Symmetrical Seal Design: A Sealing Concept For Today
The symmetrical seal offers a significant advancement in seal design to pump manufacturers and users it is the first alternative design to complex seal arrangements which are required to fit a stuffing box designed for packing. Today, with more demands being made on tighter leakage control and simplified installation, the transition is being made from a conventional stuffing box to a self-contained package seal. The concept of a package seal is not new and dates back to the early days of the pipeline industry when they were supplied to seal split case pumps. What is new is the bolt-on feature of the symmetrical seal, freeing the seal design from the space required for packing. This freedom allows the seal manufacturers to include such sealing features like upstream pumping, when required.
Netzel, James P. (1984). Symmetrical Seal Design: A Sealing Concept For Today. Turbomachinery Laboratories, Department of Mechanical Engineering, Texas A&M University. Available electronically from