Alcap principle

alpha laval design of centrifuge for dealing with high density residual fuels. It has a flow control disc and no need for gravity disc to be changed for varying density of fuel. Heating increases density differential, so water moves to the outer part of the bowl coz of centrifugal effect,
before water interface reaches disc stack a transducer via microchips causes the bowl to self sludge or water to be discharged to the drain valve.