Kalsi Engineering offers a new class of extreme-pressure oil seals it created by combining wave-based rotationally driven interfacial lubrication, high-performance extrusion resistant plastics, and new manufacturing techniques and seal carrier designs.
In a 4.500 in. size, seals installed in floating seal carriers achieved hundreds of hours of operation with 10,000 psi (690 bar) at 120 to 175 rpm (141 to 206 sfpm) using an ISO 68 viscosity grade (VG) oil. Successful 4.500 in. feasibility testing has also occurred at 10,000 psi (690 bar) and 20 to 120 rpm (24 to 141 sfpm) with an ISO 48 VG oil.
In a 10.49 in. size, seals installed in conventional seal carriers achieved hundreds of hours of operation at 2,300 psi (159 bar) and 100 rpm (275 sfpm) with an ISO 220 VG oil. A 100-hour test was also conducted at 45 rpm (124 sfpm) with an ISO 68 VG oil and 353 rotational start/stop cycles under full pressure.
In the preceding tests, pressure was applied from the wave side. The BDRP version of these seals also has significant pressure capacity from the opposite side. In a 10.49 in. size, hundreds of hours of operation were achieved at 1,500 psi (103 bar) and 100 rpm (275 sfpm) with an ISO 320 VG oil. A 10.49 in. seal was also successfully tested at 1,000 psi (69 bar) and 170 rpm (467 sfpm) with an ISO 220 VG oil.
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