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They combine aramid fibre with SBR rubber enhanced with another high-quality elastomer adding greatly to their useful chemical resistance.
Tough and flexible, they cut to exact dimensions without loose fibres. Under normal service conditions it is virtually impossible to crack these sheet even when bent on a mandrel with a radius 0f only 3 times the sheet thickness.
940 sheet packings are not recommended for service against most aromatic hydrocarbons, acids, caustics, fuel and solvents.
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Operating Limits & Specifications |
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| Max Pressure Rating (psi) | 1000 |
| Max Temp. Limit (oF) | 600 |
| Max Contin. Temp. Limit (oF) | 400 |
| Max P x T | 350,000 |
| m value | 5.2 |
| y value (psi) | 3600 |
| ASTM F36 Compressibility (%) | 15 - 35 |
| ASTM F36 Recovery | (% min) 40 |
| ASTM F37 Sealability (ml/min) Sg=1000 psi=30 | 0.04 |
| BS 7531 Gas Leakage (ml/min) | <1.0 cc/min |
| ASTM F38 Creep Relaxation (%) | 21 |
| BS 7531 Residual Stress (mpa) | 17 |
| ASTM F146 Fuel B @ 70-85 F Thick. Increase (%) | 10 - 25 |
| IRM 903 @ 300 oF Thickness Increase (%) | 15 - 35 |
| ASTM Fuel B @ 70-85 oF Weight Increase (%) | 20 max. |
| ASTM F152 Average Tensile (psi) | 2300 |
| Density (g/cm3) | 1.20 |
| Rubber Binder | SBR |
| Colour | Off-Red |