Replacing The Diaphragm - Burkert 2730 Manuel D'utilisation

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11.2. replacing the diaphragm
required spare part
• Diaphragm
fastening types
Orifice dn
fastening types for diaphragms
(diaphragm
ptfe
size)
15
Diaphragm buttoned
20
Diaphragm with bayonet
catch
25
32
Diaphragm with bayonet
40
catch
50
Tab. 13: Fastening types for diaphragms
Danger!
risk of injury from discharge of medium and pressure!
It is dangerous to remove a device which is under pressure due to
the sudden release of pressure or discharge of medium.
• Before removing a device, switch off the pressure and vent the
lines.
28
epdm / fkm
Diaphragm buttoned
Diaphragm screwed in
english
Type 2730 / 2731 / 2731K
Repairs
replacement for control function a
Clamp the valve body in a holding device
(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 lower pilot air port 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. 20")!
Place actuator back on the body.
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 control valve twice.
Without pressurization tighten the body screws to the per-
mitted tightening torque (see "Tab. 14: Tightening torques for
diaphragms").

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Ce manuel est également adapté pour:

27312731kDn 15Dn 50

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