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.
Suction and discharge ports of the pump are preferably on opposite sides of the vanes, which prevents the entrapment of gases. Rotary vane vacuum pumps can be used in a number of applications providing a pressure. or vacuum source for laboratory applications and as well as other automation applications.