Abstract: An evaporator particularly useful for milk evaporation. The evaporator includes a rotor (12) within steam chamber (11) of housing (10). Liquid feed passes through conduit (13) to emit through outlets (14) and (15) onto the inner periphery of evaporator surfaces (16) and (17) of cone pairs (C, C1) and (C2). Concentrate can flow between cone pairs via tubes (22) at the other periphery of the cone pairs. Concentrate is picked up at cone pair (C2) and the lowermost cone pair (C1) to flow through outlet conduit (30). The cone angle of each cone is in the range of 5° to 45° preferably about 10°.