Component PK Seal


PK Seal
  • Reliable, economical performance
  • Unitized construction means simple installation, no loose parts to inventory
  • Rubber bellows won't wear shaft or sleeve
  • Fits in shallow stuffing boxes
  • Won't clog in dirty environments
  • Flexible rotary face floats to compensate for misalignment


  • Centrifugal pumps
  • Gear boxes
  • Speed reducers
  • Other rotating equipment
Design Parameters
Minimum Shaft Diameter 0.500" (12.7 mm)
Maximum Shaft Diameter 3.000" (76.2 mm)
Pressure To 150 psi (10 bar)
Vacuum 28" (711 mm) Hg
Temperature To +400ºF (+204ºC)
Speed To 2,500 fpm (12.7 m/s)
Runout Consult
Axial motion Consult
Spring Configuration Single coil spring

Metal parts 316 stainless steel
Springs Stainless steel
Bellows Fluoroelastomer or nitrile
Faces Chemical grade carbon and ceramic; silicon carbide and tungsten carbide optional


PK Seal Dimensions

Click to enlarge
PK Chart

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Warning - Properties/applications shown throughout this Website are typical. Your specific application should not be undertaken without independent study and evaluation for suitability. For specific application recommendations, consult Beacon Gasket & Seals Co. Failure to select the proper sealing products could result in property damage and/or serious person injury. Performance data published in this Website has been developed from field testing, customer field reports and/or in-house testing. While the utmost care has been used in developing this Website, we assume no responsibility for errors. Specifications subject to change without notice.