浙江瑞安永久机电厂生产的ZDF系列多功能电磁阀、ZZF系列组合电磁阀,集先导式电磁阀、手动截止阀、节流阀、止回阀于一体。以其很简单的结构和卓越的多项功能而成为当今世界电磁阀领域更新换代的重大发明的新一代理想节能产品,革除了沿用百余年的旁路隔离安装的复杂管路,在第15届日内瓦国际新技术展览会上荣获金质奖。组合、多功能电磁阀用于水、空气、蒸 Zhejiang Ruian permanent mechanical and electrical plant production ZDF series of multi-function solenoid valve, ZZF series of combination solenoid valve, set the pilot solenoid valve, manual cut-off valve, throttle, check valve in one. With its simple structure and multiple functions, it becomes a new generation of ideal energy-saving products that are major inventions in the field of solenoid valve replacement in the world today. It has eradicated complicated pipelines that have been installed with bypass isolation for more than one hundred years. In section 15 Geneva International New Technology Exhibition won the gold medal. Combination, multi-function solenoid valve for water, air, steam