491 DINS-DINL Rotary Internal Single Seal (EMEA)
EMEA‑Manufactured, High‑Performance Component Seal
The Chesterton 491 DINS and 491 DINL are high-performance rotary component seals designed and manufactured in the EMEA region. Built to meet EN12756 L1K standards, these seals offer long-lasting performance and application flexibility for a wide range of industrial equipment. The non-fretting design helps protect shaft sleeves and metal components from damage, while the balanced O‑ring with anti-clog features ensures smooth and reliable sealing. With springs isolated from process fluids, the design minimizes contamination and enhances seal life. Ideal for general-duty use, the 491 DINS/DINL operates in temperatures from –55 °C to 300 °C, pressures up to 10 bar, and speeds up to 20 m/s.
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Product Features
✔ Monolithic seal faces
✔ Balanced
✔ Non-clog isolated springs
✔ Dynamic O-Ring is positioned on a replaceable component surface
✔ Fits EN12756 L1K dimension
5 key seal design features
✔ Balanced Design
✔ Non-Fretting
✔ Monolithic Seal Faces
✔ Stationary Design
✔ Protected Springs
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16 mm to 110 mm
Technical Data ↓
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711 mm (28") Hg Vacuum to 10 bar g (150 psig)
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-55 to 300 °C (-67 to 570 °F)
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20 m/s ( 4000 fpm )