Mounting Screws; Thrust Spool (Model 4000 & 5000) - Emerson Bettis 2000 Series E796 M2CP Installation And Maintenance Manual

Section 3: Assembly to Valves
September 2018
3.
4.
3.2

Mounting Screws

If Bettis supplied adaptation, the mounting screws are included. If adaptation to valve was
the responsibility of others, the mounting screws are not furnished by Bettis. Screws thru
adapter MUST engage a minimum of one screw diameter deep into Bettis actuator base.
1.
2.
CAUTION
Locknut must be tight against stem nut.
3.
3.2.1 Thrust Spool (Model 4000 & 5000)
1.
2.
3.
4.
5.
6.
7.
NOTE:
Reverse procedure if Stem Nut needs to be replaced. Actuator does not need to be
returned to factory for this procedure.
7
Lower actuator over Stem onto valve flange. The screws thru valve flange into
actuator must engage a minimum of one full screw diameter deep into bottom
base and be tightened to a preload. See assembly drawing for screw size and
torque to tighten properly.
Screw Stem Nut on Stem until it enters Drive Sleeve. Line (52) Key and (54) Drive
Sleeve keyway and insert (52) Key.
Turn handwheel in Open direction, pulling Stem Nut into Drive Sleeve until it
bottoms out (valve will begin to open).
Lower Locknut (55) over Valve Stem and screw into place firmly against top of
Stem Nut. Tap Locknut ears using brass drift until tight.
Locate Thrust Mounting bolts.
Remove eight mounting bolts and separate Spool from actuator.
Position Spool over Valve Stem. Thread Spool onto Valve Stem until it meets valve
plate.
Bolt and secure Spool onto valve.
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.
Grease flange face before securing unit to Spool.
Re-install thrust plate mounting bolts. Tighten to proper torque.
Installation and Maintenance Manual
E2K-402-0817 Rev. 3
Assembly to Valves