EXCESSIVE PRESSURE RELIEF VALVE, AND RELIEF VALVE UNIT HAVING THE RELIEF VALVE

摘要

Provided is a small, simple-structured, homogeneous and mass-producible excessive pressure release valve which works even at a relatively low excessive pressure to surely and safely release the pressure to the external world. The excessive pressure release valve 1 has an elastic rubber plate 10 and a reversibly openable slit 11 that passes through the upper and the lower surfaces and release the pressure to the external world when the internal excessive pressure stressing on the lower side surface, pushes and opens the slit 11 toward upper surface side 12. The elastic rubber plate 10 is made of silicone rubber containing 1-20% by mass of silicone oil.