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Flow Losses for Valves and Fittings

Fluid Flow Table of Contents
Hydraulic and Pneumatic Knowledge

Flow Losses for Valves and Fittings in Equivalent Feet if Pipe. Losses are assumed with device in full open position.

Nominal
Pipe
Size
(in)
Valve and Fitting Fluid Flow Losses Data Given in Equivalents of Feet of Pipe

Globe
Valve
60º
Y Valve
45º
Y Valve
Angle
Valve
Gate
Valve
Swing
Check
Valve
Y
Strainer
90º
Elbow
45º
Elbow
Flow-Thru
Branch
1/2
18
9
7
7
0.7
6
3
1.6
0.8
3
3/4
22
11
9
9
0.9
8
4
2
0.9
4
1
29
15
12
12
1
10
5
2.6
1.3
5
1 1/4
38
20
15
15
1.5
14
9
3.3
1.7
7
1 1/2
43
24
18
18
1.8
16
10
4
2.1
8
2
55
30
24
24
2.3
20
27
5
2.6
10
2 1/2
69
35
29
29
2.8
25
28
6
3.2
12
3
84
43
35
35
3.2
30
42
7.5
4
15
3 1/2
100
50
41
41
4
35
48
9
4.7
18
4
120
58
47
47
4.5
40
60
10
5.2
21
5
140
71
58
58
6
50
80
13
6.5
25
6
170
88
70
70
7
60
110
16
7.9
30
8
220
115
85
85
9
80
150
20
10
40
10
280
145
105
105
12
100
190
25
13
50
12
320
165
130
130
13
120
250
30
16
60
14
360
185
155
155
15
135
-
34
18
68
16
410
210
180
180
17
150
-
38
20
78
18
460
240
200
200
19
165
-
42
23
85
20
520
275
235
235
22
200
-
50
26
100
24
610
320
265
265
25
240
-
60
30
115

Reference: Carrier Binder, Chapter 3 Piping Design

 

Nominal
Pipe
Size
(mm)
Valve and Fitting Fluid Flow Losses Data Given in Equivalents of Meters of Pipe
Globe
Valve
60 º
-Y Valve
45º
Y Valve
Angle
Valve
Gate
Valve
Swing
Check
Valve
Y
-Strainer
90 º
Elbow
45 º
Elbow
Flow-Thru
Branch
15
5.5
2.7
2.1
2.1
0.2
1.8
0.9
0.5
0.2
0.9
20
6.7
3.4
2.7
2.7
0.3
2.4
1.2
0.6
0.3
1.2
25
8.8
4.6
3.7
3.7
0.3
3.0
1.5
0.8
0.4
1.5
32
11.6
6.1
4.6
4.6
0.5
4.3
2.7
1.0
0.5
2.1
40
13.1
7.3
5.5
5.5
0.5
4.9
3.0
1.2
0.6
2.4
50
16.8
9.1
7.3
7.3
0.7
6.1
8.2
1.5
0.8
3.0
65
21.0
10.7
8.8
8.8
0.9
7.6
8.5
1.8
1.0
3.7
80
25.6
13.1
10.7
10.7
1.0
9.1
12.8
2.3
1.2
4.6
90
30.5
15.2
12.5
12.5
1.2
10.7
14.6
2.7
1.4
5.5
100
36.6
17.7
14.3
14.3
1.4
12.2
18.3
3.0
1.6
6.4
125
42.7
21.6
17.7
17.7
1.8
15.2
24.4
4.0
2.0
7.6
150
51.8
26.8
21.3
21.3
2.1
18.3
33.5
4.9
2.4
9.1
200
67.1
35.1
25.9
25.9
2.7
24.4
45.7
6.1
3.0
12.2
250
85.4
44.2
32.0
32.0
3.7
30.5
57.9
7.6
4.0
15.2
300
97.6
50.3
39.6
39.6
4.0
36.6
76.2
9.1
4.9
18.3
350
109.8
56.4
47.3
47.3
4.6
41.2
-
10.4
5.5
20.7
400
125.0
64.0
54.9
54.9
5.2
45.7
-
11.6
6.1
23.8
450
140.2
73.2
61.0
61.0
5.8
50.3
-
12.8
7.0
25.9
500
158.5
83.8
71.6
71.6
6.7
61.0
-
15.2
7.9
30.5
600
186.0
97.6
80.8
80.8
7.6
73.2
-
18.3
9.1
35.1

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