Chesterton 440 External Single Component Mechanical Seal

0.9375 to 3.75in / 24 to 65mm, designed for corrosive service and metallic-free applications, replaces exotic metal seals.

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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

  • Shaft sizes:
    • 0.9375 to 3.75in
    • 24 to 65mm
  • -67 to 570˚F (-55 to 300˚C) operating temperature
  • 150psig operating pressure
  • Up to 4000 FPM operating speed
  • 316 Stainless Steel hardware
  • Alloy C-276 springs
  • Face materials:
    • Carbon Graphite
    • Aluminum Oxide
    • PTFE
  • Elastomer materials:
    • Fluorocarbon (FKM)
  • ISO-3069-S, ASME B73.1, ASME B73.2

The Chesterton 440 External Single Component Mechanical Seal external design is used in general chemical applications where there are corrosives and other aggressive chemicals that attack standard seal materials and where special, high-cost alloys are required. No metal parts contact the process fluid.