Drehmo D 30 - Assembly

Valve attachment
16
Figure10: Rain protection hood
[1]
[2]
[3]
[1] Fan cover [2] Rain protection hood
[3] Lugs
4.6
Assembly
Direct mounting For direct mounting, the actuator is fitted without intermediate gearing to the valve. For
this purpose, part-turn actuators are equipped with an unbored (standard) output drive
plug sleeve. The output drive plug sleeve is equipped with splines on the outside (to
be coated with appropriate grease prior to assembly) and can therefore be inserted
into the actuator at different angles. As standard, multi-turn actuators are equipped
with output drive type B3. On request, output drive types A, B1, B2, B4, C, D and E
are also available.
Align actuator on valve, then rotate the device until fixing holes of actuator and valve
align and the output drive is correctly placed on the valve flange. Fasten actuator
crosswise to valve using appropriate screws.
Output drive type A is an exception. First fasten output drive on the stem until it is
flush on the valve. Rotate the drive assembly down the valve shaft to mate with the
valve flange. Align the fixings and attach loosely, rotate the drive coupling to take up
the free play and ensure close coupling of the flanges, before fastening tightly. Then
the actuator is placed on the drive assembly and can be rotated to the correct position
via the handwheel. Finally screw the flange tightly to the actuator.
Table3: Tightening torques
Screw strength class 8.8 (µ
G
≈0.12)
Threads M6 M8 M10 M12 M14 M16 M18 M20 M30 M36
Tightening
torques in
Nm
10 25 49 85 135 210 300 425 1,450 2,600
The part-turn actuator is mounted to the valve using an output drive plug sleeve. Heed
the fitting dimensions according to Assembly [}17].
Figure11: Sectional view of various couplings
[1]
[2]
[3]
[4]
[1][1]
[2][2]
[3]
X
Y
Z
[1] Coupling [2] Valve shaft
[3] Grub screw [4] Screw