Install The Actuator On Devices With A Welded Connection; Set Stroke Limit - Burkert 2920 Operating Instructions Manual

7.3 Install the actuator on devices with
a welded connection
→ Check and replace seal. Make certain that no remnants of seal
material get into the pipe system.
Fig. 8: Seal
WARNING
Danger due to incorrect lubricants.
Unsuitable lubricant may contaminate the medium. There is a risk
of explosion in oxygen applications.
▶ Only used accordingly approved lubricants for specific
applications.
→ Grease the external thread of the body connection (e.g. with
Klüberpaste UH1 96-402 from Klüber).
→ Screw actuator into valve body, noting the tightening torque in
accordance with "Tab. 7".
Nominal diameter Tightening torque
of valve body DN
10/15
20
14
Seal
Tolerance
[Nm]
45 ±3
50 ±3
english
Type 2920, 2921, 2960, 2961
Installation
Nominal diameter Tightening torque
of valve body DN
25
32
40
50
65
80
100
Tab. 7: Tightening torque values for screwing into the valve body
7.4

Set stroke limit

Setting the minimum and maximum stroke limit is possible as an
option. An adjusting sleeve is used for this purpose.
→ By turning the handwheel clockwise, the valve is moved to the
closed position.
→ Loosen the screw on the handwheel (hexagon socket, width
across flats 2) and remove handwheel.
→ Screw adjusting sleeve clockwise until it comes to a stop.
Minimum stroke is set.
→ Mount handwheel on actuator. The square on the spindle and the
hexagon head of the adjusting sleeve must be correctly aligned
to the geometry of the handwheel so that they fit into each other.
→ Move the valve to the desired maximally open position.
Tolerance
[Nm]
60 ±3
65 ±3
65 ±3
70 ±3
100 ±3
120 ±5
150 ±5