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.
These hydraulic pumps can be either fixed or variable displacement types. The pump body houses a rotating cylinder with pistons acting around its periphery. The pistons acts at angle to a thrust plate mounted on the shaft end. When the shaft rotates the pistons are reciprocated in turn relative to the pump body.