This bellows seal enhances reliability by minimizing O-Ring concerns. The Chesterton 186 (single) and 286 (double) Bellows Seals are 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 seal design will reduce the clogging associated with sealing fluids with solids in suspension​​.