Changing Cam Position; Pressure Connections; Supply Connection - Emerson Fisher 3582i Instruction Manual

3582, 582i, and 3583
January 2013

Changing Cam Position

Refer to figure 21 for a typical cam illustration and key number locations.
Note
D
For Valve Positioners: The small arrow on the cam must point in the direction of stem movement with increasing actuator
diaphragm pressure.
D
For Valve Stem Position Transmitters: If the arrow on the cam points up toward the nozzle, output pressure increases with
downward stem movement. If the arrow points down, output pressure decreases with downward stem movement.
If the arrow is pointing in the wrong direction, use the following procedure to remove, reverse, and re‐install the cam.
When mounting a valve positioner or valve stem position transmitter, check to see if the correct cam (key 4) and cam
position has been selected. To change the cam or cam position, unhook the extension spring (key 38), and remove the
cam bolt and locking nut (keys 6 and 45). Remove the cam and spring retainer bracket (key 43).
To install the cam, screw the locking nut all the way onto the cam bolt. Attach the cam and spring retainer bracket to
the shaft assembly with the cam bolt. Tighten the bolt to secure the cam. Then, tighten the locking nut against the
spring retainer bracket. Hook the spring into the spring retainer bracket.
Details on cam characteristics can be found on page 24 in the cam information portion of the operating information
section.

Pressure Connections

WARNING
Valve positioners and valve stem position transmitters are capable of providing full supply pressure to connected
equipment. To avoid personal injury or equipment damage caused by parts bursting from system overpressure, make sure
the supply pressure never exceeds the maximum safe working pressure of any connected equipment.
Pressure connections are shown in figure 7. All pressure connections are 1/4 NPT internal. Use 3/8‐inch tubing for all
pressure connections. After making pressure connections, turn on the supply pressure and check all connections for
leaks.

Supply Connection

WARNING
Personal injury or property damage may occur from an uncontrolled process if the supply medium is not clean, dry, oil‐free
air, and noncorrosive gas. While use and regular maintenance of a filter that removes particles larger than 40 micrometers
in diameter will suffice in most applications, check with an Emerson Process Management field office and industry
instrument air quality standards for use with corrosive air or if you are unsure about the proper amount or method of air
filtration or filter maintenance.
3582i does not meet third party approvals for use with natural gas as the supply medium. Use of natural gas as the supply
medium can result in personal injury or property damage from fire or explosion.
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Instruction Manual
D200138X012