Warren Controls AmurAct Actuator Linkage and Motor - Manual (Page 15)

15
AmurAct IOM_AA_RevH_0413
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 the benchmark scribed into the front
face of the crank support column.
BENcHMARK cALIBRATED
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
the benchmark (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 benchmark
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 linkage
input shaft.
8.
Calibrate and install the motor as instructed on Page 11
of this manual. The proper motor calibration point for this
version is approximately 85
degrees as indicated on the
motor clamp position scale.
The remaining motor travel
exerts valve close-off force.
Remember to press the mo-
tor RESET pushbutton after
installation and calibration
are complete and the motor
is energized, but before the
system is placed into ser-
vice. (Verify Dip Switch #5
is set to off)
NOTE that the valve stem and plug have been raised prior to turning the
stem.
into out of
2.
gently lower the valve stem and note the position of
the crank relative to the benchmark 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 the benchmark. REPEAT THE POSITION CHECk IN
STEP 2 AFTER EACH ADJUSTMENT.
Version C: three-way AmurAct control valves having 3/4” stem travel. Small (1/2”-1”)
AMB-30 valves have stem travel = 9/16”.
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.