Mar 2013
Installation and Maintenance
Part Number: E2K-402-0313, Rev. A
6
Section 3: Assembly To Valves
Assembly To Valves
CAUTION:
LOCKNUT MUST BE TIGHT AGAINST STEM NUT.
3) Lower Locknut (55) over Valve Stem and screw into place rmly
against top of Stem Nut. Tap Locknut ears using brass drift until
tight.
3.1.2 THRUST SPOOL (Model 4000 & 5000)
1) Locate Thrust Mounting bolts.
2) Remove eight mounting bolts and separate Spool from actuator.
3) Position Spool over Valve Stem. Thread Spool onto Valve Stem
until it meets valve plate.
4) Bolt and secure Spool onto valve.
5) Position actuator above Spool. Lower actuator onto Spool while
manually rotating the unit until ears on Stem Nut and ears on
main Drive Sleeve mesh.
6) Grease ange face before securing unit to Spool.
7) Re-install thrust plate mounting bolts. Tighten to proper torque.
NOTE:
Reverse procedure if Stem Nut needs to be replaced. Actuator does not
need to be returned to factory for this procedure.
3.1.3 SPLINE BUSHING (QUARTER TURN)
BETTIS removable Spline Bushing allows easy adaption to valve shaft diameter and
Key. Actuator may be rotated with respect to the valve shaft for unexpected or
awkward eld installations.
1) Move valve to full Open or Close.
2) Place Spline Bushing on valve shaft with Key and tighten set screw.
3) Using the handwheel on actuator, move the Gear Position Indicator
Arrow (21) to full Open or Close (duplicating the position in Step 1).
4) Position actuator so the spline bore is correctly aligned with the Spline
Bushing on stem shaft.
5) Move the actuator onto the shaft until the ange faces properly mate.
Secure with screws thru the adapter ange into the base of the actuator.
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