DeZURIK
November 2020
Page 29
D10322
Valve Reassembly
(Continued)
6. Replace the packing, the packing gland and the gland adjustment nuts as shown in steps 7 and
8 of the
Replacing Packing
section on page 7.
7. On Class 150 valve sizes 2
–18" (50–450mm) and Class 300 valve sizes 2–16" (50–400mm),
replace and tighten the pipe plug (A9) in the bottom of the body.
Note:
With metal seat option, seal the threads of the pipe plug with Sepco SG630805AN-25
UCAR Graphoil Tape; with other seats, use PTFE tape. Wind the tape three turns
counterclockwise, as viewed from the threaded end and spiral the tape approximately one
thread for each turn.
8. On larger sizes:
a. Mount the cover (A31) and seal (A30) to the bottom of the body with the cover screws
(A33).
b. Lubricate the threads of the screw with a rust inhibitor such as Never Seez.
c. Tighten the screws as follows: 1/2-13 screws to 38±5 ft lbs. (52±6 Nm), 5/8-11 screws to
77±10 ft lbs. (104±14 Nm) and 3/4-10 screws to 140±18 ft lbs. (190±24 Nm).
9. Mount the actuator bracket on the
valve and tighten the screws as
shown in Table A (page 17).
10. Re-mount the actuator on the
valve (see actuator instructions).
11. Actuate the valve. If necessary,
adjust the actuator position stops.
12. Install the valve in the pipeline as
described in the
Installing Valve
section.
13. If the actuator is a powered
actuator, reconnect the power to
the actuator.
14. Pressurize the valve.
15. If packing leaks, tighten the gland
nuts evenly and slowly
– just
enough to stop the leak.
Table F: Disc Pin Torques
Fastener Type
Fastener
Size
Torque
ft lbs.
Nm
2
–12”
(50-300mm)
Disc Pin
Set Screw
(A24)
1/4-20
3 ± 0.5
4 ± 1
5/16-18
7 ± 1
10 ± 1
3/8-16
13 ± 2
18 ± 2
1/2-13
30 ± 4
40 ± 5
5/8-11
63 ± 8
85 ± 10
14
–54”
(350-1350mm)
Disc Pin (A5)
3/4-10
115 ± 15
160 ± 20
7/8-9
180 ± 23
245 ± 30
1-8
270 ± 35
370 ± 50
1 1/8-7
380 ± 50
520 ± 70
1 1/4-7
540 ± 70
730 ± 95
1 3/4-5
1600 ± 200
2200 ± 300
2-8
2100 ± 300
2900 ± 400
2 1/4-8
3000 ± 400
4100 ± 550