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1740Non- asbestos, Kevlar yarnChesterton 1740 is an interbraid packing using KEVLAR* yarn and lubricated with PTFE and other lubricants. Each strand of yarn has been individually coated in order to dissipate heat. 1740 can be installed as full sets to offer combined resistance to pressure, temperature, chemicals and wear. 1740 is also used as back-up rings for added extrusion resistance in abrasive applications. | 
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| Temperature Limit | 260° C (500° F) |
| | Chemical Resistance | pH 4-11 |
| | Pressure Limit | 20 bar g (300 psig) |
| | Shaft Speed | 10 m/sec (2000 fpm) |
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