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Plei-Tech® check valve balls are used in pumps to improve pump performance and help pumps operate quietly. Polyurethane is ideally suited for ball check valves because of its outstanding abrasion and chemical resistance. The dynamic performance of Plei-Tech® polyurethanes allow for check valve operation at higher pressure and speeds.
Precision plastic balls from .75" to 10" are molded with or without metal inserts, and other polyurethane plastic ball sizes can also be custom molded. Both the urethane and the insert are selected to match performance demands with specific gravity needs. Durometers range from 80°A to 75°D. Pleiger Plastics Company can either furnish plastic balls "as cast" or "precision ground" for more exacting ball type check valve requirements. Below is a list of common plastic balls and their weight:
|
CHECK
VALVE BALLS
|
|
Size
(Inch)
|
Standard
Core Size
(inch)
|
Ball
Weight
without Core
(grams)
|
Ball
Weight
with core
(grams)
|
|
0.75
|
—
|
4
|
—
|
|
1.00
|
—
|
10
|
—
|
|
1.25
|
—
|
19
|
39
|
|
1.50
|
.71
|
32
|
86
|
|
1.75
|
.98
|
52
|
202
|
|
2.00
|
1.50
|
77
|
271
|
|
2.25
|
1.50
|
109
|
303
|
|
2.50
|
1.89
|
150
|
538
|
|
2.63
|
1.89
|
175
|
562
|
|
2.75
|
2.38
|
200
|
974
|
|
3.00
|
2.56
|
259
|
1222
|
|
3.25
|
2.56
|
330
|
1293
|
|
3.50
|
2.56
|
412
|
1375
|
|
4.00
|
3.43
|
615
|
2931
|
|
4.25
|
3.43
|
738
|
3054
|
|
4.50
|
3.43
|
876
|
3192
|
|
4.75
|
3.43
|
1030
|
3346
|
|
5.00
|
3.43
|
1201
|
3518
|
|
5.13
|
3.43
|
1297
|
3614
|
|
5.25
|
3.43
|
1391
|
3707
|
|
5.50
|
4.70
|
1599
|
7558
|
|
6.88
|
5.63
|
3129
|
13373
|
|
7.88
|
5.63
|
4702
|
14945
|
|
9.75
|
N/A
|
8907
|
N/A
|
Tolerances
| |
Standard
|
Other
Hardnesses (80A - 75D)
|
| Hardness |
95A
|
Add
40%
|
| Color |
Black
|
Varies
|
| Tolerances |
+/-
.020"
|
+/-
.030"
|
| Surface
Finish |
128
RMS
|
140RMS
|
|
English
| 
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