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U18
Parker Hannifin Corporation
Tube Fittings Division
Columbus, Ohio
http://www.parker.com/tfd
4300 Catalog
General Technical
Dimensions and pressures for reference only, subject to change.
Recommended Flow Diameters – In Millimeters
Table U14 — Recommended Flow Diameters, in
Millimeters
* LPM = Liters Per Minute
Maximum
Flow Rate
LPM*
Recommended Flow Diameter
in Millimeters
Pressure
Lines
Return
Lines
Suction
Lines
1
1.670
2.640
4.180
2
2.362
3.734
5.911
3
2.893
4.573
7.240
4
3.340
5.280
8.360
5
3.734
5.903
9.347
6
4.091
6.467
10.239
7
4.418
6.985
11.059
8
4.723
7.467
11.823
9
5.010
7.920
12.540
10
5.281
8.348
13.218
12
5.785
9.145
14.480
14
6.249
9.878
15.640
16
6.680
10.560
16.720
18
7.085
11.201
17.734
20
7.468
11.806
18.694
22
7.833
12.383
19.606
24
8.181
12.933
20.478
26
8.515
13.461
21.314
28
8.837
13.970
22.118
30
9.147
14.460
22.895
32
9.447
14.934
23.646
34
9.738
15.394
24.373
36
10.020
15.840
25.080
38
10.295
16.274
25.767
40
10.562
16.697
26.437
45
11.203
17.710
28.040
50
11.809
18.668
29.557
55
12.385
19.579
31.000
60
12.936
20.449
32.378
65
13.464
21.284
33.700
70
13.972
22.088
34.972
75
14.463
22.863
36.200
80
14.937
23.613
37.387
85
15.397
24.340
38.538
90
15.843
25.045
39.655
95
16.277
25.732
40.742
100
16.700
26.400
41.800
110
17.515
27.689
43.840
120
18.294
28.920
45.790
130
19.041
30.101
47.659
140
19.760
31.237
49.458
150
20.453
32.333
51.194
160
21.124
33.394
52.873
170
21.774
34.421
54.501
180
22.405
35.419
56.081
190
23.019
36.390
57.617
200
23.617
37.335
59.114
220
24.770
39.158
61.999
240
25.872
40.899
64.756
260
26.928
42.569
67.400
280
27.944
44.176
69.945
Maximum
Flow Rate
LPM*
Recommended Flow Diameter
in Millimeters
Pressure
Lines
Return
Lines
Suction
Lines
300
28.925
45.726
72.400
320
29.874
47.226
74.774
340
30.793
48.679
77.075
360
31.686
50.090
79.310
380
32.554
51.463
81.483
400
33.400
52.800
83.600
450
35.426
56.003
88.671
500
37.342
59.032
93.468
550
39.165
61.913
98.030
600
40.906
64.667
102.389
650
42.577
67.307
106.570
700
44.184
69.848
110.592
750
45.735
72.299
114.474
800
47.235
74.670
118.228