EB 8140 EN
23
Servicing
−
The product warranty becomes void if
service or repair work not described in
these instructions is performed without
prior agreement by SAMSON's After-sales
Service department.
−
Only use original spare parts by
SAMSON, which comply with the original
specifications.
7.1 Replacing the gaskets
1. Undo the body nuts (1.1) gradually in a
crisscross pattern.
2.
Lift the valve bonnet (3) together with the
plug (2) off the body (1).
3. Remove the body gasket (3.1). Carefully
clean the sealing faces in the valve body
and seat bore.
4. Unscrew the countersunk screw (2.1) us-
ing a 3 mm hex screwdriver, while hold
-
ing the plug/actuator stem (2) stationary
at the flattened part with an open-end
wrench.
5. Remove the PTFE seal (2.2) and plug disk
(2.3). Thoroughly clean the plug disk.
6. Insert a new PTFE seal (2.2).
7. Insert the plug disk (2.3).
8. Tighten the countersunk screw (2.1) using
a 3 mm hex screwdriver, while holding
the plug/actuator stem (2) stationary at
the flattened part with an open-end
wrench.
9. Insert a new body gasket (3.1).
10. Place the valve bonnet (3) with plug (2)
onto the body (1).
1
Body
1.1
Body nut
2
Plug (with plug/
actuator stem)
2.1 Countersunk screw
2.2 PTFE seal
2.3 Plug disk
3
Valve bonnet
3.1
Body gasket (seal)
2
3
3.1
2.1
2.2
2.3
1.1
1
FE/NO
FA/NC
Fig. 4:
Replacing gaskets · DN 15 to 50
