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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. Correctly decontaminate, rinse and ventilate the plant or
plant component.
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. Clamp the butterfly valve 1 centrally between the pipes
with flanges 2 and 3.
10. Centre the seals 4 accurately. Select seals according to
medium (TFM/PTFE/graphite).
▶ Seals are not included in the scope of delivery.
2 4
1
4 3
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.
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CAUTION
NOTICE
5 4
13. Slightly tighten the bolts 4 and nuts 5 diagonally.
14. Fully open the disc and check the alignment of the piping.
15. Tighten the nuts 5 diagonally until the flanges fit tightly on
the body.
Observe the permissible tightening torque of the bolts
(see "Mechanical data").
10.4 Installation of the ATEX version
1. Install the butterfly valve, see chapter "Installation of the
standard version".
2. Connect the earthing cable of the butterfly valve to the
earth terminal of the plant.
3. Test the resistance between the earthing cable and actu-
ator shaft (value <106 Ω, typical value <5 Ω).
21 / 31
10 Installation in piping
GEMÜ R477 Tugela
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