Chesterton 186 Bellows Cartridge Single Mechanical Seal

1 to 2.5in shaft sizes, welded metal rotary bellows, single cartridge design, used primarily in the chemical and petrochemical industries.

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Product Manual

Effective April 15th, 2025 Chesterton has added a 3% surcharge for all of their products. The surcharge will appear as a separate line item on the order.

Highlights...

Features

  • 1in to 2.5in shaft sizes
  • -67 to 570°F (-55 to 300°C) operating temperature
  • 28in (711mm) Hg Vacuum to 150psig (10barg)
  • Face Materials:
    • Carbon Graphite
    • Tungsten Carbide
    • Sintered Silicon Carbide
  • Elastomers:
    • Ethylene Propylene (EP)
    • Fluorocarbon (FKM)
    • TJ/FKM
  • Up to 4000 FPM operating speed
  • 316 Stainless Steel / EN 1.4401 metal parts
  • Alloy C-276/EN 2.4819 springs
  • ISO-3069C, ASME 873.1, 873.2

The Chesterton 186 Bellows Cartridge Single Mechanical Seal is an ideal solution for harsh chemical services that can cause difficulty with other seals. The 186 welded metal rotary bellows enhances reliability in certain applications by minimizing O-ring concerns. 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 and solids in suspension.