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4
Operation · Set point
adjustment
See Fig. 2 on page 4.
The flow rate can be adjusted, both with and
without the electric actuator mounted. Prior to
adjusting the flow rate on a regulator with
the electric actuator mounted, make sure the
actuator stem (18) is retracted.
Note: Prior to starting up or pressurizing the
regulator, make sure that the restriction for
limiting the flow is open.
To adjust or alter the flow set point, proceed
as follows:
The set point adjustment is always based on
a closed restriction.
NOTICE
Use the SAMSON manual adjustment
(1790-8169) to close the restriction. Do not
use the set point screw (13).
Remove the manual adjustment again and
use an Allen key (4 mm) at the set point
screw (13) at the side to adjust the flow set
point.
4
Determine the number of turns required
to set the desired flow rate from the dia-
gram (Fig. 4).
4
Turn set point screw (13) counterclock-
wise the required number of turns.
For exact adjustment, check the set value
using a flow meter.
Operation · Set point adjustment
Turns of set point screw
5
K
4
3
2
1
0
0.1
0.2
Fig. 4 · Adjustment diagram for flow rate
4
Turn the set point screw (13) clockwise to
close the restriction and decrease the flow
rate.
4
Turn the set point screw counterclockwise
to open the restriction and increase the
flow rate.
5
Troubleshooting
If the flow rate deviates considerably from
the adjusted set point, first check the control
line for any blockages.
If the valve does not seal properly, this may
be because tight shut-off is prevented by dirt
between the seat and plug or due to natural
wear. Check the regulator for leaks and re-
place it, if necessary.
1.0
2.5
vs
0.5
1
2
EB 3136 EN
V ˚
3
m
/h
7
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