The bowl is a star-shaped, 6 spokesrotor. A nozzle is fitted at the end of each of the branches. A constant volume of water is (5.4 t hr^-1) discharged through the nozzles. The level of the interface is not set by gravity discs but by two inverted centrifugal pumps (fixed rotor and rotating liquid). One of these pumps supplies enough water to ensure full discharge of liquid through the nozzles dash – the diameter of which could vary from (2 to 2.3 mm).