Warren Controls AmurAct Actuator Linkage and Motor - Manual (Page 13)

13
AmurAct IOM_AA_RevH_0413
Version A:
two-way AmurAct control valves having ¾”
stem travel (all two-way valves except the 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 the benchmark 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 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.
5.
Repeat step 2. 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 as-
sembly 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 small c-clamp onto the crank and
link and draw the two together into alignment with each
other. 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 INSTA-
LATION IS COMPLETE.
8.
Calibrate and install the motor as in-
structed on Page 11 of this manual. The prop-
er motor calibration point for this version is
90 degrees as indicated on the motor shaft
clamp position scale. Remember to press the
motor RESET pushbutton after installation
and calibration are complete and the motor
is energized, but before the system is placed
into service.
CALIBRATING ThE
AMURACT LINkAGE
BENcHMARK cALIBRATED END-OF-TRAVEL
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.
NOTE that the valve stem and plug have
been raised prior to turning the stem.
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.
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 pro-
cedure before adjusting anything. Call our factory with any questions.
4.
Carefully loosen the stem nuts
from each other and move the up-
per nut upward into contact with the
stem connector block. Using a second
wrench to keep the block from rotat-
ing, tighten the nut securely against
the block. This tightening will length-
en the stem connection assembly and
allow less crank rotation to the plug/
seat contact point.