477-1T
- Chemically-Resistant Carbon Yarn Packing
Chesterton 477-1T is a tough, yet pliable, continuous filament carbon yarn packing impregnated throughout with PTFE to provide a non-contaminating, non-staining carbon yarn packing. Developed for the tough applications in the pulp and paper industry, 477-1T is specially designed to be used in high pressure feeders, pre-steaming vessels and applications that are moving abrasive slurries. This packing’s combined force of carbon yarn and PTFE dispersions increases its chemical resistance against strong caustic and acid mediums.
Chesterton 477-1T is also an excellent bottom anti-extrusion end ring when coupled with Chesterton 1400R Carbon-Reinforced Graphite Packing in rotating equipment. This combination is ideal for reducing or eliminating flush water from a stuffing box.
Product Features
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- Non-contaminating, non-staining carbon yarn packing
- Unique inorganic blocking agent stops gas/liquid penetration
- Molybdenum-based corrosion inhibitor resists stem pitting
Technical Data
| Applications |
For use in pulp and paper, pre-steaming vessels, high and low pressure feeders, grinding stone, hydropulpers, agitators, and mixers |
|---|---|
| Speed Max | 10 m/s ( 2000 fpm ) |
| Presssure Limit | 14 bar g (200 psig) |
| Temperature Limit | 260°C (500°F) |
| Chemical Resistance | pH 0 – 14 except strong oxidizers |
| Size Low | 3.0 mm ( 0.125 inch ) |
| Size High | 25.5 mm ( 1 inch ) |
| Notes |
Shaft Speed: 3000 ft/m (15 m/s) when used as a bottom anti-extrusion ring with 1400R |
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