300X缓闭止回阀300X缓闭止回阀由主阀、单向阀、针阀、球阀、微形过滤器和压力表组成水力控制接管系统。利用水力自动操作，可使主阀得到最佳的开启或关闭速度。防止水锺水击的产生，以达到缓闭消声的效果。300X缓闭止回阀利用水力自力控制，不需要其它装置和能源，保养简便，开启及缓闭平稳。300X缓闭止回阀广泛用于高层建筑、生活区等供水管网系统及城市供水工程。当阀门从进口端给水时，水通过微型过滤器、针阀、单向阀进入主阀控制室，再经过球阀排水至下游。因为针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。主要技术参数公称压(Mpa)壳体试验压力(MPa)密封试验压力(MPa)适用介质介质温度(℃)1.01.51.1水0-801.62.41.762.53.752.75主要零件材料零件名称零件材料阀体阀盖WCB阀座阀盘铜合金密封圈O型圈丁腈橡胶阀杆2Cr13弹簧50CrVA针型阀铜合金球阀铜合金浮球阀铜合金微型过滤器不锈钢主要连接尺寸DNLAA1HH1FDmmD1mmD2mmn-ΦdmmmmmmmmmmmmPN1.0PN1.6PN2.5PN1.0PN1.6PN2.5PN1.0PN1.6PN2.5PN1.0PN1.6PN2.5201802822001721061161051051057575755858564-13.54-13.54-14251802822001721061161151151158585856868654-13.54-13.54-14321802822001721061161401401401001001007878764-17.54-17.54-18402403202102652101701501501501101101108888844-17.54-17.54-1850240320210265210170165165165125125125102102994-17.54-17.54-18652503302153102151801851851851451451451221221184-17.54-17.58-18802853502203502452102002002001601601601331331328-17.58-17.58-181003604102304603052752202202351801801901581581568-17.58-17.58-221254004202455203653102502502702102102201841841848-17.58-17.58-261504554302605704153552852853002402402502122122118-228-228-262005854402806955104603403403602952953102682682748-2212-2212-2625065045030078056050039540542535035537032032033012-2212-2612-3030080046032090265858044546048540041043037037038912-2212-2616-30350860470340102569664050552055546047049043043044816-2216-2616-33400960480360108073571556558062051552555048248250316-2616-3016-364501075530395103061078061564067056558560053255054820-2620-3020-365001075580420113566583067071573062065066058558560920-2620-3320-366001230600445127072592078084084572577077068568572020-3020-3620-397001650730495146086598089591096084084087580080082024-3024-3624-4280017508305301640925105010151025108595095099090590592824-3324-3924-48)