Installation - Burkert 2712 Manuel D'utilisation

C
OMMISSIONING
Installation of the valve
Installation in any orientation, but preferably with the actuator above.
Observe the direction of flow: with control valves the general rule is: inlet under seat!
Clean piping from contamination!
Before attaching the valve housing, make sure the piping is aligned!
If the housing is to be welded on, make absolutely sure that the drive unit is removed beforehand.
Procedure:
1. Remove the electrical and pneumatic supplies from the
Top Control .
2. Pull off the pneumatic hose between Top Control and actuator
at the control port of the latter.
3. Control function A:
Pressurize the lower control port of the actuator with
compressed air (6 bar), so that the control cone is lifted from
the valve seat and is not damaged.
Control function B:
With control function B, no compressed air must be applied
for this purpose.
4. Remove the actuator in the open valve position by
unscrewing the threaded nipple (SW70) from the housing.
ATTENTION!
Do not loosen the screw (SW65) above the
threaded nipple!
5. Before reinstalling the actuator (in the open valve position), grease the nipple thread with
stainless steel lubricant, e.g. Klüberpaste UH1 96-402 from Messrs. Klüber and replace
the graphite seal.
ATTENTION!
For special applications such as for oxygen and analysis, use only the approved
lubricants.
6. After tightening the threaded nipple (observe torque), the actuator can be aligned as required.
For this purpose, unscrew the screw (SW65) above the threaded nipple ca. a half-turn and bring the
actuator into the desired position.
Then retighten the screw with a torque of 100 ± 5 Nm.
ATTENTION!
During this operation, the valve must also be in the open position.
Tightening torques for the threaded nipple (SW70)
DN
Tightening torque
[Nm]
NOTE
For applications in aggressive media, we recommaend attaching all free pneumatic
connections to a pneumatic hose whose other end lies in a neutral atmosphere.
8 - 2712 big
65 80
100 ± 5 120 ± 5 150 ± 5
actuator
lower
control port
screw
(SW65)
threaded nipple
(SW70)
housing
100
Top Control