Pressure losses of tubes with hydraulic oil with a viscosity of 20 cSt at regime temperature (system warm) and
of 100 cSt during start-up from cold. The assumption of viscosity is obviously arbitrary, but similar to real
conditions.
The table below gives the pressure loss values (Bar) per linear meter of tube.
Oil viscosity 20 Cts
L=1 m
litres/1'
10
0.85
15
1.72
20
2.9
30
5.8
40
9.6
50
14.2
60
19.5
Oil viscosity 20 Cts
L=1 m
10
0.29
15
0.60
20
1.0
30
2.0
40
3.3
50
4.9
60
6.8
70
8.9
Oil viscosity 20 Cts
L=1 m
20
0.4
30
0.9
40
1.5
50
2.2
60
3.0
70
3.9
80
4.9
90
6.1
100
7.3
Oil viscosity 20 Cts
L=1 m
30
0.2
40
0.4
50
0.6
60
0.8
70
1.0
80
1.3
90
1.5
100
1.8
ø1/4 G - ø 6,4 mm approx.
L= 5 m
L=10 m
4.2
8.5
8.6
17.2
14.3
28.5
29.0
58.0
48.0
96.0
71.0
142.0
97.5
195.0
ø5/16 G - ø 8,0 mm approx.
L= 5 m
L=10 m
1.5
2.9
3.0
6.0
5.0
9.9
10.0
20.0
16.6
33.2
24.6
49.1
33.8
67.5
44.3
88.5
ø3/8 G - ø 9,5 mm approx.
L= 5 m
L=10 m
2.2
4.4
4.5
8.9
7.4
14.7
10.9
21.7
15.0
29.9
19.6
39.1
24.7
49.4
30.5
61.0
36.5
73.0
ø1/2 G - ø 12,7 mm approx.
L= 5 m
L=10 m
1.1
2.2
1.9
3.7
2.8
5.5
3.8
7.5
5.0
9.9
6.3
12.5
7.7
15.3
9.2
18.4
Oil viscosity 100 Cts
L=20 m
L=1 m
16.9
3.3
34.4
5.0
57.0
6.6
116.0
9.9
192.0
14.3
284.0
21.2
390.0
29.1
Oil viscosity 100 Cts
L=20 m
L=1 m
5.9
1.4
11.9
2.0
19.8
2.7
40.0
4.1
66.4
5.4
98.2
7.3
135.0
10.1
177.0
13.2
Oil viscosity 100 Cts
L=20 m
L=1 m
8.8
1.4
17.8
2.1
29.4
2.7
43.4
3.4
59.8
4.5
78.2
5.9
98.8
7.4
122.0
9.1
146.0
10.9
Oil viscosity 100 Cts
L=20 m
L=1 m
4.5
0.6
7.4
0.9
11.0
1.1
15.0
1.3
19.8
1.5
25.0
1.9
30.6
2.3
36.8
2.8
L= 5 m
L=10 m
16.5
33.0
24.8
49.5
33.0
66.0
49.5
99.0
71.5
143.0
106.0
212.0
145.5
291.0
L= 5 m
L=10 m
6.8
13.5
10.1
20.3
13.5
27.0
20.3
40.6
27.0
54.0
36.7
73.4
50.5
101.0
66.1
132.2
L= 5 m
L=10 m
6.8
13.6
10.3
20.5
13.6
27.2
17.0
34.0
22.3
44.6
29.3
58.5
36.9
73.8
45.5
91.0
54.5
109.0
L= 5 m
L=10 m
3.2
6.4
4.3
8.5
5.3
10.7
6.4
12.8
7.5
14.9
9.3
18.6
11.5
22.9
13.8
27.5
L=20 m
66.0
99.1
132.0
198.0
286.0
424.0
582.0
L=20 m
27.0
40.6
54.0
81.2
108.0
146.8
202.0
264.4
L=20 m
27.2
41.0
54.4
68.0
89.2
117.0
147.6
182.0
218.0
L=20 m
12.8
17.0
21.3
25.6
29.8
37.2
45.8
55.0
20
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