Samson 3374 - Design and Principle of Operation

EB 3018 EN 3-1
Design and principle of operation
3 Design and principle of oper-
ation
Î See Fig.3-1 and Fig.3-2
The device combinations for the Type42-
36E consist of the Type42-36 Pressure-in-
dependent Control Valve (PICV) and a
Type5827 or Type3374 Electric Actuator
(depending on the valve size).
The regulator closes when the ow rate or
the output signal of the electric controller in-
creases.
Version
Type42-36E: DN15 to 250, consisting of a
Type2426 Diaphragm Actuator and a
Type2423E Valve (balanced by a bellows
or diaphragm) with restriction to adjust the
ow rate set point. The regulator is installed
in the ow or return ow pipe.
The valves are tted with an adapter for con-
nection of an electric actuator. It serves to
apply the control signal (mostly a tempera-
ture signal) of an electric control device. The
electric actuator adjusts the restriction and
thus the ow set point.