Cryogenic Valves
6
C47C, FC47C, FC47W
8.3.
ASSEMBLY
The following instructions are for off-line assembly of valves
sizes 1 ⁄ 2” to 2-1 ⁄ 2” (or 2” full bore).
8.3.1.
Clean valve parts completely using a cloth and IPA solution.
8.3.2.
Lubricate the new stem thrust seal, bearing and packing,
with appropriate lubricant (Cassida grease EPS 2 or
equivalent - thin smear).
8.3.3.
Place the stem thrust ring on the stem.
8.3.4.
Slide the stem into the extended bonnet with the threaded
side first and carefully guide it up through the bonnet bore.
8.3.5.
Holding the stem up insert the new stem seal over the stem
and into the stem bore. Place the new anti-abrasion ring,
metal follower and the two disks spring (face to face) onto
the stem.
8.3.6.
Thread the gland nut onto the stem. Tighten the gland nut to
the torque figures (table 1).
8.3.7.
Place the locking clip on the gland nut by adjusting the
orientation of the nut (in the clockwise direction).
8.3.8.
Insert the seal inside the extended bonnet bottom flange.
8.3.9.
Insert the stem bearing into the valve body top platform.
8.3.10.
Follow the welded arrow and place the ball inside the body
with the pressure relief hole towards the arrow's tail.
8.3.11.
Holding the extended bonnet, slide the stem into the
ball.
Note:
the unique design will allow only one correct
engagement. (See figure 5)
8.3.12.
With the bottom flange of the bonnet aligned with the valve
platform, and with the arrows on the body and bonnet
pointing in the same direction, hand tighten the bonnet bolts
and spring washers.
8.3.13.
Tighten the bonnet bolts to the torque figures (table 3).
8.3.14.
Place the handle, serrated washer and thread the wrench
nut on the stem. Holding the handle tighten the wrench nut
tight.
8.3.15.
Place the new seats, seat seals and body seals in the valve
body.
8.3.16.
Tighten the body bolts to the torque figures (table2), and
according to tightening pattern illustrated in figure 6.
TABLE 1
Gland Nut Tightening Torque For C47C, FC47C and
FC47W
C47C
FC47C, FC47W
Valve size
Stem thread Nm
Lb-In Nm
Lb-In
½”- ¾”
3
⁄
8
” - 24 UNF
4
35
6
53
1”- 1¼”
7
⁄
16
” - 20 UNF
9
80
11
97
1½”- 2”+2½"*
9
⁄
16
” - 18 UNF
13
115
15
133
2½”
M20 x 2.5
30
265
30
265
3” - 4”
1” - 14 UNS
60
530
60
530
6” - 8”
1½” - 12 UNF
120
1060
120
1060
*
For Valve size 2 1/2" with stem 1 1/2"
8.2.19.
Loosen the 4 cap screws and remove the extended bonnet
from the valve body.
8.2.20.
Support the ball to prevent it from falling out of body. Set the
ball aside in a clean secure area for reuse
8.2.21.
Remove and discard the bonnet seal and the stem bearing.
8.2.22.
Remove the wrench bolt, wrench head and handle, stem
nut, stop plate, follower, bearing, anti-abrasion ring and
stem seal. Place all components removed, in a clean
secure area.
Bare shaft valve
Remove stem nut, two disc springs, location ring , tab lock
washer, follower, bearing, anti-abrasion ring and stem seal.
Place all components removed, in a clean secure area
.
8.2.23.
Slide the stem and remove it from the extended bonnet.
8.2.24.
Discard the stem thrust seal taking care not to scratch or
nick the stem or packing bore area of the bonnet.
8.2.22.1.
8.3.17.
Leave the valve in the open position for flushing the line.
The following instructions are for off-line
assembly of valves sizes 2-1/2” to 6”.
8.3.18.
Clean valve parts completely using a cloth and IPA solution.
8.3.19.
Lubricate the new stem thrust seal, bearing and packing,
with appropriate lubricant (Cassida grease EPS 2 or
equivalent - thin smear).
Warning:
Stem thrust ring must be placed in the correct
orientation (See figure 7).
8.3.20.
Place the stem thrust ring on the stem.
8.3.21.
Slide the stem into the extended bonnet with the threaded
side first and carefully guide it up through the bonnet bore
8.3.22.
Holding the stem up insert the new stem seal over the stem
and into the stem bore. Place the new anti-abrasion ring,
metal follower, locking clip and the stop plate onto the stem.
Bare shaft valve
8.3.22.1.
Holding the stem up insert the new stem seal over the
stem and into the stem bore. Place the new anti-abrasion
ring, follower, two disc springs, ,location ring and, tab lock
washer onto the stem.
8.3.23.
Thread the gland nut onto the stem. Tighten the gland nut to
the torque figures (table 1).
8.3.23.
Insert the seal inside the extended bonnet bottom flange..
8.3.24.
Insert the stem bearing into the valve body top platform.
8.3.25.
Follow the welded arrow and place the ball inside the body
with the pressure relief hole towards the arrow's tail.
8.3.26.
Holding the extended bonnet, slide the stem into the
ball.
Note
: the unique design will allow only one correct
engagement. (See figure 5).
8.3.27.
With the bottom flange of the bonnet aligned with the valve
