Design CAV4
6
Table 5. Recommended Torque for Packing Flange Nuts
STEM DIAMETER
MINIMUM
MAXIMUM
mm
Inch
N
m
Lbf
ft
N
m
Lbf
ft
19.1
3/4
41
30
61
45
25.4
1
61
45
91
67
31.8
1-1/4
81
60
122
90
38.1
1-1/2
61
45
91
67
69.9
2-3/4
81
60
122
90
Figure 4. Optional Lubricator and Lubricator/Isolating Valve
10A9421-A
AJ5428-D
A2160-2/IL
cept the isolating valve must first be opened and then
closed after lubrication is completed.
Packing Maintenance
For spring-loaded single PTFE V-ring packing (figure
5), the spring (key 23) maintains a sealing force on the
packing. If leakage is noted around the packing follower
(key 22), check to be sure the shoulder on the packing
follower is touching the bonnet. If the shoulder is not
touching the bonnet, tighten the packing flange nuts
(key 15) until the shoulder is against the bonnet. If leak-
age cannot be stopped in this manner, replace the
packing as described in the
Packing Replacement pro-
cedure.
For PTFE-composition or graphite ribbon/filament
packing (figure 5), leakage around the packing follower
may be stopped by tightening the packing flange nuts
(key 15). If leakage cannot be stopped by tightening
the nuts, replace packing as described in the
Packing
Replacement procedure.
Figure 5. Packing Arrangements
12A7837-A
B1422-1*/IL
12A8173-A
A2596-1/IL
14A7924-A
A2928-1/IL
19.1 mm (3/4-INCH)
25.4 mm (1-INCH) OR
31.8 mm (1-1/4-INCH) STEM
GRAPHITE PACKING FOR 31.8, 38.1, & 69.9 mm
(1-1/4, 1-1/2, & 2-3/4 INCH) STEM DIA
0.102mm (0.004 INCH)