Samson 3241, Монтаж и эксплуатация

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EB 8012 EN 33
Mounting and start-up
5.2.2 Additional fittings
Strainers
We recommend installing a SAMSON
strainer upstream of the valve. It prevents sol-
id particles in the process medium from
damaging the valve.
Bypass and shut-off valves
We recommend installing a shut-off valve
both upstream of the strainer and down-
stream of the valve and setting up a bypass
line. The bypass line ensures that the plant
does not need to be shut down for service
and repair work on the valve.
Insulation
Only insulate control valves with insulating
section or bellows seal up to the bonnet
flange of the valve body for medium tem-
peratures below 0 °C (32 °F) and above
220 °C (428 °F).
Do not insulate valves mounted to comply
with NACE MR 0175 requirements.
Test connection
Versions with bellows seal fitted with a test
connection (G
1 /
8
) at the top flange allow the
tightness of the bellows to be monitored.
Particularly for liquids and vapors, we rec-
ommend installing a suitable leakage indica-
tor (e.g. a contact pressure gauge, an outlet
to an open vessel or an inspection glass).
WARNING!
Risk of personal injury due to compo-
nents under pressure and process
medium escaping under pressure.
Do not loosen the screw of the test
connection while the valve is in oper-
ation.
Safety guard
To reduce the crush hazard arising from
moving parts (actuator and plug stem), a
safety guard can be installed.
Noise emission
Trims with flow dividers can be used to re-
duce noise emission (see
u
T 8081).
5.2.3 Installing the control
valve
Version with flanges
1. Close the shut-off valve in the pipeline
while the valve is being installed.
2. Remove the protective caps from the
valve ports before installing the valve.
3. Lift the valve using suitable lifting equip-
ment to the site of installation (see sec-
tion 4.2.2). Observe the flow direction
through the valve. The arrow on the
valve indicates the direction of flow.
4. Make sure that the correct flange gaskets
are used.
5. Bolt the pipe to the valve free of stress.