SOMAS MTV - Replacing the Fire Safe Seat

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32
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Edition: 2021-04 Original document - Mi-205 EN
6.6 Replacing the Fire safe seat FSV
To replace the seat, the complete valve assembly is dismounted from the pipeline
(
➔ Chap. 6.1) and sometimes the actuator/gear must also be removed from the valve.
Attention!
To change the seat, the butterfly valve has to be safely fixed in a fastening device!
Danger!
Injury risk!
Pay attention when the disc is moving.
When the actuator is connected, make sure that hands, tools and other objects are kept away
from the area around a disc that is moving. The disc in a butterfly valve may act as a cutting
tool. Do not leave any foreign objects in the valve housing. The disc in a butterfly valve always
operates as a separate unit. Whether or not an actuator is installed makes no difference. The
position of the disc may change during transportation or when the butterfly valve is handled.
9 Screw 14. PTFE-seat
10 Cover plate 32. Fire safe seat
11 Support ring 33. Guide ring
Fig.6-7 Replacing the Fire safe seat