Fluid Power Journal

High Pressure Rotary Seal Assembly


Kalsi Engineering is pleased to announce the latest innovation in high pressure rotary sealing.  Our patented floating metal backup ring promotes maximum high-pressure seal performance by moving laterally to accommodate shaft runout and misalignment while providing the smallest possible extrusion gap clearance. The small clearance improves seal support, resulting in less pressure-related seal extrusion damage. The backup ring has a journal bearing type fit with the shaft. This fit defines the extrusion gap clearance for the rotary seal and aligns the backup ring on the shaft. The Kalsi brand rotary seal has hydrodynamic waves that pump a thin film of lubricant through the dynamic sealing interface during rotation. This rotationally driven pumping action reduces friction, wear, and seal generated heat, and lubricates the journal bearing interface between the backup ring and the shaft. The high pressure acts on equally sized sealed areas on both ends of the backup ring. This arrangement applies equal oppositely acting hydraulic forces to the backup ring, resulting in axial force balance. This leaves the backup ring free to move laterally to accommodate shaft misalignment, dynamic runout, and lateral deflection without risk of destructive heavily loaded metal to metal contact between the backup ring and the shaft. Contact us today to learn how our floating backup ring technology can increase the high-pressure performance of your rotary equipment.

For further information on the Kalsi Engineering floating backup ring or Kalsi Seal technologies, visit us at www.kalsi.com


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