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Operation
5 Operation
See Fig. 1 and Fig. 2.
5.1 Start-up
Do not start up the regulator until all parts
have been mounted (e.g. valve and control
line). Open control line with needle valve
and check to ensure it is connected correctly.
Rinsing the plant · After filling the plant, first
completely open the consumer and adjust the
regulators to achieve the maximum flow rate.
Rinse out the pipeline at full flow rate for sev-
eral minutes. Check the installed strainer
(e.g. by measuring the pressure drop). Clean
the strainer, if necessary.
− Slowly fill the plant. Make sure that the
pressure rises simultaneously upstream
and downstream of the regulator to
avoid damaging the balancing bellows/
diaphragm.
− Open all the valves on the consumer
side. Slowly open the shut-off valves
starting on the flow pipe side in small
steps waiting a few minutes in between.
12
5.2 Pressure test
Note
The plant operator is responsible for
performing the pressure test. SAMSON's
After-sales Service can support you to plan
and perform a pressure test for your plant.
NOTICE
!
Risk of valve damage due to a sudden
pressure increase and resulting high flow
velocities.
− Slowly open the shut-off valves.
− The main valve is closed by the internal
set point spring (3.1).
During the pressure test, make sure the fol-
lowing conditions are met:
Î Do not allow the pressure to exceed the
1.5 times the pressure rating of the valve
body.
Î Unscrew the control lines from the main
valve for the upstream pressure p
downstream pressure p
openings at the main valve with screw
plugs G ¼ (DN 15 to 100) or G
(DN 125 to 250).
Î Make sure that the pressure rises simulta-
neously upstream and downstream of the
regulator to avoid damaging the balanc-
ing bellows or diaphragm.
and
1
and seal the
2
3
/
8
EB 2552-1 EN
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