POPPET VALVE WITH DIVERGING-CONVERGING FLOW PASSAGE AND METHOD TO REDUCE TOTAL PRESSURE LOSS

摘要

A poppet valve (50) is disclosed that include a valve body (11), a poppet guide (16) disposed inside the valve body (11) so as to form a flow passage from a flow inlet to a flow outlet of the valve (10), a poppet shutter (54) disposed inside the poppet guide (16), and a converging-diverging flow passage (68) formed by a portion of an outer surface of the poppet shutter (54) and a corresponding portion of an inner surface of valve body (11). A method for reducing a closing pressure force acting on a poppet shutter (54) of a poppet valve (50) is also disclosed.