Patent ID: 8733399
Filing Date: 2014-05-27
Classification: F16K,Y10T

Abstract:
1. A flow adjusting valve in which a needle valve that adjusts the flow of liquid fluid and an open/close valve that makes it possible to fully close a flow path of the liquid fluid are accommodated inside a casing in which a fluid flow path and a valve seat are formed, wherein: the needle valve is provided with a reciprocating movement section that adjusts the flow of the liquid fluid that flows in the flow path by moving a needle valve piece toward and away from the valve seat and that is driven by a stepper motor; the open/close valve is provided with an opening/closing section driven by air pressure that utilizes a basal outer surface of the needle valve piece facing the valve seat as a fully-closing valve piece and that reciprocatingly moves the fully-closing valve piece, independently of the reciprocating movement section, between a closed position, where the fully-closing valve piece is in close contact with the valve seat, and an open position, where the fully-closing valve piece is moved away from the valve seat; the piston moves the fully closing valve piece to the flow path fully closed position of the open/close valve.