Burkert Type 2731 - Manual (Page 17)

→
Control function A pressurize the lower pilot air port with com-
pressed air (5 bar): valve opens.
→
Remove actuator with diaphragm by loosening the body screws.
Actuator
Body screws
Valve body
Lower pilot air port
Upper pilot air port
Diaphragm
Fig. 12: Installation
7.3 installation
WarNiNg!
risk of injury from improper installation!
Non-observance of the tightening torque is dangerous as the
device may be damaged.
▶ Observe the tightening torque (see “Tab. 8: Tightening torques
for diaphragms”).
7.3.1 installation of the valve body
Welded bodies
→
Weld valve body in pipeline system.
Other body versions
→
Connect body to pipeline.
7.3.2 installation of the actuator (welded
body)
installation for actuator with control function a:
NoTiCe!
damage to the diaphragm or the seat contour!
▶ When installing the actuator, ensure that the valve is in open
position.
→
Control function A pressurize the lower pilot air port with com-
pressed air (5 bar): valve opens.
→
Lightly cross-tighten the body screws until the diaphragm 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 permitted
tightening torque (see following table “Tab. 8: Tightening torques
for diaphragms”).
17
Installation
english
Type 2730 / 2731 DN 65-100