Chesterton 280 Heavy-Duty Cartridge Dual Seal

Chesterton 280 Cartridge Double Mechanical Seal
Heavy Duty Capabilities for Difficult Applications

​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​This double mechanical seal allows for a new, higher level of reliability and performance with the convenience of a cartridge seal.  The Chesterton 280™ Double Mechanical Seal is specifically designed to handle demanding, high-torque applications.

This product is an ideal selection for such difficult applications as high concentration black liquor, hard-to-seal monomers such as acrylonitrile, vinyl chloride monomer, and any other potentially viscous solidifying liquids.

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Heavy Duty Double Mechanical Seal with Cartridge Design
High-reliability sealing​
Maximum solids handling capability
Superior performance for demanding applications
Motion tolerant for mixer applications*​
Operating ConditionsMaterials
Sizes25 mm to 120 mm (1.00" to 4.75")FacesCB, SSC
Pressure711 mm (28") Hg Vacuum to 20 bar g (300 psig) 17 bar g (247 psig) outboard ElastomersFKM, EPDM, FEPM, ChemLast™
Temperature-55° C to 300° C (-67˚ F to 570˚ F)Metals1.4401 (316SS)
Speed20 m/s (4000 fpm)Springs2.4819 (Alloy C-276)
Fits ISO-3069, ASME B73.1, B73.2

Fits ISO-3069, ASME B73.1, B73.2, ATEX Category I, Group 2 approved ​

​*Extended motion capability available in 280M version.



Catalog: Mechanical Seals (English) Mechanical Seals (English)pdf
Installation Instructions: 280 (English) Instructions: 280 (English)pdf
Technical Material Reference (English) Material Reference (English)pdf
Environmental Control Plans (English) Control Plans (English)pdf
Brochure: Chesterton 280 Dual Cartridge Seal (Nihongo) Chesterton 280 Dual Cartridge Seal (Nihongo)pdf