Vent Piping
CVHH-SVX001A-EN
37
Table 9.
“C” values used to determine rupture disk vent
line sizes (lb/ min); for use w ith
Figure 24, p. 38
N TON
Ev a p.
Siz e
( EV SZ)
Con d.
Siz e
( CD SZ)
“C” V a lu e s f or U n it Com pon e n t s
Tot a l
“ C”
V a lu e Ev a p. Con d. Econ .
Oil
Ta n k
900–1200
100M
100M
112.0
48.4
40.7
18.5
4.5
900–1200
100L
100L
123.2
54.5
45.8
18.5
4.5
900–1200
130M
130M
122.4
54.0
45.4
18.5
4.5
900–1200
160M
200M
134.1
60.5
50.7
18.5
4.5
900–1200
200L
220L
160.4
75.4
62.1
18.5
4.5
900–1200
220L
220L
168.6
83.6
62.1
18.5
4.5
1500- 1700
200L
200L
156.8
75.4
57.1
19.8
4.5
1500- 1700
220L
220L
169.9
83.6
62.1
19.8
4.5
900–1200
100M
10HM
127.0
48.4
55.7
18.5
4.5
900–1200
130M
13HM
138.2
54.0
61.3
18.5
4.5
900–1200
160M
20HM
150.2
60.5
66.8
18.5
4.5
1500- 1700
200L
20HL
174.9
75.4
75.2
19.8
4.5
1500- 1700
220L
22HL
191.4
83.6
83.6
19.8
4.5
Notes:
1 . Rupt ur e disk diam et er is 3 in. ( 76.2 m m ) .
2 . Use t he t ot al “ C” value in
Figur e 24, p. 38
t o det erm ine t he vent line
pipe diam et er.
3 . I f piping m ult iple rupt ur e disks ( m ult iple unit s) t o a com m on vent
line, fir st det er m ine t he t ot al “ C” value for each unit , and t hen; add
all “ C” values t oget her and apply t he r esult t o
Figur e 24, p. 38
.
4 . The CVHH unit is a Sim plex chiller and has ( 1) r efr igerant cir cuit and
( 1) r elief dev ice.
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