Table of Contents
Advertisement
Operation
Procedure for the Type 45-2 and Type 45-4
Regulators
See Fig. 7-1 and Fig. 7-2.
Adjust the required set point by tensioning
the set point springs (10) at the set point ad-
juster (9) or manual adjuster (19).
For smaller differential pressure set points,
we recommend using a differential pressure
pressure gauge instead of the pressure
gauges (3 and 5) to check the pressure.
1. Close the shut-off valves or the bypass to
reduce the maximum flow rate to ap-
prox. 5 to 10 %.
If you are using a motorized valve, close
it to approx. 10 % of its travel.
2. Relieve the tension from the set point
springs (10).
3. Slightly open the motorized valve (ap-
prox. 10 % valve travel). See Fig. 7-3.
4. Adjust the differential pressure by turning
the set point adjuster (9) or manual ad-
juster (19) to load the set point springs:
− Turn the set point adjuster (9) or
manual adjuster (19) clockwise ()
to increase the pressure set point.
− Turn the set point adjuster (9) or
manual adjuster (19) counterclock-
wise () to reduce the pressure set
point.
Change the plant throughput (e.g. by open-
ing and closing the consumer valve) to check
the adjusted differential pressure at the regu-
lator. Correct it, if necessary.
7-2
For regulators with manual adjuster, the set
point spring is installed in the bottom section
of the valve body (see Fig. 7-1). The set point
can be continuously adjusted using the set
point adjuster/manual adjuster according to
the value on the scale (see Fig. 7-2).
Note
The maximum value on the scale of the
manual adjuster is 8. However, the
maximum set point is reached earlier (see
Fig. 7-1).
One turn of the manual adjuster will change
the differential pressure by approx.
0.033 bar in the range from 0.2 to 1 bar
and by approx. 0.02 bar in the range from
0.2 to 0.6 bar.
NOTICE
!
Risk of regulator malfunction due to incor-
rect setting.
A scale value below 1 may lead to incorrect
control.
Only adjust values above 1 on the scale.
If the setting is incorrect (value on the scale
below 1), proceed as follows:
− Depressurize the regulator.
− Turn the set point adjuster counterclockwise
() as far as it will go (minimum setting).
− Turn the set point adjuster back clockwise
to a value between 1 to 2 on the scale.
The set point can now be adjusted.
EB 3124 EN
Advertisement
Table of Contents
