Plastic Balls(6778bytes)
Plastic balls

TechneŽ Hollow Plastic Balls

  • Inexpensive
  • Control heat loss for heated liquids
  • Control cold loss for cooled liquids
  • Reduces fumes
  • Stop odors
  • Conserve expensive chemicals
  • Avoid splashing and condensation
  • Save energy

Technical Data

Click here to see chemical resistance and other technical details of plastics

Polyethylene is chemically unreactive although strong oxidizing agents have some effect over a long period 
of time. HDPE is more resistant to attack than LDPE. Maximum recommended temperature for HDPE is 82ēC (180°F) and for LDPE is 49ēC (120°F). Polypropylene is better than polyethylene in chemical and temperature resistance except with oxidizing agents where polyethylene is preferable. Maximum recommended temperature of Polypropylene is 104ēC (220°F).

In general terms we recommend that polypropylene balls be used except as stated above and in particular - use
HDPE in chromic acid. As outdoor covers, particularly for reducing odor, heat loss, etc., LDPE generally are
satisfactory. Specify black balls to withstand sunlight (balls are usually supplied in opaque white) and, to resist winds, choose larger and therefore heavier balls. Click for technical details on different plastics including chemical resistance. All information is provided as a guide only. Balls are not guaranteed for use in specific solutions. When in doubt request
sample balls or enter a small trial order.

Heat loss data

The amount of heat lost through evaporation for each open square foot of surface depends on the liquid
temperature. Check this table to see how much heat you are losing at the moment. Remember balls will
save 75% of loss.

Ball diameter

The percentage of area covered by the balls in independent of the ball diameter, being the ratio of 
a circle to the hexagon which surrounds it or p/2Ö 3 or 91%. Area covered = Area of three 60° segments 
of circle divided by area of triangle. = (3.p r2 ) / (1/2 . 2r . r3) = p/2Ö 3

From water at these temperatures, °F Heat loss in watts/ft2 at 40% relative humidity.
80 40
100 80
120 155
140 270
160 445
180 700
200 1075

Ordering Information     (Note: ball sizes are in MM, divide by 25.4 to get inches)

Catalog # Description Quantity Catalog # Description Quantity
4010100 PP-10 balls 5000/pk 4020200 HDPE-20 balls 2000/pk
4010200 PP-20 balls 2000/pk 4020300 HDPE-25 balls 1000/pk
4011000 PP-20 balls 500/pk 4020400 HDPE-38 balls 1000/pk
4010300 PP-25 balls 1000/pk 4020600 HDPE-50 balls 1000/pk
4010400 PP-38 balls 1000/pk 4020800 HDPE  -100 balls 100/pk
4011100 PP-38 balls 100/pk      
4010600 PP-50 balls 1000/pk      
4010700 PP-75 balls 500/pk      
4010800 PP-100 balls 100/pk      

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