Installa on, Opera on and Maintenance Manual TD10/…‐en Rev.03/2018
Page 8
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ENGLISH
4.02 REPLACEMENT OF THE SEATS/PLUGS OF THE DIVERTER VALVE
By referring to Pic. 7 perform the following operations:
Unscrew the actuator from the valve body as described in the previous paragraph.
Loosen the nut (1) and fully unscrew the bolts (3).
Fully unscrew the bolts (4) by keeping the stem blocked (2)
Separate the bonnet group (5) from the valve body (6).
Remove the stem (2) provided with the upper plug (9) from the bonnet (5).
Unscrew the seats (7) and (8) by using the specific wrenches
Remove the lower plug (10)
If required, replace the seats (7) and (8)
Insert in the bonnet (5) the new plug group by paying attention to grease the stem with the silicone oil.
Always replace the body gasket (11) by carefully cleaning the supporting surfaces.
Re-assemble everything by repeating the operations in the reverse order by consequently paying attention
to the re-alignment of stems, seat and plug.
Gradually tighten the nuts (3) in criss-cross sequence, as indicated in the example in Pic.2 paragraph 2.01
by applying the torques indicated in chapter 5
Attention:
when the plug is being replaced it is required to replace also the packing gland (see next paragraphs).
Pic. 7 Diverter valve
1
3
4
2
6
5
7
8
9
10
11
13
14