Pressure Gauge; Operation; Start-Up; Set Point Adjustment - Samson 42-36 Mounting And Operating Instructions

cleaning and maintenance, and when the
plant is not used for longer periods of time.
2.5

Pressure gauge

To monitor the pressures in the plant, install a
pressure gauge both upstream and down-
stream of the regulator.
3

Operation

3.1

Start-up

CAUTION!
First start up the regulator after mounting all
the components, e.g. valve, actuator and con-
trol line.
Make sure the control line (and needle valve)
is open and correctly connected before
start-up.
For media temperatures above 150 °C
(steam), fill the equalizing tank with the pro-
cess medium (water) before start-up.
Note: On filling the plant, make sure the re-
striction (1.1) is open by turning the adjust-
ment screw counterclockwise as far as it will
go.
4
Open all the valves on the consumer side.
Slowly open the shut-off valves starting on
the return flow pipe first. In case of valves
balanced by a bellows in DN 125 or
larger, vent the bellows housing at the
stopper (8) located at the side of the bel-
lows housing.
Rinsing the plant · After filling the plant, first
completely open the consumers. Open the re-
striction. Rinse out the pipeline at full flow rate
for several minutes. Check the installed
strainer (e.g. by measuring the pressure
drop) afterwards. Clean the strainer, if neces-
sary.
NOTICE
When testing the pressure of the plant when
the regulator is already installed, the pressure
must not exceed the nominal pressure of the
valve by 1.5 times nor the maximum permissi-
ble differential pressure in the actuator.
3.2

Set point adjustment

The control valves and shut-off valves as well
as all consumers or a bypass valve, if appli-
cable, must be opened to allow the maximum
flow rate to be reached.
Turn the restriction (1.1) until the required
flow rate is reached, by reading, for exam-
ple, the flow rate reading off a heat meter (re-
fer to Table 1 · Flow rate set point ranges).
Note: Always start the adjustment from a
closed restriction!
4
Turn clockwise to close the restriction. This
reduces the flow rate.
4
Turn counterclockwise to open the restric-
tion. This raises the flow rate.
You can also use the adjustment diagrams for
water in Figs. 5 to 7 to help you make the flow
rate adjustment.
Operation
9
EB 3015 EN