Warren Controls AmurAct Actuator Linkage and Motor - Manual (Page 14)

14 2600 Emrick Blvd • Bethlehem, PA 18020 • USA • 800-922-0085 • www.warrencontrols.com IOM_AA_RevH_0413
Version B:
two-way AmurAct control valves having
1 1/8” stem travel. 4” Type 20 and 23.
1.
Beginning with a linkage properly oriented, securely
fastened to the valve bonnet and loosely assembled to
the valve stem, manually operate the linkage to raise the
valve stem. Observe that there are TWO benchmarks
scribed into the front face of the crank support column.
2.
gently lower the valve stem and note the position of
the crank relative to benchmark #1 when the plug makes
contact with the valve seat. Exert just enough force on the
crank to take up any looseness in the linkage pivots.
3.
Lower and tighten the two stem nuts together. This
provides a means to grip and rotate the valve stem after
lifting the plug from its’ seat, to thread the stem into or
out of the stem connector. Threading the stem into the
connector shortens the assembly and allows the crank to
move further counterclockwise. Threading the stem out
of the connector lengthens the assembly, allowing less
counterclockwise rotation. Perform this sensitive into or
out of adjustment until the crank stops 2 to 3 degrees
PAST benchmark #1. REPEAT THE POSITION CHECk IN
STEP 2 AFTER EACH ADJUSTMENT.
4.
Carefully loosen the stem nuts from each other and
move the upper nut upward into contact with the stem
connector block. Using a second wrench to keep the
block from rotating, tighten the nut securely against the
block. This tightening will lengthen the stem connection
assembly and allow less crank rotation to the plug/seat
contact point.
5.
Repeat step 2 (above). If the crank stops PRECISELY at
benchmark #1 (denoting proper calibration), tighten the
second stem nut against the first, then repeat step 2 once
more.
6.
If the crank does not stop PRECISELY at the bench-
mark after completing step 5, repeat this procedure from
step 3, appropriately lengthening or shortening the stem
assembly in small increments.
7.
After precise calibration is complete, push the crank
firmly against its support column to fully extend the link-
age input shaft. Install a clamp onto the lower end of the
crank and the crank support column. Draw the crank to-
ward the column until it aligns with the #2 benchmark.
This is the end-of-travel position of the calibrated linkage
and full seating force is now present on the valve plug.
Leave the clamp in place until motor installation is com-
plete.
8.
Calibrate and install the motor as instructed on Page
11 of this manual. The proper motor calibration point for
this version is 90 degrees as indicated on the motor shaft
clamp position scale. Remember to press the motor RE-
SET pushbutton after installation and calibration are com-
plete and the motor is energized, but before the system is
placed into service.
BENcHMARKS cALIBRATED END-OF-TRAVEL
1
2
NOTE that the
valve stem and
plug have been
raised prior
to turning the
stem.
into out of
OVERVIEW: Calibration of the AmurAct linkage is accomplished by adjusting effective stem
length so the linkage crank is precisely aligned with a benchmark when the valve plug contacts
the valve seat. Precision is necessary, because the remaining crank travel determines how much
force will be applied to the valve plug to achieve tight shutoff. Minor maladjustment can result
in major loss of shutoff capability or overstressing of linkage and valve components. AmurAct
performance is directly related to the accuracy of its’ calibration. Calibration of each version is
different from the others, read and understand the entire procedure before adjust-
ing anything. Call our factory with any questions.
wARNING
The valve stem must be raised when making
stem connector adjustments. Do not turn or
rotate the valve stem while the valve plug
is in contact with the valve seat. “Grinding”
contact will damage the mating surfaces,
adversely affect shut-off capability.