The frequently used ball valve soft seal materials are as follows:
Properties |
PTFE |
NYLON |
PEEK |
PCTFE |
DEVLON |
|
Temperature Range(℃) |
-100~150 |
-50~80 |
-100~250 |
-196~150 |
-40~120 |
|
Pressure Rating(LB) |
150~300 |
600~1500 |
600~2500 |
150~300 |
600~1500 |
|
Mechanical Property |
Hardness(D) |
58 |
72 |
88 |
85 |
78 |
Tensile Strength(MPa) |
14~34 |
55.2 |
134 |
35.9 |
79.9 |
|
Tensile longation(Break,%) |
350 |
250 |
2.2 |
150 |
5.4 |
|
Physical Property |
Specific Gravity(g/cm³) |
2.17 |
1.02 |
1.44 |
2.12 |
1.14 |
Water Absorption 24hrs(%) |
0.00 |
1 |
0.06 |
0.00 |
0.1 |
|
Water Absorption saturation |
<0.01 |
1.60 |
2 |
<0.01 |
3 |
|
Service Application |
Chemical& Low temperature |
High Pressure& Hydrocarbon |
High Pressure& Hydrocarbon |
Cryogenic |
High Pressure& Hydrocarbon |
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