Multi Spring Revesed Balance Seals sare external mounted multi coil spring Seals. Liquid pressure is used to close the Seal faces therefore very effective in high pressure and vacuum applications.The unique feature of Pusher Type Reveresed Balanced Seals is that,it eleminated the shaft step or sleeves for balancing. It can be extremely useful for contaminated and light corrosive liquids as metal parts do not come in contact with media.