Flowserve MX Accutronix - Manual (Page 11)

11 Accutronix MX Quick Mounting Instructions • LMENIM2312
Flow Control
Limitorque Actuation Systems
3. Machine the stem nut to suit the valve stem. Ensure sufficient
clearance to avoid unnecessary wear and heating during operation.
Reassembly – Unit MX-140
Refer to the figure on page 10.
1. Clean the stem nut, washers, and bearing(s) thoroughly.
2. Slide second set of thrust washers and bearing in place if removed.
3. Install stem nut.
4. Install first set of thrust washers and bearing.
NOTE: Order of assembly for thrust washers and bearing must be as
follows: washer, thrust bearing, washer.
Pilot installation
Slide pilot into thrust base assembly and secure with the two washers
and screws. Tighten fully.
Type “BL” Drive: Splined-drive Applications
(Not applicable for MX-85 or -140)
Steel alloy splined nuts are provided to a standard involute spline
category for rising and rotating stem valves per customer requirements.
Disassembly and reassembly is the same as the B4 base and the torque
nut. See Type “B” Bases: Torque-only Applications section.
Mechanical Installation of MX
Actuator onto Valve or Gearbox
NOTE: Refer to LMAIM2314, MX Maintenance and Spare Parts for
more detailed instructions.
Before installing the actuator onto a valve or gearbox, check the
following to ease installation:
• Verify mounting flange is suited dimensionally to mate with the
actuator base. Ensure that it is perpendicular to the valve stem or
gearbox input shaft.
• Ensure the stem nut mates with the valve stem or input shaft. For
screwed nuts, it is advisable to run the stem nut down the entire length
of the stem to check for tightness. Keyed or splined shafts should
exhibit a smooth, sliding fit with the key installed.