| 摘要 |
PROBLEM TO BE SOLVED: To provide a temperature relief valve with good responsiveness, which has a simple structure, is inexpensive, and is opened instantly at temperature rising, instead of using a temperature sensor comprising expensive wax thermo- elements. SOLUTION: In this temperature relief valve A in a hot-water supply facility, a connection opening 11 to a can body and an exhaust port 12 for flowing out hot water are arranged on the outer surface side of a body 1 forming a valve casing, a valve chest 10 for communicating the connection opening 11 to the exhaust port 12 is arranged in the body, a valve mechanism 2 which switches the communication between the connection opening 11 and the exhaust port 12 is incorporated in the valve chest 10, a spring 22 for energizing its valve element 21 onto the closing valve side is linked to the valve element, a retaining member 5 formed with metallic materials or resin materials, which melt or deform by water temperature rising in the can body over a regulated temperature, is held on the connection opening 11 through a supporting frame 4, and a closing valve condition is held by providing spring force, which presses the valve element 21 to a closing valve position by the spring 22, supported on this retaining member 5. |
