7. Mounting to valve AUMA worm gearboxes GS and primary reduction gearings VZ/GZ can be
operated in any mounting position.
.
For butterfly valves, the recommended mounting position is end position
CLOSED
(Prior to mounting, bring the gearbox to the mechanical end stop CLOSED by
turning the handwheel clockwise).
.
For ball valves, the recommended mounting position is end position OPEN
(Prior to mounting, bring the gearbox to the mechanical end stop OPEN by
turning the handwheel counterclockwise).
.
Alternatively, the limit stop housing can be turned up to the end position of the
respective valve.
.
Thoroughly degrease mounting faces of gearbox and valve.
.
Place coupling sleeve onto valve shaft and secure (refer to figure C, detail A or B),
ensure that dimensions X, Y, and Z are observed (refer to table 2).
.
Apply non-acidic grease at splines of coupling.
.
Mount gearbox on valve. Ensure that the spigot (if provided) mates uniformly in the
recess and that the mounting faces are in complete contact.
.
Fasten gearbox with bolts (quality min. 8.8) and lock washers.
.
Fasten bolts crosswise with a torque according to table 2.
Note:
Experience showed that it is very difficult to fasten bolts or nuts of 1-8 UNC or
larger with the defined torques. The worm gearbox may be moved radially against
the valve flange by accident.
To improve adhesion between valve and gearbox, we recommend to apply
Loctite 243 (or similar products) on mounting faces.
11
Operation instructions Worm gearboxes GS 50.3 – GS 250.3
A
X
B
Z
Y
Figure C
Coupling
Valve
Grub screw
Gearbox Dimensions Bolts Strength class
Grade 5
Flange type X
max
Y max Z max Qty. x threads
(UNC)
Fastening torque T
A
[Ft lbs.]
GS 50.3-FA10
14 5 61 4 x
3
8
- 16 33
GS 63.3-FA10
718 73 4 x
3
8
- 16 33
GS 63.3-FA12
10 13 76 4 x
1
2
- 13 78
GS 80.3-FA14
23 5 88 4 x
5
8
- 11 155
GS 100.3-FA14
22 13 123 4 x
5
8
- 11 155
GS 100.3-FA16
22 8 123 4 x
3
4
- 10 257
GS 125.3-FA16
17 35 126 4 x
3
4
- 10 257
GS 125.3-FA25
17 27 126 8 x
5
8
- 11 155
GS 160.3-FA25
15 11 130 8 x
5
8
- 11 155
GS 160.3-FA30
30 0 140 8 x
3
4
- 10 255
GS 200.3-FA30
19 19 160 8 x
3
4
- 10 255
GS 200.3-FA35
44 0 190 8 x 1 - 8 590
GS 250.3-FA35
8 8 220 8 x 1 - 8 590
GS 250.3-FA40
13 0 230 8 x 1
1
4
- 7 1,200
Table 2: Standard dry fastening torques for bolts
(32 pages)
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