Updated information on high pressure hydraulic swivels and enhanced lubrication seals

The Kalsi Engineering rotary seal handbook has been updated to revision level 21. The most significant revisions involve Chapter C5, “Enhanced Lubrication Kalsi Seals” and Chapter E2, “Using Kalsi Seals in hydraulic swivels”. Minor technical, editorial and/or cosmetic changes were also made to Chapters A2, A3, B1, and D8, and Appendices 2 and 4.

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