PRESSURE CONTROLLING VALVE

摘要

PROBLEM TO BE SOLVED: To reduce noises generated when a liquid such as fuel is discharged from the through hole of a valve sheet to a secondary side chamber. SOLUTION: The inner part of a casing 10 is divided into a primary side chamber 38 and a secondary side chamber 39 by means of a diaphragm 13 and a valve sheet 25. The valve sheet 25 is interposed at the central part of the diaphragm 13. A valve plug 27 is interposed at the position facing the through hole 35 of the valve sheet 25 in the primary side chamber 38. A valve for opening and closing the through hole 35 is composed of the valve sheet 25 and the valve plug 27. The valve is closed when the pressure of a liquid in the primary side chamber 38 is set pressure or below. The valve is opened when the pressure of the liquid in the primary side chamber 38 is the set pressure or more. A check valve 41 or a rubber lip is communicated with the outflow port 37 of the secondary side chamber 39.