PTFE Impregnated Carbon Packing
Made by heart-braiding pre-oxidized carbon fiber impregnated with PTFE emulsion. Both strong and flexible with stable structure, it effectively blocks gas and liquid penetration. Chemically stable, well lubricated, extremely low friction and highly conductive with shaft protection; its unique inorganic blocking and anti-corrosion agents prevent media penetration and shaft corrosion. Suitable for pump and valve sealing in steam, water, solvent, acid and alkali environments.
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| Property | Unit | Specification |
|---|---|---|
| bulk density | g/cm³ | ≥ 1.1 |
| loss on heating | ℃ | ≤ 6 |
| compression ratio | % | 25~45 |
| recovery rate | % | ≥ 25 |
| coefficient of friction | ≤ 0.15 | |
| abrasion loss | g | ≤ 0.1 |
| acid loss (5% sulfuracid) | % | ≤ 5 |
| alkali loss(25% NaOH) | % | - |
| alkali loss(5% NaOH) | % | ≤ 8 |
| Property | Parameter |
|---|---|
| maximum temperature | 240℃ |
| maximum linear velocity | 15m/s |
| PH range | 1-13 |
| pump pressure up to | 30kg/cm² |
| valve pressure up to | 250kg/cm² |
| Size(Packing cross-section) | 3.0 | 4.0 | 5.0 | 6.0 | 8.0 | 10.0 | 12.0 | 14.0 | 16.0 | 18.0 | 20.0 | 22.0 | 25.0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| limit deviation | ±0.2 | ±0.3 | ±0.5 | ±0.7 | ±1.0 |