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Servicing
NOTICE
!
Risk of valve damage due to the use of un‑
suitable tools.
Only use tools approved by SAMSON
(u AB 0100).
NOTICE
!
Risk of valve damage due to the use of un‑
suitable lubricants.
Only use lubricants approved by SAMSON
(u AB 0100).
Note
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.
− After completing servicing work, the gas‑
tight shut‑off of the valve must be tested.
This test must be performed by fully
trained, qualified operating personnel.
− The product warranty becomes void if ser‑
vice or repair work not described in these
instructions is performed without prior
agreement by SAMSON's after‑sales ser‑
vice.
− Only use original spare parts by
SAMSON, which comply with the original
specifications.
38
7.1 Replacing the gasket
1. Remove the actuator from the valve. See
associated actuator documentation.
2. Undo the body nuts (14) gradually in a
crisscross pattern.
3. Lift the bellows seal (22) with valve bon‑
net (2) and plug with plug stem (5) off
the body (1).
4. Remove the gasket (17). Carefully clean
the sealing faces in the valve body (1)
and on the bellows seal (22).
5. Insert a new gasket (17) into the body.
6. Place the bellows seal (22) with valve
bonnet (2) and plug with plug stem (5)
onto the body.
Version with V-port plug: place the as‑
sembly onto the valve body, making sure
that the largest V‑shaped port of the
V‑port plug faces toward the valve outlet.
See section 7.3.
7. Firmly press the plug (5) into the seat (4).
Fasten down the bellows seal (22) with
the body nuts (14). Tighten the nuts
gradually in a crisscross pattern. Ob‑
serve tightening torques.
8. Mount actuator. See associated actuator
documentation.
9. Adjust lower or upper signal bench
range. See associated actuator docu‑
mentation.
10. Check the control valve. See section 7.5.
EB 8020-1 EN
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