FLUX PUMP F55G HIGH VISCOSITY (also known as F550G) TUBE SET (less motor): Flux Pump F55G (aka F550G) Tube Sets are for use on fluids with viscosities up to 100,000 cps. This worm type, or progressive cavity type pump incorporates a heavy-duty metal rotor and elastomer stator to pump thick fluids. The pumping action is very gentle to the fluid unlike a centrifugal impeller. Pump can be stripped down in a few minutes. A mechanical seal is used so the pump can not run dry. Simple robust design means fewer parts providing easier cleaning and greater reliability.