BM13 is Multi Spring Unbalance pusher type seals used for general Purpose and Universal application. Heavy cross sections of the rotary components resist high levels of corrosion, utilizing a simple rugged open rotary unit design. Their compact design permits their use in all types of rotating equipment, Centrifugal Pumps, Mixers, Agitators, and Compressor. This Design suitable for Aggressive, Abrasive, and viscous Liquids.