440/440M External Single Component Seal
Metal-Free Sealing for Corrosive and Sensitive Applications
The Chesterton 440/440M is designed for reliable sealing in corrosive environments—without any metal parts in contact with the fluid. It serves as a cost-effective alternative to exotic-metal seals and prevents damage to glass-lined shafts. Hydraulically balanced and sleeve-free, this versatile seal fits pump casings easily while maintaining tight sealing performance in general service and corrosive conditions
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Product Features
✔ Made to replace expensive exotic metal seals
✔ Perfect for glass lined shafts
✔ One-piece, drive-ring clamp for easy installation/positioning
5 key seal design features
✔ Balanced Design
✔ Non-Fretting
✔ Monolithic Seal Faces
✔ Stationary Design
✔ Protected Springs
Technical Data ↓
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25 mm to 115 mm (0.937 inch to 4.5 inch)
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711 mm (28") Hg Vacuum to 10 bar g (50 psig)
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-55 to 300 °C (-67 to 570 °F)
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4000 fpm
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20 m/s
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See back page for actual material limits by type of elastomer