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1. Close the shut-off valves in the pipeline
at the inlet and outlet of the plant section
while the valve is being installed.
2. Prepare the relevant section of the pipe-
line for installing the components.
3. Remove any protective caps before in-
stalling the components.
4. Lift the silencer using suitable lifting
equipment to the site of installation (see
information under 'Lifting the silencer' in
the 'Shipment and on-site transport' sec-
tion). Pay attention to the directions of
flow for the silencer and valve before lift-
ing. Both directional arrows must point in
the same direction.
5. Use the correct flange gaskets.
6. Install the valve and silencer free of
stress. Observe specified tightening
torques.
Versions with welding ends: weld the
valve and silencer free of stress into the
pipeline.
7. Attach a support or suspension on the
valve, if necessary.
EB 8084 EN
Flange
Attenuation
Valve outlet
plate
Gasket
Fig. 5-5: Valve flange and pipe flange, with
Type 3381‑1 Silencer inbetween
b) Type 3381-3-X
See Fig. 5-6
Studs
On the
valve
side
Gasket
Housing
Fig. 5-6: Type 3381‑3‑2 Silencer before instal-
lation
Removing the studs
Î Before mounting the silencer onto the
valve and installing it into the pipeline,
Installation
Flange
Pipeline
Gasket
Attenuation plate
Gasket
On the
pipeline
side
Studs
5-5
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