Chesterton 280 Heavy Duty Double Cartridge Mechanical Seal

1 to 4.75in / 25 to 120mm shaft sizes, maximum solids handling capability, motion tolerant for mixer applications, oversized seal chamber option available.

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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

  • Standard and oversized seal chamber models available
  • Shaft sizes:
    • 1in to 4.75in (Standard Model), 1.375in to 4.75in (OS Chamber Model)
    • 25mm to 120mm (Standard Model Only)
  • -67 to 570°F (-55 to 300°C) operating temperature
  • 28in (711mm) Hg Vacuum to 600psig (40barg)
  • Face Materials:
    • Carbon Graphite
    • Silicon Carbide
    • Tungsten Carbide
  • Elastomers:
    • Tetrafluoroethylene-Propylene (FEPM)
    • ChemLast 550 (FFKM)/Fluorocarbon (FKM)
  • Up to 5000 FPM operating speed
  • 316 Stainless Steel / EN 1.4401 metal parts
  • Alloy C-276/EN 2.4819 springs
  • ISO-3069C, ASME B73.1, ASME B73.2, ATEX

The Chesterton 280 Heavy Duty Double Cartridge Mechanical Seal is a double seal design for severe duty and enhanced reliability in difficult applications, including agitators and mixers. The 280 Heavy Duty Double Cartridge Mechanical Seal is available Standard and oversized seal chamber models with a wide range of face and elastomer materials for your application.