bürkert 2030 Bedienungsanleitung Seite 26

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 pilot air port with compressed air (value as
indicated on the type label). 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.
→ Unscrew the old diaphragm. If attachment is with a bayonet
catch, remove the diaphragm by rotating it through 90° ("Tab.
8").
→ Install new diaphragm in actuator ("Tab. 8").
NOTE!
For diaphragms with threated connection:
If the pin is live, the diaphragm may be damaged.
▶ ▶ First▶screw▶on▶the▶diaphragm▶hand-tight,▶then▶loosen▶it▶by▶one-
half▶turn▶counterclockwise.
→ Align diaphragm. Mark tab vertical to the flow direction.
→ Place actuator together with diaphragm back on the body.
→ Lightly cross-tighten the body screws until the diaphragm lies
between the body and actuator.
Do not tighten the screws yet.
→ Actuate the diaphragm valve twice to position the diaphragm
correctly.
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english
Type 2030, 2031, 2032, 2033,
Electricalconnection
→ Tighten body screws without pressurization in diagonal pairs
in three stages (approx. 1/3, approx. 2/3, 3/3 of the tightening
torque), according to "Tab. 7". The diaphragm should be posi-
tioned and pressed evenly all around the actuator and body.
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.
→ Unscrew old diaphragm. If attachment is with a bayonet
catch, remove the diaphragm by rotating it through 90° ("Tab.
8").
→ Install new diaphragm in actuator ("Tab. 8").
NOTE!
For diaphragms with threated connection:
If the pin is live, the diaphragm may be damaged.
▶ ▶ First▶screw▶on▶the▶diaphragm▶hand-tight,▶then▶loosen▶it▶by▶one-
half▶turn▶counterclockwise.
→ Align diaphragm. Mark tab vertical to the flow direction.
→ Place actuator together with diaphragm back on the body.
→ Lightly cross-tighten the body screws without pressurization
until the diaphragm lies between the body and actuator.
Do not tighten the screws yet.
→ Pressurize upper pilot air port with compressed air (value as
indicated on the type label) .
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