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Welded Bellows Cartridge

Features & Benefits

  • Easy cartridge installation

  • Static "O" rings - No shaft fretting

  • Universal gland design conforms to most common bolt circles

  • Fits all ANSI pumps without modification

  • Self cleaning plates minimizes clogging

  • Face lubrication enhanced by even face loading

  • Balanced design - 300 PSI without modification

  • Fits into narrow cross section pumps

Standard Materials of Construction


  • Carbon, Tungsten Carbide, Silicon Carbide,
    Antimony Carbon


  • Viton*, Buna, PTFE, Neoprene, EPR, Kalrez*, FEP, AFLAS*, Teflon Jacketed Viton


  • 316 SS, Hastelloy C, AM 350, Titanium, Alloy 20

Operating Limits

  • Temperature: From -100° to 400° Fahrenheit*
    73° to 205º Celsius (depending upon elastomer)

  • Pressure: Up to 300 PSI / 20 Bar

S1WBC drawing
S1WBC gland plate drawing
S1WBC dimensions

*Registered Trademarks: Apex recognizes all trademark names as the property of their owners. 

Hastelloy® - Haynes / Viton® - DuPont / Kalrez® - DuPont / AFLAS® - ASHAI Glass / Chemraz® - Greene Tweed

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