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Single Spring Bellows with
Machined Head 


Features &


  • Machined head is standard to withstand more rigorous conditions

  • Bellows design enhances alignment capabilities and helps compensate for face wear

  • Bi-directional

  • Torque of pump shaft drives through machined drive band and notches

  • Rugged single spring minimizes clogging in stuffing box

  • 316 SS Standard Material to withstand wider variety of aggressive fluids

  • Multiple face and elastomer choices

  • All styles of set screw lock collars available to improve setting and drive reliability

  • Aflas bellows available for all sizes

Standard Materials of Construction


  • Carbon Graphite (Resin Impregnated), Antimony-Impregnated Carbon, Silicon Carbide, Tungsten Carbide


  • Buna, Viton®, Aflas®, Neoprene, EPDM


  • 304, 316, Monel

Operating Limits

  • Pressure: to 200 PSI, 13.8 Bar

  • Temperature: -40°F to +400°F, -40°C to +204°C

A1M drawing
A1M dimensions
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