This high-performance, single rotary seal is capable of addressing a wide variety of applications. This version of the 491 is manufactured in Germany specifically for Europe/Middle East/Africa markets.
Chesterton 491 can be run against many different stationary seal rings for maximum flexibility in many applications. The non-fretting design will not destroy the shaft sleeve or any metal parts. The 491 has a balanced O-Ring design with anti-clog features, springs out of the fluid, dynamic O-Ring moves on a clean surface.
| Monolithic seal faces |
| Balanced |
| Non-clog isolated springs |
| Dynamic O-Ring is positioned on a replaceable component surface |
| Fits EN12756 L1K dimension |
| Technical Data | |
| Sizes | 16 mm to 110 mm (0.625″ to 4.375″) |
| Pressure | 711 mm (28″) Hg Vacuum to 10 bar g (150 psig*) |
| Temperature | -55° C to 300° C ( -67 ̊ F to 570 ̊ F) |
| Speed | 20 m/s (4000 fpm) |
