Sun Pumps SPB 10-16C-1.0 - Manual (Page 9)

RESISTANCE OF VALVES AND FITTINGS
Nominal Equivalent Length of Standard Pipe in Feet
Pipe Inside 180 Tee Tee
Size Diameter Gate Globe Angle 45 90 Close Thru
Thru
Inches Inches Valve Valve Valve Elbow Elbow Ret Run
Branch
½ 0.622 0.41 18.5 9.3 0.78 1.67 3.71 0.93
3.33
¾ 0.824 0.54 24.5 12.3 1.03 2.21 4.90 1.23
4.41
1 1.049 0.69 31.2 15.6 1.31 2.81 6.25 1.56
5.62
1 ¼ 1.380 0.90 41.0 20.5 1.73 3.70 8.22 2.06
7.40
1 ½ 1.610 1.05 48.0 24.0 2.15 4.31 9.59 2.40
8.63
2 2.067 1.35 61.5 30.8 2.59 5.55 12.30 3.08
11.60
2 ½ 2.469 1.62 73.5 36.8 3.09 6.61 14.70 3.68
13.20
3 3.068 2.01 91.5 45.8 3.84 8.23 18.20 4.57
16.40
4 4.026 2.64 120.0 60.0 5.03 10.80 23.90 6.00
21.60
Arriving at a total line pressure loss, consideration should then be given to pressure
loss created by values, fittings and elevation of lines.
If a sufficient number of values and fittings are incorporated in the system to
materially affect the total line loss, add to the total line length, the equivalent length
of line of each value or fitting.