4
6 MG 71 en
6. In case of use of studbolts for fixing the gearbox to the
valve, it is recommended to screw them into the bot-
tomflange of the gearbox before mounting the gearbox
on top of the valve.
7. Coat the valve stem and outer surface of the bushing (2)
and actuator bore with a suitable grease to aid fitting. The
plate (21) should be installed, when the bushing (2) is used,
between the valve flange mounting face. This plate locks
up the insert.
8. Mount the gearbox perpendicular to the valve (see
Figure 2).
9. Fix the gearbox to the valve with nut and ring. In case of
use of bolts, for the maximum screwdepth, see Table 2.
For tightening, refer to standard VDI 2230.
10. The assembly is now ready for adjustment (see Chapter
2.2).
2.2
Adjustment of the setscrews
The gearbox is mounted on top of valve (see installation).
1. Close the valve totally, by turning the handwheel clock-
wise.
2. The valve position is indicated by the arrow on the posi-
tion indicator.
3. Remove the plastic caps from the setscrews.
4. When the fully closed position can not be achieved, loosen
the setscrew-close (see Figure 3) by turning them coun-
terclockwise. Continue turning the handwheel until the
valve is totally closed. Please note, that the butterfly valves
need to be closed using a given torque, see the tables in a
relevant valve manual.
5. Screw the set-screw back into the gearbox (by turning
clockwise) until blocked. Secure the setscrew– close
with the nut.
6. Open the valve by turning the handwheel counterclock-
wise.
7. When it can not be achieved to open the valve totally
(90°), loosen the setscrew-open (see Figure 3) by turning
it counterclockwise. Continue turning the handwheel
until the valve is totally opened.
8. Screw the set-screw back into the gearbox (by turning
clockwise) until blocked. Secure the setscrew– open
with the nut.
9. Close the valve with the handwheel
Fig. 1
Mounting handwheel
Table 2
Max. screw depths
Mounting
F05
F07
F10
F12
F14
F16
F25
Max. screw depth
8
11
13
16
18
18
18
Fig. 2
Gearbox perpendicular to the valve
1
3
4
7
8
A
A
2
Part 2 depends on model and
part 21 must be mounted only
together with part 2.
Note:
21
Lubrication around Cortec VCI-369 or suitable grease
Depends on construction
Depends on construction
A - A
A - A
M-SERIES WITH INSERT
M-SERIES WITHOUT INSERT
(PART NO. 2)