The subject innovation is to provide a complete seed Ealing (Sealing) also has the effect as well as a safety valve allows the pressure occurrence to stably discharge them in a device for a liquid or gas. The present invention is to this from the gas or liquid flowing in the pipe and pressure to form a teller as to flow thereof is generated, and the inside is engaged with the valve housing has a valve body forming a valve chamber which communicate with a teller, the as the contact with the teller to the side of the inlet of the valve body and has an outer peripheral wall is provided with a valve seat (Seat) formed in the annular groove portion is integral to receive the ring, the valve the left and face-to-face positioning elastically as the valve rod grooves for coupling presented forms of the valve plate to open so contact the valve seat and the teller to or close, larger diameter than the valve plate on both sides, the flow of valve stem end and a valve plate to apply a biasing pressure against the valve plate, respectively and having a valve assembly formed by the supporting holder, the opposite side of said valve assembly and an artificial valve stem coupling the valve body It will have installed a security emergency opening device as a handle to facilitate manipulation of the lever and the lever for moving the enemy. As a result there is a full and seed Ealing effect of the valve seat, the effect was eliminated and the effective removal of the abnormal operation factors of the valve body, the vibration factors can interfere with the flow of the pressure liquid or gas in the valve body.