Samson 2405 Series, Mounting And Operating Instruction

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24 EB 2520 EN
Mounting and start-up
5.2 Quick check
Pressure test
A pressure test of the plant with the regulator
already installed is only permissible up to the
nominal pressure of the valve (see Table 1).
The pressure at the operating diaphragm
must not exceed the maximum permissible
pressure. If this cannot be guaranteed, pro-
ceed as follows: unscrew the control line at
the actuator and seal the open control line.
In case pressure surges are expected to oc-
cur during start-up or during operation, in-
stall a regulator with integrated force limiter
(special version, see Table 1).
All plant components must be designed for
the test pressure.
5.3 Putting the regulator into
operation
1. Make sure the control line is correctly
connected and free of dirt. The cross-sec-
tional area of flow must be open.
2. Slowly open the shut-off valves on the
upstream pressure side.
3. Open all the valves on the consumer side
(downstream of the regulator). Avoid
pressure surges.
5.4 Adjusting the set point
The regulator in the delivered state does not
have a defined pressure set point. The set
point spring is released of tension. The set
point must be adjusted on starting up the
plant.
Adjusting screw
(8), SW 27
Fig. 12: Set point adjustment (view from
above)
Adjust the required set point (see Fig. 12) by
tensioning the set point springs (7) at the set
point adjuster (8) using a suitable socket
wrench (width across flats 27).
1. Remove the cap (12).
2.
Use a socket wrench (SW 27) to turn the
screw (8).
Turn clockwise (

) to increase the pres-
sure set point (the downstream pressure
increases).
Turn counterclockwise (

) to reduce the
pressure set point (the downstream pres-
sure drops).
3. Remount the cap (12).