Multiple-flow liquid ring pump

A multiple-flow liquid ring pump (1) comprising

• a) a rotor housing (2) which encompasses a rotor disposed in a working area and two end faces;
• b) side shields (3, 4) disposed on both end faces,
• i) each side shield (3, 4), on the side turned towards the other side shield, having an inlet opening (7, 9) and an outlet opening (8, 10) which are interconnected,
• ii) a suction port being provided for a supply line and a pressure port for a delivery line,
• iii) and each side shield having at least one further connecting port (11, 12, 13, 14);
• c) the outer jacket surface of each side shield (3, 4) being flush with the outer jacket surface of the rotor housing (2);
• and
• d) the connection of the inlet (7, 9) and outlet opening (8, 10) as well as of the connecting port (11, 12, 13, 14) taking place via channels (15, 16, 30, 31) disposed in the rotor housing (2);
• characterized in that
• e) the rotor housing (2) has a substantially rectangular cross section;
• f) the working area has a round cross section and is disposed substantially centric of the rotor housing (2);
• and
• g) the channels (15, 16, 30, 31) are disposed in crotches in the rotor housing (2) which ensue from the round working area.