Chamfered Enhanced Lubrication Seals were designed and successfully tested for rotary sealing applications where the pressure of an abrasive environment is higher than the pressure of the seal lubricant. Equipment such as lower pressure Rotating Control Devices (RCDs), and gear boxes in many types of equipment, operate under this condition.
Since introducing the seal last year, we have continued to characterize its performance through rotary testing in order to provide seal implementation guidance. The rotary tests performed on Type F Chamfered Enhanced Lubrication Seals are summarized in the table below.
Based on testing (see test #24 and #25 in the table), the Chamfered Enhanced Lubrication Seal is able to operate with the abrasive environment up to 500 psi higher than the seal lubricant at speeds up to 540 feet/minute.
The Chamfered Enhanced Lubrication Seal has a much lower hydrodynamic pumping related lubricant consumption, compared to several other Kalsi Seal geometries. In the test parameter range we have tested, the hydrodynamic pumping rate is not measurably influenced by differential pressure, speed, or lubricant viscosity. The maximum pumping rate recorded to date is 0.018ml/hour per seal wave.
This breakthrough rotary sealing technology eliminates the need for a lubricant overpressure system, and allows the Kalsi Seal to be used in equipment that has a simple gravity fed lubricator.
Gravity fed lubricator tests with Type F Chamfered Enhanced Lubrication Seals