Great training resource if you’re new to Mechanical Seals…lots covered in this five part Vulcan Seals PDF:
Part 1 – Basics of Mechanical Seals and Soft Packing
Part 2 – Mechanical Seal Materials
Part 3 – Mechanical Seal Failure Modes
Part 4 – Mechanical Seal General Types
Part 5 – Mechanical Seal Types Specific to Refrigeration Equipment