Burkert 2103 Manuel D'utilisation page 32

Installation for actuator with control functions B and I:
→
Lightly cross-tighten the body screws without pressurization until
the diaphragm is between the body and actuator.
Do not tighten the screws yet.
→
Pressurize pilot air port 1 of the actuator with compressed air
(5 bar).
→
Actuate the diaphragm valve twice.
→
Tighten the body screws to the permitted tightening torque (see
"Tab. 14: Tightening torques for diaphragms").
Pilot air port
CFA, CFB, CFI
Fig. 37: Pilot air port
Orifice DN Tightening torques for diaphragms [Nm]
(diaphragm size)
EPDM/FKM
[mm]
8 2.5
15 3.5
20 4
25 5
40 8
50 12
Tab. 14: Tightening torques for diaphragms
32
1
PTFE / advanced
PTFE / laminated
advanced PTFE
2.5
4
4.5
6
10
15
english
Type 2103, 2104, 2105
Installation
8.7.4 Align actuator
If valves feature a VA diaphragm socket, the actuator for the
valve body can be rotated steplessly by 360 °
(VA = stainless steel).
→
Rotate actuator using a hook wrench. See "Fig. 38".
Rotate actuator only as far as required! (max. 360 °).
Recommended
hook wrenches as
per DIN 1810.
Actuator size:
ø 50 = A 52 - 55,
ø 70 - 130 = A 68 - 75
Fig. 38: Align actuator