23
Installation
procedure for control function a
Pressurize lower control air connection with compressed air (value as indicated on the rating plate) (see
→
Figure 15: Control air connection
).
Place actuator 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
→
Pressurize lower control air connection with compressed air (value as indicated on the rating plate).
→
Check the tightening torque of the screws again.
→
procedure for actuator with control functions B and i:
Place actuator 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 picture
→
Figure 15: Control air connection
Actuate the diaphragm valve twice.
→
Tighten the housing screws to the permitted tightening torque
→
(see
Table 7: Tightening torques for
Upper control air connection
(for CFB and CFI)
Lower control air connection
(for SFA and SFI)
Figure 15:
Control air connection
tightening torques for plastic housing, Va tubular housing (Va) and forged housing
dn
tightening torque [nm] (values for guidance)
elastomer - diaphragm
ptfe - diaphragm
65
20
30
80
30
40
100
40
50
Table 7:
Tightening torques for diaphragms
english
Type 2030, 2031, 2031 K, 2032,
2033, 2037
