Operation; Start-Up; Adjusting The Set Point - Samson 41-23 Mounting And Operating Instructions

5 Operation

5.1 Start-up

See Fig. 1 on page 7.
Cleaning the pipeline
Before start-up, we recommend cleaning the
pipeline with the regulator installed.
− Unscrew the control line.
− Seal the valve body with a G ¼ stopper.
− Check the mesh size of the upstream
strainer to determine the maximum parti-
cle size. Use a strainer (mesh size) suit-
able for the process medium.
If a malfunction occurs in the regulator after
the cleaning process due to clogging up,
proceed as described in Table 3 on page
14.
First start up the regulator after mounting all
parts. Make sure the control line is open and
correctly connected.
Fill the plant slowly with the process medium.
Avoid pressure surges. Open the shut-off
valves first on the upstream pressure side.
Afterwards, open all the valves on the con-
sumer side (downstream of the regulator).
NOTICE
The pressure at the actuator must not
exceed the permissible pressure on
testing the pressure of the plant (see
section 10).
Detach the control line and seal the
opening on the valve body with a
G ¼ stopper. Alternatively, install a
shut-off valve in the control line.
EB 2512 EN
Make sure that the pressure rises si-
multaneously upstream and down-
stream of the regulator to avoid dam-
aging the balancing bellows.
Do not exceed the maximum permis-
sible pressure (1.5 times the nominal
pressure of the valve body).
Regulation of steam
Unscrew filler plug (19) on the compensation
chamber. Use the included plastic funnel or a
jug to pour in water until it starts to overflow.
Screw the filler plug back in and tighten it.
The pressure reducing valve is now ready for
operation. Open the hand-operated shut-off
valves slowly to prevent water hammer.
Regulation of liquids
To start up the pressure reducing valve, open
shut-off valves slowly. For temperatures
above 150 °C, first fill the compensation
chamber with the process medium.

5.2 Adjusting the set point

See Fig. 1 on page 7.
The required downstream pressure is set by
turning the set point adjuster (6) using an
open-end wrench (up to DN 50 with width
across flats SW 19 and for DN 65 and larg-
er with SW 24). The set point of the stainless
steel regulator must be adjusted using the
rod included. Turn clockwise to increase the
downstream pressure and turn counterclock-
wise to reduce it.
Operation
11