31
Sun. Water.
Life.
BERNT LORENTZ GmbH & Co. KG
Kroegerskoppel 7, 24558 Henstedt-Ulzburg, Germany, Tel. +49 (0) 4193 7548 - 0, Fax - 29,
www.lorentz.de
All specifi cations and information are given with good intent, errors are possible and products may be subject to change without notice. Pictures may
differ from actual products depending on local market requirements and regulations.
v150106
Table 12: Friction loss for valves and fittings – equivalent length of straight pipe
1"
1 1/4"
1 1/2"
2"
2 1/2"
3"
4"
[ft]
[m]
[ft]
[m]
[ft]
[m]
[ft]
[m]
[ft]
[m]
[ft]
[m]
[ft]
[m]
90° normal elbow
2.7
0.8
3.5
1.1
4.3
1.3
5.5
1.7
6.5
2.0
8.0
2.4
10.1
3.1
45° elbow
1.3
0.4
1.7
0.5
2.0
0.6
2.5
0.8
3.0
0.9
3.8
1.2
5.4
1.6
90° long radius elbow
1.7
0.5
2.3
0.7
2.7
0.8
3.5
1.1
4.2
1.3
5.2
1.6
7.0
2.1
Close return bend
6.0
1.8
8.3
2.5
10.0
3.0
13.0
4.0
15.0
4.6
18.0
5.5
24.0
7.3
Globe valve
27.0
8.2
36.0
11.0
43.0
13.1
55.0
16.8
67.0
20.4
82.0
25.0
110.0
33.5
Angle valve
15.0
4.6
18.0
5.5
22.0
6.7
28.0
8.5
33.0
10.1
42.0
12.8
58.0
17.7
Gate valve
0.6
0.2
0.8
0.2
1.0
0.3
1.2
0.4
1.4
0.4
1.7
0.5
2.3
0.7
Check valve (swing)
7.0
2.1
9
2.7
11.0
3.4
13.0
4.0
16.0
4.9
20.0
6.1
26.0
7.9
Check valve (spring)
8.0
2.4
12
3.7
14.0
4.3
19.0
5.8
23.0
7.0
32.0
9.8
43.0
13.1