Seat - Samson 3241-7 Mounting And Operating Instructions

Check whether the two washers (6.4)
are still in the plug stem extension (6.3).
Screw the plug stem firmly into the plug
stem extension (6.3); tightening torque is
50 Nm for Ø 10 mm and 80 Nm for
Ø 16 mm.
4
To complete assembly, refer to section
5.2.5.
Nominal sizes DN 200 to DN 300:
1. Remove the nuts (1.1).
2. Remove the intermediate piece (12) to-
gether with the plug stem and plug from
the valve body.
3. Remove gasket (1.2) and carefully clean
the sealing faces in the valve body and
on the intermediate piece.
4. Remove the hexagon head screws (3.7),
tension ring (3.5) and flange (3.6).
5. Unscrew the plug from the plug stem. To
do so, use a suitable tool to hold the
plug stem in place, so that the metal bel-
lows, which is welded onto the plug
stem, cannot be twisted.
6. Screw a new plug with tension ring and
flange to the plug stem.
4
To complete assembly, refer to section
5.2.5.
In the version with extension bonnet, there
are no parts 3.5, 3.6 and 3.7. Plug (3) and
plug stem(6) form one piece.

5.2.3 Seat

Replace the seat (2) as described in section
5.1.2.
Maintenance – Replacing parts
5.2.4 Metal bellows
Nominal sizes DN 15 to DN 150:
1. Unscrew the plug (3) together with the
plug stem (6) from the plug stem exten-
sion (6.3) as described for replacing the
seat in section 5.2.2.
2. Unscrew the nut (6.5) using a SAMSON
socket wrench (see EB 029 EN).
3. Pull the plug stem extension with the
welded-on metal bellows (6.6) out of the
intermediate section (12).
4. Clean the sealing faces on the intermedi-
ate piece.
5. Insert a new plug into the intermediate
piece and screw down the nut (6.5).
Caution!
Do not twist the metal bellows!
6. Check whether both washers (6.4) are
still in the plug stem extension (6.3).
Apply lubricant (order no. 8150-0111)
to the thread of the plug stem and firmly
screw the plug stem into the plug stem
extension (6.3) with a tightening torque
of 50 Nm for a plug stem diameter of
10 mm and 80 Nm for a diameter of
16 mm.
15
EB 8015 EN