Cazuela de Vaca (Beef and Pumpkin Stew) This hearty Chilean stew of beef, corn, and pumpkin is a one dish meal. The main ingredients are stewed in serving-sized pieces, so that each person receives a large piece surrounded by a broth with the other vegetables.
Quick Answer. A rotary vane vacuum pump works by using centrifugal force to turn blades against the circular surface of a cylinder whereby pockets of air are pushed from an inlet port to an outlet port as air pressure increases.
Vaporization of the liquid within the pump caused by a loss of suction head or an increase in suction temperature. Vane passing syndrome caused by too small an impeller to cut water clearance. Air ingestion on the suction side of the pump, which allows air and bubbles into the suction of the pump.