Samson 3767 - Page 16

3-2 EB 8355-2 EN
Design and principle of operation
ing to the input signal issued by the control
equipment.
Positioner with position transmitter
A positioner containing a position transmit-
ter cannot be equipped with integrated limit
switches or an integrated solenoid valve
since the position transmitter requires most of
the space inside.
The position transmitter is used to assign the
valve position, i.e. the valve travel, to an out-
putsignalof4to20mA.
The tuning of the position transmitter ensures
that both end positions "valve CLOSED" or
"valve OPEN" as well as all intermediate po-
sitionscanbesignalized.Sincethevalvepo-
sitionissignalizedindependentlyofthein-
put signal to the positioner, the position
transmitter is a suitable option for checking
the actual valve position.
Legend for Fig.3-1
1 Lever
1.1 Pin
1.2 Clamp
2.1 Nozzle>>
2.2 Nozzle<>
3 Diaphragm lever
4 Range spring
5 Measuring diaphragm
6.1 Span adjuster
6.2 Zero adjuster
7 Turnboard
8 Xp restriction
9 Pressure regulator
10 Booster
11 Volumerestriction
12 Solenoid valve (option)
13 i/pconverter