491 DIN Rotary Internal Single Seal (Global)
- DIN Rotary Pusher Single Seal
The 491 is designed in accordance with EN 12756 to fit the short length installation requirements.
The 491 is designed not to damage or fret the equipment shaft/sleeve because the dynamic O-Ring is positioned on a replaceable component surface. This balanced, high-pressure monolithic seal design will provide a performance upgrade to standard, original equipment component seals. The seal can be easily rebuilt in the field using low-cost rebuild kits.
Product Features
-
- Monolithic seal faces
- Balanced
- Non-clog isolated springs
- Dynamic O-Ring is positioned on a replaceable component surface
- Fits EN 12756 L1K dimension
Technical Data
| Size Range | 16 mm to 110 mm |
|---|---|
| Applicable Standards and Approvals | ISO-3069-S, NSF61, ATEX |
| Variants |
491 DINS 491 DINL |
Materials
| Faces | CB, TC, SSC |
|---|---|
| Elastomers | FKM, EPDM, FEPM, FFKM |
| Metals | EN 1.4401 (316SS) |
| Springs | EN 2.4819 (Alloy C-276) |
Operating Conditions
| Temperature | -55 to 300 °C (-67 to 570 °F) |
|---|---|
| Speed | 20 m/s ( 4000 fpm ) |
| Pressure |
10 bar g (150 psig) |
| Notes |
Seal pressure capabilities are dependent on the fluid sealed, temperature, speed, and seal face combinations. For operation outside the limits and additional materials consult Chesterton Mechanical Seal Engineering. |
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