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本文介绍比例式减压阀的优点，工作原理。用于消防给水系统减压时，必须进行静动压计算后才能确定减压比，以及其设置和安装的注意事项
This article describes the advantages of proportional pressure relief valve, working principle. When decompressing the fire water supply system, static pressure must be calculated to determine the decompression ratio, and precautions for its installation and installation.