Fisher-Rosemount Design CV500, Инструкция по эксплуатации

Страница: 15 / 28

Design CV500
15
VALVE
SIZE
A MAX.
MIN.
L
SIZE
mm Inches mm Inches
3
27.8
27.4 1.094
1.078
165 6.50
4
34.1
33.7 1.344
1.328
165 6.50
6
42.1
41.7 1.656
1.641
197 7.75
8
42.1
41.7 1.656
1.641
229 9.00
10
48.4
48.0 1.905
1.890
229 9.00
12
57.8
57.4 2.275
2.260
260 10.25
Figure 9. Ram Dimension for Bearing Removal
A3308 / IL
15. For 10 and 12-inch sizes, if the bearing (key 6)
on the follower shaft requires replacement and cannot
be removed by hand, press it out using a ram with
dimensions as given in figure 9. Press the bearing into
the valve body cavity.
16. If used, remove the O-rings (keys 19 and 20) from
the bearings. Also, for 3 through 8-inch sizes, remove
the pipe plug (key 29).
Assembly
Note
Before starting to assemble the valve
components, place the valve body (key
1) on a flat surface with the retainer (key
5) facing down as shown in figure 10.
This orientation of the valve allows
easier installation of the V-notch ball.
1. Thoroughly clean the parts before assembly.
2. If O-rings (keys 19 and 20) are used, apply a small
amount of lubricant to the O-rings so the bearings will
easily slide into the valve body. Insert the smaller
O-ring (key 20) inside the bearing and the larger
O-ring (key 19) around the outside of the bearing.
CAUTION
To avoid damage to O-rings resulting
from contact with sharp edges within the
bearing holes, use appropriate care
when installing the O-rings.
3. Slide the bearing for the follower shaft (key 6)
located opposite the packing box and, if used, O-rings
(keys 19 and 20) into the valve body. For 10 and
12-inch sizes, make certain the groove located on the
outside diameter of the bearing is positioned towards
the bottom flange side of the valve body.
4. Slide the bearing located on the packing box side
(key 6 for 3 through 8-inch sizes and key 42 for 10 and
12-inch sizes) into the valve body and against the
bearing stop.
5. For 3 through 8-inch sizes, inspect the drive shaft
(key 3). Insert the shaft end opposite the splined end
into the packing box and through the bearing that was
previously installed in the packing box in step 4. Stop
before the drive shaft enters the main valve body
cavity. Support the splined end of the shaft.
For 10 and 12-inch sizes, inspect the drive shaft (key
3). Insert the splined shaft end with the groove pin hole
into the packing box and through the bearing that was
previously installed in step 4. Stop before the drive
shaft enters the main valve body cavity. Support the
end of the drive shaft that extends out from the valve
body.
6. For 3 and 4-inch sizes, insert the follower shaft
through the outside of the ear of the V-notch ball that
has the smaller diameter (non-stepped) hole. Push the
follower shaft through the ear until the end of the
follower shaft with the groove pin hole is between the
ears and the other end of the follower shaft is flush
with outside edge of the ear. Place the ball in the valve
body cavity with the ear containing the follower shaft
adjacent to the follower shaft bore. Slide the follower
shaft through the ear of the ball and into the bearing
(key 6) which was previously installed in step 3.
For 6 and 8-inch sizes, locate the smaller diameter
hole in the V-notch ball ear. Place the ball in the valve
body cavity with the ear containing the smaller
diameter hole adjacent to the follower shaft bore.
Place the follower shaft between the ears of the
ball. Slide the follower shaft through the ear of ball
and into the bearing (key 6) that was previously
installed in step 3.
For 10 and 12-inch sizes, place the ball in the valve
body cavity. Slide the follower shaft, splined end first,
through the bearing (key 6), that was previously
installed in step 3, and into the ear of the ball. Align the
groove pin hole in the follower shaft with hole in the
ball ear.