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Single Spring Elastomer Bellows Seal | A21

Single Spring Elastomer Bellows Seal | A21

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Features & Benefits

  • Cost-effective seal common to many process pumps
  • Bellows design helps compensate for face wear
  • Bi-directional
  • Multiple face and elastomer choices
  • Equivalent to John Crane Type 21, Pac-Seal Type 21, US Seal C head

Standard Materials of Construction

  • Faces: Carbon Graphite (Resin Impregnated), Antimony-Impregnated Carbon, Silicon Carbide, Tungsten Carbide
  • Elastomers: Buna, Viton®, Aflas®, Neoprene, EPDM
  • Metallurgy: 304, 316, Monel

Operating Limits

  • Pressure: Up to 150 PSI / 10.3 Bar
  • Temperature: -40°F to +400°F
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