Handbook of Civil Engineering Calculations

Capacity, L/s

FIGURE 12. Capacity ranges of some rotary pumps. (Worthing Corpora-

tion.)

TABLE 7. Capacities of Typical Horizontal Duplex Plunger Pumps

Cold-water pressure service

Size Piston speed

in cm gal/min L/s ft/min m/min

6 x 3 l/2 x 6 15.2 x 8.9 x 15.2 60 3.8 60 18.3

71 X 2 x 4Y 2 x 10 19.1 x n.4 x 25.4 124 7.8 75 22.9

9 x 5 x 10 22.9 x 12.7 x 25.4 153 9.7 75 22.9

10 x 6 x 12 25.4 x 15.2 x 30.5 235 14.8 80 24.4

12 x 7 x 12 30.5 x 17.8 x 30.5 320 20.2 80 24.4

Boiler-feed service

Size Boiler Piston speed

in cm gal/min L/s hp kW ft/min m/min

6 x 3i/ 2 x 6 15.2 x 8.9 x 15.2 36 2.3 475 354.4 36 10.9

71 X 2 x 41 X 2 x 10 19.1 x 11.4 x 25.4 74 4.7 975 727.4 45 13.7

9 x 5 x 10 22.9 x 12.7 x 25.4 92 5.8 1210 902.7 45 13.7

10 x 6 x 12 25.4 x 15.2 x 30.5 141 8.9 1860 1387.6 48 14.6

12 x 7 x 12 30.5 x 17.8 x 30.5 192 12.1 2530 1887.4 48 14.6

Source: Courtesy of Worthington Corporation.

Capacity, gal/min

Sliding-vone

Herringbone- type

gear type

Herringbone-

gear type

Pressure,

KPa

Pressure,

ib/in

2