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477-1TNon-contaminating, non-staining carbon yarn.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. 477-1T was developed for the tough applications in the pulp and paper industry. It is specially designed to be used in High Pressure Feeders, Pre-Steaming Vessels and applications that are moving abrasive slurries. The combination of the carbon yarn and PTFE dispersions increases the 477-1T chemical resistant properties when up against strong caustic and acid mediums. 477-1T is also an excellent bottom anti-extrusion end ring in combination with 1400R in rotating equipment. This combination is ideal when attempting to reduce or eliminate flush water from a stuffing box. | 
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| Temperature Limit | 260°C (500°F) |
| | Chemical Resistance | pH 0-14 except strong oxiders. |
| | Pressure Limit | 14 bar g (200psig) |
| | Shaft Speed | 10 m/sec (2000 fpm) 15 m/sec (3000 fpm) when used as a bottom anti-extrusion ring with 1400R. |
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