PRESSURE REGULATOR

摘要

A pressure regulator that has a relatively simple and highly reliable structure, in which a pressure regulation mechanism is not damaged by an excessive primary pressure of a pressurized fluid and which can singly protect the pressure regulation mechanism. The pressure regulator (1) has a housing (5) and the pressure regulation mechanism. The housing (5) has an inlet hole (76) through which the pressurized fluid having the primary pressure is delivered, a discharge hole (38) through which the pressurized fluid having a secondary pressure, which is a reduced pressure, is discharged, and a flow path that is formed inside the housing (5) and runs from the inlet hole (76) up to the discharge hole (38). The pressure regulation mechanism is placed in the middle of the flow path and reduces the primary pressure to the secondary pressure. The pressure regulation mechanism has a moving body including a diaphragm (12) displaced according to a variation in the pressure of the fluid. The moving body has a contact section (14b) coming into contact, when the primary pressure is excessive, with a part of the housing (5) to prevent excessive displacement of the moving body.