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.

Download 3D and 2D CAD Models for Chesterton 280:

(Free sign-up required on 3D ContentCentral)​

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.

Sealed pressure capabilities are dependent on the fluid sealed, temperature, speed and face combination. Consult Chesterton Mechanical Seal Engineering to confirm suitability for your application and to receive a product recommendation.



Brochure: Chesterton 280 Heavy Duty Dual Seal (English) Chesterton 280 Heavy Duty Dual Seal (English)pdf
Installation Instructions: 280 (English) Instructions: 280 (English)pdf
Technical Material Reference (English) Material Reference (English)pdf
Catalog: Mechanical Seals (English) Mechanical Seals (English)pdf
Catalog: Chesterton Core Products - Fluid Sealing, Lubricants/MRO, Coatings (English) Chesterton Core Products - Fluid Sealing, Lubricants/MRO, Coatings (English)pdf