Flowserve Noble Alloy Ball Valve IOM - Manual (Page 3)

August 22, 2002, Rev. 2 1
1.0 DISASSEMBLY
Refer to included exploded view drawings for parts identification and location
1.1 Remove the actuator from the retainer (9) if valve is automated. Mount the valve in a vice or
fixture by the flange on the Body (1) if flanged or thread a piece of pipe into the Body (1) of a
threaded end valve and clamp in a vice or suitable fixture. CAUTION: BE SURE THE VALVE
HAS BEEN FULLY DECONTAMINATED BEFORE ATTEMPTING DISASSEMBLY.
If lever operated, remove set screw (22) from the handle (21) and remove handle by lifting
straight off. The handle is not press fit to the stem.
Loosen and remove retainer hex nuts (17) and remove stop collars (19) from retainer (8). Lift
the retainer (8) off the studs (15). Remove the four emergency packing adjusting set screws
(18) from the retainer. The thrust bearing (13) may stay in the retainer or may stay on the
stem. If the thrust bearing remains in the retainer, tap the retainer on the bench to dislodge the
thrust bearing or use a pick to work it out, otherwise lift it off the stem. Remove the shear
collars (23) from the body or retainer depending where they stay when the retainer is removed.
Shear Collars are not used on valves under 1.5" conduit size. Remove the spring cap (12),
packing springs (11), and packing follower (10) from the stem. The packing will be removed
later when the body is apart. For valves with Fugitive Emissions package, refer to the drawings
for the 2 piece ball valve with dual packing and System II
Ô valves in section 4.1, and exploded
view in section 4.5 for the additional parts to be removed. These will be removed after the
retainer (8) is removed.
1.2 The next step is to disassemble the body. (In the case of 3 piece valves, the valve
incorporated 2 tailpieces and a body center section. The only difference would be the addition
of a second body seal and a second set of nuts and studs in the center section. All other repair
instructions remain the same.) Loosen and remove body nuts (16). The Tailpiece (2) can now
be removed. The body seal (7) will usually stay on the tailpiece. Remove the body seal and
discard. BODY SEALS SHOULD NEVER BE REUSED! The seat (4), if it came off with the
tailpiece, can be removed from the seat pocket. A pick may be needed, in case of a soft seat,
to get the seat from the pocket. Be careful not to scratch or damage the seat pocket. Grasp
the ball (3) and pull it out of the cavity (in the case of a 2-piece valve) using a rocking action.
The second seat can then be removed from the body seat cavity. Remove the stem (5) by
pushing it into the body cavity and then removing it from the body cavity. Remove the stem
washer (6) from the stem and discard. STEM WASHERS SHOULD NOT BE RESUSED.
NOTE: Stems on valves with 1/2" and 3/4" balls and some valves with Fugitive Emissions
packages will have a clip style stem collar. To remove this type of stem, push the stem part
way into the body cavity, remove the retainer clip and then pull the stem out the top of the
body.
Remove the packing (9). The valve is now ready for cleaning.