3582I Valve Positioner - Emerson Fisher 3582i Instruction Manual

Instruction Manual
D200138X012
Figure 17. Schematic Illustration of Fisher 3582 Positioner
ROTARY SHAFT ARM
TRAVEL PIN
22A7965‐A
A2453‐2

3582i Valve Positioner

As shown in figure 18, the 3582i electro‐pneumatic valve positioner has a 582i electro‐pneumatic converter attached
to the valve positioner. The 582i contains an I/P module which provides a pneumatic output proportional to a DC
current input signal. The DC current input operates coils in a force balanced beam system which in turn, control bleed
air through an integral nozzle/flapper arrangement. The nozzle pressure provides the pneumatic input signal pressure
used by the pneumatic valve positioner.
Figure 18. Schematic Illustration of Fisher 3582i Positioner
4‐20 MILLIAMPERE—
INPUT SIGNAL )
582i
CONVERTER
SUPPLY
OUTPUT TO ACTUATOR
RELAY
ROTARY
SHAFT ARM
FLAPPER ASSEMBLY
A4818‐2
SUPPLY
BEAM
PIVOT
REVERSE ACTING
QUADRANT
OUTPUT TO
ACTUATOR
RELAY
INSTRUMENT INPUT
BELLOWS
FEEDBACK AXIS
PIVOT
NOZZLE
FLAPPER ASSEMBLY
DIRECT ACTING
QUADRANT
INPUT AXIS
CAM
REVERSE ACTING
QUADRANT
PNEUMATIC SIGNAL FROM CONVERTER
BELLOWS
FEEDBACK AXIS
NOZZLE
BEAM
DIRECT ACTING
QUADRANT
INPUT AXIS
CAM
3582, 582i, and 3583
January 2013
33