品牌
生产厂家厂商性质
温州市所在地
缓闭式止回阀产品介绍:
300X缓闭止回阀是能够调控启闭速度的止回阀,在水泵启动或停止运行时,可配合现场调节至*开启或关闭速度。可用于高层建筑,减小水锤现象,以达到安全及安静的启闭效果。
缓闭式止回阀应用范围:
300X型缓闭止回阀产品广泛用于高层建筑、生活区等供水管网系统及城市供水工程。
公称压(Mpa) | 壳体试验压力(MPa) | 密封试验压力(MPa) | 适用介质 | 介质温度(℃) |
1.0 | 1.5 | 1.1 | 水 | 0-80 |
1.6 | 2.4 | 1.76 | ||
2.5 | 3.75 | 2.75 |
当阀门从进口端给水时,水通过微型过滤器、针型阀、单向阀进入主阀控制室,再经过球阀排水至下游。因为针型阀开度小于球阀开度,即主阀控制室的排水速度大于进水速度,因此控制室压力降低,作用于主阀盘下端的进口压力打开主阀向下游供水。
当管道停止供水时,若下游水开始回流,一部分回流水经球阀进入主控制室,由于单向阀作用,回流水不能从主控制室流出,引起主控制室逐渐升压,缓缓关闭主阀。
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