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Metal Balls

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Polypropylene Balls

Polypropylene Hollow Spheres

Hollow

White Polypropylene Spheres :  

Polypropylene is lightweight and an excellent electrical insulator. It has a hard, very smooth surface that prevents bacteria and resists chemical corrosion.

Polypropylene Solid Balls

Solid

Spheres float on surface of liquid in open tank and thereby greatly reduce the exposed liquid surface area - up to 90%. Dramatically diminish objectionable fumes and odors. Blanket of spheres also insulates heated liquid reducing evaporation and heat requirements. Ideal for plating tanks and similar open tank installations where the liquid surface can be covered with a blanket of spheres without impeding access to the tank for process purposes. Spheres are hollow and will float on any liquid. No welt or rim on which chemicals can deposit, and being smooth they ensure a much tighter surface cover. Polypropylene, non-toxic and able to withstand continuous working temperatures of 110° C (230°F) Polypropylene is suitable for use in most known chemicals. High Density Polyethylene generally suitable as above but with a continuous working temperature limitation of 80° C. (176° F) softening point about 110° C (230°F). High density polyethylene has better chemical resistance to certain compounds like oil, and other hydro-carbons. Also less stress cracking at low temperatures than polypropylene. Color white translucent except 100 mm, black for outside use. All sizes are blow molded.
Chemical Resistance Chart

Diameter Inches Tolerance Stock Number Solid or Hollow Balls per Pkg. Cost per Pkg Purchase
.125 ±.002" KB-205 Solid 500 $30.00 Purchase
.156 ±.002" KB-002 Solid 500 $18.38 Purchase
.188 ±.002" KB-003 Solid 500 $23.80 Purchase
.219 ±.002" KB-004 Solid 250 $19.11 Purchase
.250 ±.002" KB-005 Solid 250 $18.90 Purchase
.313 ±.002" KB-006 Solid 250 $23.45 Purchase
.375 ±.002" KB-007 Solid 100 $16.77 Purchase
.375(10mm) N/A KB-005T Hollow 5000 $622.00 Purchase
.438 ±.002" KB-206 Solid 100 $17.50 Purchase
.500 ±.002" KB-008 Solid 100 $24.08 Purchase
.625 ±.002" KB-009 Solid 50 $18.13 Purchase
.750 ±.002" KB-010 Solid 25 $17.89 Purchase
.875 ±.002" KB-207 Solid 100 $35.00 Purchase
.787 ±.008" KB-135 Hollow 150 $49.81 Purchase
.787 ±.008" KB-136 Hollow 2000 $485.24 Purchase
.750 ±.002" KB-204 Solid 100 $77.00 Purchase
1.00 ±.002" KB-011 Solid 100 $134.80 Purchase
.984 ±.008" KB-137 Hollow 50 $31.50 Purchase
.984 ±.008" KB-138 Hollow 100 $56.60 Purchase
.984 ±.008" KB-139 Hollow 1000 $416.57 Purchase
1.400 ±.005" KB-141 Hollow 50 $43.75 Purchase
1.496 ±.080" KB-142 Hollow 50 $50.19 Purchase
1.496 ±.080" KB-143 Hollow 1000 $689.85 Purchase
1.750 ±.080" KB-197 Hollow 500 $438.92 Purchase
1.969 ±.080" KB-144 Hollow 40 $59.29 Purchase
1.969 ±.080" KB-145 Hollow 1000 $1195.85 Purchase
3.937 ±.080" KB-146 Hollow 10 $69.30 Purchase
3.937 ±.080" KB-147 Hollow 100 $629.62 Purchase
Ball diameter and surface coverage
Diameter (IN) Average weight (g) Number per ft² Number per m² 
3/8" 0.2 1,076 11,600
3/4" 1.0 270 2,900
1.0" 1.5 172 1,850
1 1/2" 4.5 74 800
1 3/4" 7.0 53 570
2.0" 8.0 43 465
2.25" 16.0 22 235
4.0" 40.0 10 116
4.5" 100.0 4.8 51.5
The percentage of area covered by the balls is independent of the ball diameter, being the ratio of a circle to the hexagon which surrounds it. This equates to 91% of the liquid surface area. The frictional contact points ensure that each ball remains stable when subjected to increased liquid or air turbulence.

Heat and liquid loss savings
  Open  Surface 1 layer  1.5" balls
Average Surface
Temperature oC
90       70      50 90        70      50
Energy consumption
Kwh/h
10.73    4.61    1.61 2.70    1.31    0.60
Percentage energy;
saving
-         -          - 75%    71%     65%
Evaporation
litres/m²h
13.05   4.97   1.45 1.67    0.41    0.14
Percentage
evaporation saving
-         -           - 87%    91%    90%
Test Tank Dimensions = 600mm(W) x 1850mm(L) x 1000mm(H).