Flow meter feedthrough FE132405

vacuumrotary

Cartridge mounted ferrofluid rotary feedthroughs can replace existing vacuum shafts or spindles which use dynamic o-ring seals (defined as o-ring seals which press against a moving surface). Dynamic o-ring seals frequently cause leaks in processes using vacuum in a manufacturing environment. To remedy this, replace the shaft having the dynamic seal and select a cartridge feedthrough with an OD that slips inside the seal “well” in the process vacuum wall. The static o-ring seals on the cartridge’s grooved outer surface do not move, making them far less likely to leak than dynamic o-ring seals. Ferrofluid Feedthrough Features Use a special magnetic fluid (ferrofluid) in place of an o-ring seal around dynamic parts Fluid hermetically seals the shaft making a liquid o-ring while a permanent magnet keeps the fluid in place Ferrofluid magnetically held in stages formed by grooves machined into either the shaft or pole pieces Unlike regular o-rings, the ferrofluid o-ring remains intact for years of operation despite the shaft’s motion