Section 2: Assembly To Valves; Threaded Valve Stem - Emerson EIM 2000 Series Installation And Maintenance Manual

Section 2: Assembly to Valves

August 2017
Section 2: Assembly to Valves
2.1

Threaded Valve Stem

Figure 2
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CAUTION:
Locknut must be tight against stem nut.
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4
Stem Nut Installation (Multi-Turn)
Unscrew Locknut (55) holding Bronze Stem Nut (54) and remove Stem Nut and
Key (52).
Lubricate Stem and run Stem Nut down Stem to check acme thread fit, then
remove Stem Nut and set aside.
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 Valve Stem until it enters Drive Sleeve. Line Nut Key with Drive
Sleeve keyway and insert Stem Nut Key (52).
Turn handwheel in Open direction, pulling the 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.
Installation and Maintenance Manual
E2K-401-0817 Rev. 1
Assembly to Valves