| 摘要 |
PURPOSE: A safety relief valve is provided to remove the back pressure created inside the bonnet and on the upper side of the disk when the disk is opened by over pressure because a side throttle valve is installed on a side of the body. CONSTITUTION: A safety relief valve comprises a center plate(200), a throttle(210) for releasing bonnet back pressure, a throttle(220) for releasing disk back pressure, a side throttle valve(230) for releasing bonnet back pressure, and a side throttle valve(240) for releasing disk back pressure. The center plate has a specified thickness, is assembled between the top of a body and the bottom of a bonnet, and is formed with a central shaft hole which a stem passes through. The throttle for releasing bonnet back pressure connects the inside of the bonnet to the outlet of the body. The throttle for releasing disk back pressure connects the upper space of a disk holder to the outlet of the body. The side throttle valve for releasing bonnet back pressure is driven from a side of the center plate to the throttle for releasing bonnet back pressure. The side throttle valve for releasing disk back pressure is driven from a side of the center plate to the throttle for releasing disk back pressure.
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