Magnetic Seal


These designs are generally used as bearing seals. The design uses magnetic materials rather than springs to keep the lapped seal faces together.

Applications are limited to non-corrosive fluids because of the magnets. There are some designs that have coated magnets to offer a limited amount of corrosion resistance.

Some people are reluctant to place magnets next to a bearing. They feel that magnets are better located in the oil sump of a pump where the can collect any loose metal particles that might be found in the oil.