| 摘要 |
A heat concentrating type self-operated automatic fire valve is characterized in that the first piston is provided on a top of the water inlet channel in the valve body, the piston cover is compressed on a circumferential periphery of the first piston; a pressurizing channel is provided on a center of the first piston; a first pressure relief channel is provided on a center or a circumferential periphery of the piston cover; the first pressure relief channel on the piston cover is communicated with the second pressure relief channel on the valve body; a magnetic pillar unit is sealedly provided on an upper portion of the valve core , and the second piston is provided on a lower portion of the valve core; a magnetic ring sleeve unit is sleeved on the valve-core sleeve, and a magnetic ring unit is provided in the magnetic ring sleeve unit.
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