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Table-10 Estimated Effective Cv when Using Pipe Reducers with 3-Way Ball Valve Assemblies.
Valve Size
(in.)
P Code
C
v
(A Port)
Estimated Effective C
v
(k
vs
)
Pipe Size
- inches (NPT)
11
-1/4 1-1/2 2 2-1/2
1
21 0.40 0.40 (0.35) 0.40 (0.35) 0.40 (0.35) 0.40 (0.35) —
22 0.65 0.65 (0.56) 0.60 (0.52) 0.60 (0.52) 0.60 (0.52) —
23 1.3 1.3 (1.1) 1.3 (1.1) 1.3 (1.1) 1.3 (1.1) —
24 2.3 2.3 (2.0) 2.3 (2.0) 2.3 (2.0) 2.3 (2.0) —
25 3.5 3.5 (3.0) 3.5 (3.0) 3.5 (3.0) 3.5 (3.0) —
26 4.5 4.5 (3.9) 4.5 (3.9) 4.5 (3.9) 4.5 (3.9) —
27 8.6 8.6 (7.4) 8.5 (7.3) 8.4 (7.2) 8.3 (7.2) —
28
10.0
a
a
Denotes a full port valve, without the characterized insert.
10.0 (8.6) 9.9 (8.6) 9.7 (8.4) 9.6 (8.3) —
29 14.9 14.9 (12.9) 14.6 (12.6) 14.1 (12.2) 13.5 (11.7) —
30 22.3
a
22.3 (19.2) 21.2 (18.3) 19.9 (17.2) 18.4 (15.9) —
31 30.8
a
30.8 (26.6) 28.0 (24.2) 25.2 (21.8) 22.3 (19.3) —
1
-1/4
41 4.1 — 4.1 (3.5) 4.0 (3.5) 4.0 (3.5) 4.0 (3.5)
43 8.7 — 8.7 (7.5) 8.6 (7.4) 8.6 (7.4) 8.5 (7.4)
44 12.7 — 12.7 (11.0) 12.6 (10.9) 12.4 (10.7) 12.3 (10.6)
45 19.4
a
— 19.4 (16.8) 19.2 (16.6) 18.5 (16.0) 18.1 (15.7)
46 34.1
a
— 34.1 (29.4) 32.9 (28.4) 29.9 (25.9) 28.3 (24.4)
1
-1/2
51 4.0 — — 4.0 (3.5) 4.0 (3.5) 4.0 (3.5)
52 8.3 — — 8.3 (7.2) 8.2 (7.1) 8.2 (7.1)
53 13.4 — — 13.4 (11.6) 13.3 (11.5) 13.2 (11.4)
54 23.5 — — 23.5 (20.3) 23.1 (19.9) 22.7 (19.6)
55 32.0
a
— — 32.0 (27.7) 31.0 (26.8) 30.0 (25.9)
56 61.1
a
— — 61.1 (52.8) 54.9 (47.5) 49.7 (43.0)
2
61 23.9 — — — 23.9 (20.7) 23.5 (20.3)
62 38.2 — — — 38.2 (33.0) 37.8 (32.7)
63 56.7
a
— — — 56.7 (49.0) 55.5 (47.9)
64 108.5
a
— — — 108.5 (93.9) 100.7 (87.1)