Burkert Type 2037 - Manual (Page 12)

12
Assembly
mount actuator and diaphragm on the body:
→
After welding in the body, smooth the body surface by grinding if
required.
→
Carefully clean the body.
procedure for control function a
→
Pressurize the lower control air connection with compressed air
(value on type label) (see „Fig. 7: Control air connection“).
→
Place actuator on the body.
→
Gently tighten the body screws in diagonal pairs until the dia-
phragm lies between the body and actuator.
do not fully tighten 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. 2: Tightening torques for diaphragms“).
→
Pressurize the lower control air connection with compressed air
(value on type label).
→
Check the tightening torque of the screws again.
procedure for actuator with control functions b and i:
→
Place actuator on the body.
→
Gently tighten the body screws in diagonal pairs without pres-
surization until the diaphragm is between the body and actuator.
do not fully tighten screws yet.
→
Pressurize the lower control air connection with compressed air
(value on type label) (see following „Fig. 7: Control air connection“).
→
Actuate the diaphragm valve twice.
→
Tighten the body screws to the permitted tightening torque
(see „Tab. 2: Tightening torques for diaphragms“).
Upper control air connection
(for CFB and CFI)
Lower control air connection
(for CFA and CFI)
Fig. 7: Control air connection
tightening torques for plastic body, Va tubular body (Va) and
forged body:
orifice
dn
[mm]
tightening torques for diaphragms [nm]
elastomer -
diaphragm ptFe-diaphragm
65 20 30
80 30 40
100 40 50
Tab. 2: Tightening torques for diaphragms
english
Type 2030, 2031, 2031 K, 2032,
2033, 2037