36
EB 2512 EN
Start-up and operation
6.3.1 Regulation of liquids
To start up the pressure reducing valve, open
shut-off valves
slowly
.
Î
For medium temperatures above 150 °C,
first fill the compensation chamber with
the process medium.
6.3.2 Regulation of steam
Unscrew filler plug (19) on the compensation
chamber (18). Use the included plastic fun-
nel or a jug to pour in water until it starts to
overflow. Screw the filler plug back in and
tighten it.
Î
All pipes conveying the process medium
must be completely drained and dry.
Î
Air and condensate must be allowed to
escape from the plant.
Î
Allow time for the pipes and valves to
heat up.
6.4 Adjusting the set point
Î
Refer to Fig. 9
Î
The required downstream pressure is set
by turning the set point adjuster (6) using
an open-end wrench:
−
DN 15 to 50 with width across flats
SW 19
−
DN 65 and 100 with width across flats
SW 24
−
The set point of the stainless steel regula-
tor must be adjusted using the rod in-
cluded.
Î
Turn the set point adjuster clockwise (
)
to increase the pressure set point.
Î
Turn the set point adjuster counterclock-
wise (
) to reduce the pressure set point.
The pressure gauge located on the down-
stream pressure side allows the adjusted set
point to be monitored.
An initial adjustment of the set point can also
be made by changing the spring tension un-
til the distance x (see Fig. 9 and Table 7) is
reached.
Note during initial set point adjustment that
only a rough set point adjustment is per-
formed by turning the set point adjustment
until the distance x is reached. The special
properties of the process medium and plant
are not taken into account in this case.
Check the pressure at the pressure gauge
downstream of the regulator for a precise set
point adjustment.
Note
X
Set point
adjuster (6)
Fig. 9:
Set point adjustment with dimension x
