Into out of – Warren Controls AmurAct Actuator Linkage and Motor User Manual

Page 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.

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.

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.

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.

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.

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.

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.

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.

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

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.