Chesterton 286 Metal Bellows Cartridge Dual Seal

Chesterton 286 Bellows Seal - Double Seal, Cartridge-Style
Balanced Bellows Seal Design for Harsh Chemical Services

​​​​​​​​​The Chesterton 286 Dual Cartidge-Style Bellows Seal is designed ​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​for applications in which the process fluid is incompatible with common elastomers or where the cost of custom O-Rings is prohibitive. This bellows seal is used primarily in the chemical and petrochemical industries.

The high-strength, low-spring-rate bellows core delivers low-heat generation and reliable sealing performance. The self-cleaning rotary bellows design will reduce the clogging associated with sealing fluids with solids in suspension. The tandem bellows arrangement provides maximum pressure capability and safety performance.​​​​​​​

Dual seal - tandem arrangement
Welded metal bellows eliminates dynamic O-Rings
High-efficiency pumping mechanism creates a helical flow pattern for ideal internal cooling
Large diameter barrier fluid ports for increased flow
Bi-directional barrier fluid port​s operate on both clockwise and counterclockwise rotating equipment
Outboard bellows pressurized on the outside diameter for maximum safety and performance
Hydraulically-balanced bellows seal design
Rotary bellows for enhanced performance in slurry and particulate services
Corrosion-resistant Alloy C-276 bellows construction
Fits a wide range of pumps and other rotating equipment
​Sizes25 mm to 60 mm (1.00" to 2.5")
Pressure711 mm (28") Hg Vacuum to 10 bar g  (150 psig*) 10 bar g  (150 psig) inboard differential*
Temperature–55° C to 3000° C  (–67° F to 570° F*)
Speed20 m/s (4000 fpm)

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.



Catalog: Mechanical Seals (English) Mechanical Seals (English)pdf
Catalog: Rotating Equipment Solutions - Mechanical Seals, Pump Packing, Gaskets, and More (English) Rotating Equipment Solutions - Mechanical Seals, Pump Packing, Gaskets, and More (English)pdf
Brochure: Chesterton 186 and 286 Bellow Seals (English) Chesterton 186 and 286 Bellow Seals (English)pdf
Brochure: Chesterton 186HT Bellow Seal (English) Chesterton 186HT Bellow Seal (English)pdf
Installation Instructions: 186 286 (English) Instructions: 186 286 (English)pdf