EB 8048 EN
41
Servicing
Risk of contamination of the process me-
dium through the use of unsuitable lubri-
cants and/or contaminated tools and com-
ponents.
Î
Keep the valve and the tools used free
from solvents and grease.
Î
Make sure that only suitable lubricants
are used (
u
The control valve was checked by SAMSON
before it left the factory.
− Certain test results certified by SAMSON
lose their validity when the valve is
opened. Such testing includes seat leakage
and leak tests.
− 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.
−
Only use original spare parts by
SAMSON, which comply with the original
specifications.
9.1 Periodic testing
Depending on the operating conditions,
check the valve at certain intervals to prevent
a possible failure before it can occur. Opera-
tors are responsible for drawing up an in-
spection and test plan.
Our after-sales service can support you in
drawing up an inspection and test plan for
your plant.
9.2 Preparing the valve for
service work
Standard version
1.
Put the control valve out of operation (see
section 10).
2.
Remove the actuator from the valve. See
associated actuator documentation.
3.
Unthread the lock nut (6.2) and stem
connector nut (6.1) from the plug stem
(6).
4.
Undo the clamp connection between the
valve body (1) and valve bonnet (5).
5.
Lift the valve bonnet (5) together with the
plug stem (6), plug (3) and diaphragm
(6.3) off the body (1).
6.
Pull the plug (3) with plug stem (6) and
diaphragm (6.3) out of the valve bonnet
(5).
Special version
1.
Put the control valve out of operation (see
section 10).
2.
Remove the actuator from the valve. See
associated actuator documentation.
3.
Unthread the lock nut (6.2) and stem
connector nut (6.1) from the plug stem
(6).
4. Undo the hex screws (5.4).
NOTICE
!
Note
Tip
