Adjusting The Differential Pressure Set Point Of The Type 2427 Actuator (Type 42-37); Adjusting The Pressure Set Point Of The Type 2429 Actuator (Type 42-39) - Samson 42-37 Mounting And Operating Instructions

Operation
7.3 Adjusting the differential
pressure set point of the
Type 2427 Actuator
(Type 42-37)
Î Before adjusting the differential pressure,
close the shut-off valve on the consumer
side or the bypass to reduce the maxi-
mum flow rate to approx. 5 %.
If you are using a motorized valve, close
it to approx. 10 % of its travel.
Î Set the differential pressure set point by
turning the set point adjuster (17) for dif-
ferential pressure counterclockwise ().
To do this, compare the pressures up-
stream and downstream of the consumer
at the reading of the installed pressure
gauges. If small differential pressure set
points are to be adjusted, we recom-
mend using a differential pressure gauge
instead of the two pressure gauges.
Turn the set point adjuster (17) clockwise ()
to increase the differential pressure set point
and counterclockwise () to reduce the dif-
ferential pressure set point.
7-6
7.4 Adjusting the pressure set
point of the Type 2429
Actuator (Type 42-39)
Adjust the pressure set point at the set point
adjuster (22) for pressure. While doing so,
observe the downstream pressure at the in-
stalled pressure gauge.
Turn the set point adjuster (22) clockwise ()
to increase the pressure set point and coun-
terclockwise () to reduce the pressure set
point.
EB 3017 EN