微阻缓闭止回阀HH44X结构特点：
HH44X微阻缓闭止回阀用于给排水管道，安装在是水泵出口处用来防止介质逆流和消除破环性水锤，并能有效地减少阀门关闭水锤压力，可保障安全运行，它具有阀瓣轻、开度大、节电*，流体阻力小，水锤消除机构设计新颖，密封性能稳定可靠、耐磨损、使用寿命长、运行平稳、无振动、无噪声等特点。
微阻缓闭止回阀主要零件材质如下：
零件名称 | 材质 |
阀体 | 铸铁、铸钢、不锈钢 |
阀盖 | 铸铁、铸钢、不锈钢 |
阀瓣 | 碳钢、不锈钢+橡胶 |
阀杆、活塞 | 不锈钢 |
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