Catalog excerpts
&CHESTERTON. Global Solutions, Local Service. 491 DINS/491 DINL Component Seal Easy to Install Rotary Component Seal for General Service The 491 DIN is available in two versions, the 491 DINS with Short non-pinned stationary and the 491 DINL with Long pinned stationary to prevent stationary rotation. The 491 is designed to minimize damage or fretting to the equipment shaft/sleeve as the dynamic O-Ring is positioned on a replaceable component surface. The balanced monolithic design provides a performance upgrade to standard component seals. The availability of Spare Parts Kits ensures quick and easy rebuild in the field. Reliable Upgrade from Original Equipment Seals ■ Monolithic seal faces ■ Balanced ■ Non-clog isolated springs Designed not to Fret Shaft or Sleeves ■ Dynamic O-Ring is positioned on a replaceable component surface Short Axial Length ■ Fits EN12756 L1K dimension (former DIN24960) Pressure 711 mm Vacuum - 10 barg (28" Hg - 150 psig) Temperature limits by elastomer selection Speed 20 m/s (4000 ftp) Stationary Face Sintered Silicon Carbide3 (SSC3) Ethylene-Propylene3 (EPDM3) Tetrafluoroethylene-Propylene (FEPM) Perfluoro-Elastomer (FFKM) Rotary Holder 316 Stainless Steel / EN 1.4401 Must use pinned stationary Food & Water Approvals with SSC/SSC/EP material combination only Standard materials
Open the catalog to page 1491 DINS without anti-rotation pin 491 DINL with anti-rotation pin KEY di - Shaft Diameter d3 - Seal Outside Diameter d4 - Seal Chamber Diameter d6 - Bore Diameter dy - Static Sealing Diameter l1k - Installation Length l3 - Rotary Operating Length I4 - Axial Static Length I5 - Chamfer Length l6 - Static Sealing Surface Length d8 - Anti-rotation Pin mx- Set Screw Size T - Static Shaft O-Ring U - Dynamic O-Ring V - Static Stationary O-Ring QUICK ORDER REFERENCE EXAMPLE - For quick and easy ordering please have the following information ready for your service representative. MODEL SIZE FACES...
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