Changing The Range Spring; Replacing Gaskets - Emerson Fisher 3582 Instruction Manual

Instruction Manual
June 2010
that must be taken to protect against
process media.
WARNING
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,
WARNING
For explosion proof applications,
disconnect power before removing the
converter housing cap in an explosive
atmosphere.
WARNING
When replacing components, use only
components specified by Emerson
Process Management. Substitution
with other components may result in
the positioner or transmitter no longer
meeting safety certification
requirements and personal injury or
property damage.
Always use proper component
replacement techniques. Improper
techniques and poor quality repairs
can impair the safety features of the
device.
In case of operational difficulties, the valve positioner
or valve stem position transmitter should first be
checked to see that adjustments have been properly
made. All pressure lines and connections should be
checked for leaks.
The pneumatic relay and gaskets should also be
inspected and replaced if necessary.
Instructions are given below for:
D changing the range spring;
D replacing gaskets, nozzle O-rings, and relay;
D adjusting the flapper pivot;
D replacing the 582i converter primary O-ring and
filter;
3582, 582i, and 3583
D replacing the 582i converter cover O-ring;
D removing the 582i converter; and
D reassembling the 582i converter.

Changing the Range Spring

Unless otherwise noted, key number locations are
shown in figure 20.
The range spring is inside the bellows assembly.
Standard range spring data is given in table 11.
When an input signal range is split to operate two or
more control valves, normally changing the range
spring is not necessary. The input signal range for
the range spring is stamped on the nameplate.
Perform the following procedure to change the range
spring in a valve positioner or valve stem position
transmitter.
1. Unhook the extension springs (keys 27, 77) from
the beam (key 29).
2. Loosen and remove the two screws (key 13), and
lock washers (key 12) that hold the bellows
assembly (key 7) in place.
3. Lift out the beam and bellows assembly. Be
careful not to lose the small O-ring (key 11).
4. Loosen the machine screw (key 10), and remove
the range spring (key 8).
5. Install a new range spring, making sure the small
end of the spring is against the spring seat (key 9).
Replace the spring seat and tighten the screw.
6. If the O-ring (key 11) is worn or damaged,
replace it with a new one after applying lubricant
(key 94). Make sure the O-ring is in place, then
install the bellows assembly, securing it with two
mounting screws and lock washers.
7. Install the beam over the pivots and hook the
springs to the beam.
8. Make any minor adjustments that may be
necessary to re-level the beam as outlined in the
beam alignment procedures of the valve positioners
or the valve stem position transmitters calibration
section. After leveling the beam, calibrate the unit
according to the appropriate calibration instructions.

Replacing Gaskets

Unless otherwise noted, key numbers used in this
procedure are shown in figures 24 and 25.
A gasket (key 34C) is located behind the bypass
handle (key 34D) of 3582 valve positioners or the
29