Samson 2469 - Set Point Adjustment; Flow Rate; Temperature; 4 Maintenance - Replacing Parts

3.2 Set point adjustment
3.2.1 Flow rate
Proceed as follows to set or change the flow
rate set point:
Unscrew the cap (14).
Loosen the lock nut (13) and turn the set point
screw:
4
Turn the screw clockwise (P)toreduce
the flow rate.
4
Turn the screw counterclockwise (Q)to
increase the flow rate.
The diagram serves as a guide for flow rate
adjustment. The required number of turns of
the set point screw is based on a closed re-
striction (1.2).
Refer to the regulator's nameplate for the ad-
justable set point range. In DN 15, several
ranges are possible due to the different flow
coefficients (see table).
When the desired flow rate value has been
reached, tighten the lock nut and screw the
cap back on.
In the special version with scaled cap, the set
point can be adjusted directly (one scale
marking equals one turn of the set point
screw).
3.2.2 Temperature
Adjust the set point on the black plastic ring
(set point adjuster 22; continuously adjust
-
able) observing the reference thermometer.
4
Turn the adjuster clockwise to reduce (P)
the temperature.
4
Turn the adjuster counterclockwise (Q)to
increase the temperature.
The adjusted temperature set point can be
lead-sealed through the bore in the set point
adjuster.
4 Maintenance – Replacing
parts
The regulator is maintenance free. Neverthe
-
less, it is subject to natural wear, particularly
at the seat, plug and operating diaphragm.
Depending on the operating conditions, the
regulator needs to be checked at regular in
-
tervals to detect and remove possible mal
-
functions.
If the regulator's tight shut-off is impaired,
there may be either dirt or natural wear on
the seat and plug.
If the flow rate deviates considerably from the
adjusted set point, leak-test the operating dia-
phragm and replace it, if necessary.
CAUTION!
For installation and maintenance
work on the regulator, make sure the
relevant plant section has been
depressurized and, depending on
the process medium, drained as
well.
For high medium temperatures, al
-
low the plant section to cool down to
ambient temperature before starting
any work.
We recommend to remove the regu
-
lator from the pipeline.
8 EB 3132-2 EN
Maintenance – Replacing parts