Installation Of The Standard Version - GEM R481 Victoria Operating Instructions Manual

4. The inside diameter of the piping must match the nominal
diameter of the GEMÜ product.
5. The diameter of the pipe flanges should be, in compliance
with the respective nominal size, between "D max" and "D
min" (see table).
Flange
Flange
DN
25 32
40 47
50 60
65 74
80 96
100 113
125 140
150 169
200 223
250 273
300 323
350 363
400 417
450 465
500 518
600 618
Dimensions in mm
www.gemu-group.com
Dia. D min
Butterfly valve
Shut-off seal
Dia. D max
D max D min
13
29
33
53
72
92
118
146
197
247
297
335
384
432
485
580

10.3 Installation of the standard version

Damage!
▶ Before carrying out any welding on the piping, remove the
butterfly valve to prevent damage to the liner.
1. Shut off plant or plant component.
2. Secure against recommissioning.
3. Depressurize the plant or plant component.
4. Completely drain the plant or plant component and allow it
to cool down until the temperature is below the media va-
porization temperature and cannot cause scalding.
5. Decontaminate, rinse and ventilate the plant or plant com-
ponent properly.
6. Check flange faces for potential damage.
7. Remove any rough areas (rust, dirt, etc.) from the pipe
flanges.
8. Sufficiently spread the pipe flanges.
9. Do not use any flange seals.
10. Clamp the butterfly valve 1 centrally between the pipes
with flanges 2 and 3.
2
11. Slightly open the butterfly valve 1. The disc must not pro-
ject from the body.
12. Insert bolts 4 in all holes in the flange.
67 / 84
10 Installation in piping
CAUTION
3
1
GEMÜ R481 Victoria