Table of Contents
Advertisement
3582, 582i, and 3583
3. Remove the two screws (key 105 in figures 24
or 25) holding the bypass block (key 34A in figures
24 or 25) to the valve positioner case and remove
the bypass block. Save the screws to reattach the
582i converter.
4. Remove and discard the existing gasket (key 104
in figures 24 or 25) between the bypass block and
valve positioner case.
5. Unpack the 582i converter to be installed.
6. Position the new gasket on the 582i converter as
shown in figure 26. Insert the existing screws (key
105 in figures 24 or 25) through the appropriate
holes in the 582i converter housing and new gasket.
7. Mate the converter and new gasket to the side of
the valve positioner case using the alignment pins
on the converter housing.
8. Tighten the screws.
9. Reconnect the pressure connections according to
the instructions given in the pressure connections
section of this manual.
10. Make the electrical connections according to the
instructions given in the electrical connections
section of this manual.
11. Complete the standard calibration procedure
described in the calibration section of this manual.
12. Return the control valve package to service.
Operating Information
Instructions for setting the zero and span are found
in the calibration section.
Valve Positioner Cam Information
The small arrow on the valve
positioner cam must point in the
direction of stem movement with
increasing actuator diaphragm
pressure. If the arrow is pointing in the
wrong direction, remove, reverse, and
re-install the cam. Refer to the
Changing Cam Position section of this
manual.
Refer to figure 20 for key number locations. Unhook
the spring (key 38), and remove the cam bolt and
locking nut (keys 6 and 45). Remove the cam (key 4)
and spring retainer bracket (key 43). To install the
20
Note
CAM
PERCENT VALVE STEM TRAVEL
0 PERCENT CORRESPONDS TO
MINIMUM DIAPHRAGM PRESSURE
CK4832-A / DOC
Figure 12. Cam Characteristic Curves
cam, screw the locking nut all the way onto the cam
bolt. Attach the cam and spring retainer bracket 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.
When shipped from the factory, 3582 valve
positioners and the 3582i valve positioner have a
linear cam, Cam A, installed in the operating
position. Two characterized cams, Cams B and C,
are available. These characterized cams may be
used to modify the valve flow characteristics.
Figure 12 shows resultant stem travel due to an
incremental instrument pressure change for each
cam. In figure 12, the curves are based on 60
degrees cam rotation for 100 percent stem travel. At
50 percent of the input signal span, for example, the
stem will travel 50 percent with cam A, 68 percent
with cam B, and 32 percent with cam C. Figure 13
shows how the flow characteristics change when
using the cams with a valve that has equal
percentage characteristics. Figure 14 shows how the
flow characteristics change when using the cams
with a valve that has linear characteristics.
Instruction Manual
June 2010
C
CAM
A
CAM
B
Hide quick links:
Advertisement
Table of Contents
