Seat And/Or Plug - Samson 3241-7 Mounting And Operating Instructions

Maintenance – Replacing parts
8. Insert new flat gasket (1.2) into the
body. Carefully place the valve bonnet
onto the valve body, making sure that
the large V-shaped port of the V-port
plug faces towards the valve outlet.
Secure with nuts (1.1).
9. Carefully slide the packing parts over the
plug stem into the packing chamber.
Keep the proper order. Screw in the
threaded bushing (5.2) and tighten.
10. Loosely screw the lock nut (6.2) and stem
connector nut (6.1) onto the plug stem.
11. Mount the actuator and adjust the upper
and lower bench range values as de-
scribed in section 2.1.

5.1.2 Seat and/or plug

We recommend you to also replace the
packing (4.2) when exchanging the seat
and plug.
To exchange the packing, proceed as de-
scribed in section 5.1.1.
Plug:
4
Remove the old plug and replace it with
a new plug with plug stem. It may be
possible to use the old plug again, pro-
vided it has been remachined properly.
Make sure the plug is installed in the
correct direction. Apply lubricant (order
no. 8150-0111) to the plug stem before
installation.
Remachining the plug
4
Slight damage at the facing of the plug
can be eliminated by re-turning it on a
lathe. Soft-sealing plugs can only be
12
EB 8015 EN
remachined until dimension x is reached,
and if the seat bore exceeds 12 mm. For
seat bores of 63 mm and larger, the en-
tire sealing ring can be exchanged, if
necessary (the plug parts are screwed to-
gether).
Seat:
4
Unscrew the seat (2) using the appropri-
ate seat wrench (see EB 029 EN).
Apply lubricant (order no. 8150-0119)
to the thread and sealing cone of the
new seat (or possibly the old seat when it
has been reworked or thoroughly
cleaned) and screw it in.
Micro-trim insert
In this version, the complete micro-trim ele-
ment (Fig. 2) can be unscrewed from the
valve body using a socket wrench (width
across flats 27) and disassembled for clean-
ing. If individual parts are damaged, ex-
change the entire micro-trim element.
x
Fig. 5 · Plug with soft sealing
Seat bore x [mm]
12 0.5
24...48 1.0
6...80 2.0
100...200 2.5