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F-27855-10174
27 | schneider-electric.com Selection Guide
January, 2019 tc © 2019 Schneider Electric. All rights reserved. All trademarks are owned by Schneider Electric Industries SAS or its affiliated companies.
Document Number: F-27086-14
Using Pipe Reducers with 2-Way Ball Valve Assemblies
a - Denotes a full port valve, without the characterized insert.
The following table provides estimated effective Cvs when using a 2-way valve assembly on the same or lager pipe size. Use
these estimated effective Cvs in place of the rated Cvs along with at least 6 valve size diameters of straight pipe upstream and 3
valve size diameters of straight pipe downstream of the valve body.
WARNING: Do not reduce the valve size to less than one-half the line size, as this may weaken the pipe reduction area.
Physical injury can result if the weakened piping fails.
Table-18. Estimated Effective Cv when Using Pipe Reducers with 2-Way Ball Valve Assemblies.
Valve
Size
in.
P
Code
C
v
Estimated Effective Cv (Kvs)
Pipe Size - inches (NPT)
1/2 ¾ 1 1¼ 1½ 2 2½ 3 4 5
1/2
01 0.38
0.38
(0.33)
0.38
(0.33)
0.38
(0.33)
- -
-
02 0.68
0.68
(0.59)
0.68
(0.59)
0.68
(0.59)
03 1.3
1.3
(1.12)
1.3
(1.12)
1.3
(1.12)
04 2.6
2.6
(2.24)
2.5
(2.16)
2.5
(2.16)
05 4.7
4.7
(4.06)
4.3
(3.71)
4.1
(3.54)
06 8.0 8.0 (6.9) 6.5 (5.6) 5.7 (4.9)
07 11.7
a
11.7
(10.1)
7.9 (6.8) 6.7 (5.8)
¾
11 0.31
-
0.31
(0.27)
0.31
(0.27)
0.31
(0.27)
0.31
(0.27)
12 0.63
0.63
(0.54)
0.63
(0.54)
0.63
(0.54)
0.63
(0.54)
13 1.2
1.2
(1.04)
1.2
(1.04)
1.2
(1.04)
1.2
(1.04)
14 2.5
2.5
(2.16)
2.5
(2.16)
2.5
(2.16)
2.5
(2.16)
15 4.3
4.3
(3.71)
4.3
(3.71)
4.2
(3.63)
4.2
(3.63)
16 10.1
10.1
(8.7)
9.6 (8.3) 9.1 (7.9)
8.8 (7.6)
17 14.7
a
14.7
(12.7)
7.1 (6.1) 6.5 (5.6) 6.2 (5.4)
18 28.6
a
28.6
(24.7)
21.1
(18.2)
17.1
(14.8)
15.4
(13.3)
VB-2000 Series Ball Valves
with SmartX Actuators
8. VBB/VBS and VB-2000 Series
Ball Valve Assemblies
8. VBB/VBS and VB-2000 Series
Ball Valve Assemblies