Patent ID: 8052119

Claim:
A valve device comprising: a valve housing that defines a cylindrical space connected to a high-pressure source, and that has a first communication hole that is open at a valve seat located at a bottom portion of the valve housing and that provides fluid communication between the cylindrical space and a low-pressure source; a seal member that is arranged in the cylindrical space and that provides or shuts off fluid communication between the high-pressure source and the low-pressure source such that the seal member moves away from or contacts the valve seat; and a stem that has an accommodating recess formed at one end of the stem and that moves in an axial direction of the stem, wherein the seal member is fitted and held in the accommodating recess, and wherein the seal member has a second communication hole that provides fluid communication between a bottom face of the accommodating recess and the low-pressure source when the seal member is in contact with the valve seat.