Assembly - Emerson Fisher V260 Instruction Manual

V260 Valve
WARNING
In the next step, be sure to secure the
bearing plates on the ball to prevent
them from falling. When lifting the ball,
the bearing plates may slide-off the
ball trunnions which may cause
personal injury or property damage.
11. Turn the ball (key 11) to the closed position. Use
a nylon sling through the ball bore to lift the ball out
of the valve body. Lift the ball and set it on a clean
soft surface.
12. Remove the two bearing plates and thrust
washers (key 4 and 30) from the ball (key 11).
Inspect the bearing in the bearing plates and thrust
washers (keys 29 and 30). If necessary, remove and
replace the bearings (key 29).
13. Evenly loosen the hex nuts from the studs on
the lower tailpiece (key 2 or 6). Remove the valve
body from the tailpiece.
14. Remove from the tailpiece assembly, the dome
assembly and/or the seal assembly, wave spring,
and O-ring seal. Clean and protect all sealing
surfaces.

Assembly

Be sure to replace valve parts in the same position
that they were removed. Use the following
suggested sequence to reassemble the valve.
Clean and protect all sealing surfaces
from damage while installing parts.
Lubricate parts when necessary as an
aid for installing parts, and to help
protect sealing surfaces.
Key number locations are shown in figure 6.
1. Place the tailpiece (key 2 or 6), pipe flange end
down on a clean soft surface with the seal assembly
or attenuator dome cavity facing up.
2. Lubricate and install the O-rings (key 12) on both
tailpieces.
For characterized domes, install the grooved end of
the dome groove pin (key 33) into the tailpiece, as
far as it will go. Use only a light tapping force, taking
care not to bend the pin. This groove pin will prevent
8
Note
the attenuator dome from rotating with respect to the
tailpiece.
3. Install the inlet end attenuator dome (key 28
or 10) into the tailpiece (key 6). Use the lifting lugs in
the two threaded holes for ease of handling.
For characterized attenuators, align the pin hole in
the dome with the groove pin (key 33) placed in the
tailpiece in step 3. High Density attenuators don't
require this orientation.
For dual seal V260A or V260B constructions,
lubricate and install the O-ring (key 15) on the dome
spacer (key 13). If a dual dome is being assembled,
install the dome spacer into the tailpiece, using the
two threaded holes as lifting lugs.
4. Apply thread locking adhesive to and install the
two cap screws (key 36) that hold the washers
(key 37) which help retain the dome or dome spacer
(if applicable) in the tailpiece.
For constructions with dual dome and/or dual seals,
lubricate and install the O-ring (key 7) in the groove
on the inlet seal (key 9). Install the wave spring
(key 8) over the end of the seal. Install the seal
assembly O-ring (key 7) between the dome spacer
and the dome (key 10).
D Verify that the ball opens into the
dome windows last. (See figure 5)
D If not, remove the dome and
tailpiece and turn it 180 degrees to
allow the windows to open last.
5. Install the grooved end of the groove pins (key 5)
into the bearing plates (key 4) as far as they will go.
Use only a light tapping force, taking care not to
bend the pins.
6. Apply dry film lubrication between the trunnion
surfaces on the ball and the trunnion bearings.
7. Install new bearings (key 29) in the bearing plates
(key 4).
WARNING
In the next step, be sure to secure the
bearing plates on the ball to prevent
them from falling. When lifting the ball,
the bearing plates may slide off the
ball trunnions which may cause
personal injury or property damage.
Instruction Manual
May 2010
Note