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.
All pressure washer pumps are in the reciprocating group and use pistons or plungers to add energy to the water. There are 2 main differences between the piston and plunger pump. 1  The piston pump has the cylinder seal attached to the piston so it moves with it on each stroke.