500X泄压持压阀由主阀、泄压/持压导阀针阀、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，即可以作泄压阀用又可作持压阀用。作泄压阀用时，可维持供水路压力在设定的安全值之下；做持压阀用，可维持主阀上游水压在设定值之上，保持主阀上游供水压力。500X泄压/持压阀利用水力自力控制，不需要其它装置和能源，保养简便，一阀多用。500X泄压/持压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。1、作泄压阀：当泄压/持压导阀调整为泄压状态时，水通过针阀、主阀控制室、球阀A、泄压/持压导阀、球阀B流向出口，此时主阀处于开启状态。当进口压力超过泄压/持压导阀设定的安全值时，泄压导阀会自动开启，通过球阀C放出部分水，使管路泄压。当压力恢复到安全值时，泄压阀自动关闭。作泄压阀时，各球阀常开。2、作持压阀：当泄压/持压导阀调整为持压状态时，只要主阀进口水压低于导阀设定值，导阀即关闭。主要控制室升压，主阀关闭。3、当主阀上游供水压力超过导阀设定压力时，持压导阀才能打开，控制室的水经球阀排至出口，控制室降压主阀开启，开始供水，即保持了上游水压。作持压阀用时，球阀C常闭或用丝堵换下。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-ΦdmmmmmmmmmmmmPN1.0PN1.6PN2.5PN1.0PN1.6PN2.5PN1.0PN1.6PN2.5PN1.0PN1.6PN2.5201803301305504601161051051057575755858564-13.54-13.54-14251803301305504601161151151158585856868654-13.54-13.54-14321803301305504601161401401401001001007878764-17.54-17.54-18402403451356105161701501501501101101108888844-17.54-17.54-1850240345135610516170165165165125125125102102994-17.54-17.54-18652503551406255201801851851851451451451221221184-17.54-17.58-18802853601466455382102002002001601601601331331328-17.58-17.58-181003604001567505962752202202351801801901581581568-17.58-17.58-221254004201708086553102502502702102102201841841848-17.58-17.58-261504554351868647103552852853002402402502122122118-228-228-2620058548020611358054603403403602952953102682682748-2212-2212-26250650530226118585550039540542535035537032032033012-2212-2612-30300800575246132595558044546048540041043037037038912-2212-2616-30350860620275138599064050552055546047049043043044816-2216-2616-334009606352861445103071556558062051552555048248250316-2616-3016-364501075665320132590578061564067056558560053255054820-2620-3020-365001075695348143096083067071573062065066058558560920-2620-3320-3660012307203721565102092078084084572577077068568572020-3020-3620-3970016507704221755116098089591096084084087580080082024-3024-3624-42800175080545822301515105010151025108595095099090590592824-3324-3924-48)