General Specifications - Yamaha PW3028A Service Manual

GENERAL SPECIFICATIONS

Nominal Inside
Pipe Size Diameter
Inches Inches
1/2 0.622
3/4 0.824
1 1.049
1¼ 1.380
1½ 1.610
2 2.067
2½ 2.469
3 3.068
4 4.026
Arriving at a total line pressure loss, consideration should then be given to pressure loss created by valves, fittings and eleva-
tion of lines.
If a sufficient number of valves and fittings are incorporated in the system to materially affect the total line loss, and to the
total line length, the equivalent length of line of each valve or fitting.
HOSE FRICTION LOSS
PRESSURE DROP IN PSI PER 100 FT OF HOSE
WITH TYPICAL WATER FLOW RATES
Water*
Hose Inside Diameters, Inches
Flow Gal/
1/4 5/16
Min
0.5 16 5
1 54 20
2 180 60
3 380 120
4 220
5 320
6
8
10
15
20
25
30
40
50
60
*At a fixed flow rate with a given size hose, the pressure drop across a given hose
length will be directly proportional. A 50 ft. hose will exhibit one-half the pressure
drop of a 100 ft. hose. Above values shown are vaid at all pressure levels.
RESISTANCE OF VALVES AND FITTINGS
Gate Globe
Valve Valve
0.41 18.5
0.54 24.5
0.69 31.2
0.90 41.0
1.05 48.0
1.35 61.5
1.62 73.5
2.01 91.5
2.64 120.0
3/8 1/2 5/8 3/4
2
7 2
25 6 2
50 13 4
90 24 7
130 34 10
220 52 16
300 80 25
450 120 38
900 250 80
1600 400 121
650 200
250
410 162
600 235
370
Equivalent Length of Standard Pipe in Feet
Angle
Valve 45º Elbow 90º Elbow
9.3 0.78
12.3 1.03
15.6 1.31
20.5 1.73
24.0 2.15
30.8 2.59
36.8 3.09
45.8 3.84
60.0 5.03
1"
2
3
4
7 1
10 2
14 3
30 7
50 12
76 19
96 24
42
62
93
27
180º Tee Thru
Elbow
1.67 3.71 0.93
2.21 4.90 1.23
2.81 6.25 1.56
3.70 8.22 2.06
4.31 9.59 2.40
5.55 12.30 3.08
6.61 14.70 3.68
8.23 18.20 4.57
10.80 23.90 6.00
Tee Thru
Run Branch
3.33
4.41
5.62
7.40
8.63
11.60
13.20
16.40
21.60