Composition
Stem packing composed by pure flexible graphite formed intermediate rings and graphite braided packing GR8622 as wiper rings
| Feature | U.M. | Value |
| Graphite Carbon Content | % | > 99.0 |
| Ash Content | % | ≤ 1.0 |
| Chloride Content | ppmv | ≤ 25.0 |
| Graphite Lubricant and/or Binder | -- | free |
| Density of the Graphite Packing Rings | Kg/m3 | 1120 ÷ 1280 |
| No. of Intermediate Rings | no. | minimum 3 |
| No. of Braided Wiper Rings | no. | 2 |
Characteristics
PGT4-GR8622 is the certified low emission stem seal complying with API std 622 3rd Edition and ISO 15848 BH C01 et C02 which makes a valid solution for reducing the type of seal used for the first use on new valves. Indeed, it can be used as much in the context of Oil & Gas and Chemicals, as in high pressure and temperature steam applications. PGT4-GR8622 it’s a special valve stem graphite sealing set composed by die-formed flexible graphite and wiper braided rings style GR8622. PGT4-GR8622, which meets the Low Emission requirements, guarantees long life service.
Applications
PGT4-GR8622 is specific for Low Emission services of Industrial Valves. Suitable also for HT/HP steam services.
