W = D3 + 00 / C ;

Weight Of Balls 302

When D = diameter of ball in inches; W = weight of ball in lbs.; C= aconstant = 733 for cast iron; = 464 for lead; = 595 for copper; = 635 for brass, or,

W = D3 X C;

When C = a constant = 0.1364 for cast iron;

When C = a constant = 0.1364 for cast iron;

= 0.2155 for lead; = 0.168 for copper; = 0.1574 for brass.

Weight of cast-iron balls.

To find nominal horse power of boiler required for direct acting steam pumps.

To find nominal horse-power of boiler required for direct-acting steam-pumps.

Nhp =

D2 - the last figure

2

When Nhp = nominal horse-power;

D = diameter of steam cylinder in inches.