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7 Operation
Immediately after completing start-up or
placing the regulator back into service (see
the 'Start-up' section), the regulator is ready
for use.
WARNING
!
Risk of burn injuries due to hot or cold com-
ponents and pipeline.
Regulator components and the pipeline may
become very hot or cold. Risk of burn inju-
ries.
Î Allow components and pipelines to cool
down or warm up to the ambient tem-
perature.
Î Wear protective clothing and safety
gloves.
WARNING
!
Risk of personal injury due to pressurized
components and process medium being dis-
charged.
Î Do not loosen the control line while the
valve is pressurized.
WARNING
!
Risk of hearing loss or deafness due to loud
noise.
Noise emission (e.g. cavitation or flashing)
may occur during operation caused by the
process medium and the operating condi-
tions.
Î Wear hearing protection when working
near the valve.
EB 2540 EN
7.1 Adjusting the set point
Adjust the set point by tensioning the set
point springs (2.1) at the set point adjuster
(2.3) (adjusting screw) on the pilot valve (2).
The pilot valve governs internally the control
pressure p
for the main valve and regulates
S
the pressure to the adjusted set point pres-
sure.
Note
While the set point is being adjusted, at least
5 to 10 % of the maximum flow rate expect-
ed in the operating state must flow through
the regulator.
If the regulator has not been delivered with a
ready-adjusted set point, proceed as follows:
How to proceed:
1. Remove the cap (2.5) from the pilot
valve.
2. Adjust the required upstream pressure set
point while the plant (consumer) is open
by turning the adjusting screw (2.3). See
Fig. 7-3.
− Turn clockwise () to increase the pres-
sure set point (the pressure rises).
− Turn counterclockwise () to reduce the
pressure set point (the pressure drops).
Operation
7-1
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