 2037 - Manual (Page 24)

24
Repairs
replacement of the diaphragm for control function a
→
Clamp the valve body in a holding device.
(applies only to valves not yet installed).
→
Pressurize lower control air connection with compressed air
(value as indicated on the type label) (see picture below “Fig.
20”).
This is required to detach the diaphragm without damage from
the body.
→
Loosen fastening screws crosswise and remove actuator
together with diaphragm from the body.
→
Unbutton or unscrew the old diaphragm. If attachment is with a
bayonet catch, remove the diaphragm by rotating it through 90°
(see “Tab. 8”).
→
Install new diaphragm in actuator (see “Tab. 8”).
→
Align diaphragm.
observe mark tab for direction of flow!
→
Place actuator back on the body.
→
Lightly cross-tighten the body screws until the diaphragm is
between the body and actuator.
do not tighten the screws yet.
→
Actuate the diaphragm valve twice to position the diaphragm
correctly.
→
Without applying pressure, tighten the body screws to the permitted
tightening torque (see “Tab. 7”).
→
Pressurize lower control air connection with compressed air (value
as indicated on the type label).
→
Check the tightening torque of the screws again.
replacement of the diaphragm for control functions B and I
→
Clamp the valve body in a holding device.
(applies only to valves not yet installed).
→
Loosen the fastening screws crosswise and remove actuator
together with diaphragm from the body.
→
Unbutton or unscrew old diaphragm. If attachment is with a
bayonet catch, remove the diaphragm by rotating it through 90°
(see “Tab. 8”).
→
Install new diaphragm in actuator (see “Tab. 8”).
→
Align diaphragm.
observe mark tab for direction of flow!
→
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 the screws yet.
→
Pressurize upper control air connection with compressed air (value
as indicated on the type label) (see “Fig. 17”).
→
Actuate the diaphragm valve twice.
→
Tighten the body screws to the permitted tightening torque (see
“Tab. 7”).
english
Type 2030, 2031, 2031 K, 2032,
2033, 2037