产品编号：,51412573516,
产品名称：,500X泄压持压阀,
规　　格：,DN20-DN800,
产品备注：,型号：500X,
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　　　产品说明,
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一、概述：

500X泄压持压阀由主阀、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。做泄压阀用时,可维持供水路压力在设定的安全值之下,保持主阀上游供水压力。其工作原理,当导阀调整为泄压状态时,水通过针阀、主阀控制室、球阀A、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。当导阀调整为持压状态时,只要主阀进口水压底于导阀设定值,导阀即关闭。主要控制室升压,主阀关闭。当主阀上游供水压力超过导阀排至出口,控制室将压主阀开启,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。本产品利用水力自力控制,不需要其它装置和能源,保养简便,一阀多用。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。主要阀门零件材质如小表：

零件名称,材质,
阀体、阀盖,铸铁、铸钢、不锈钢,
阀座,锡青铜、不锈钢,
阀瓣,碳钢、不锈钢+丁腈橡胶,
阀杆,铝青钢、铬不锈钢,
膜片,丁腈橡胶,
膜片压板,碳钢、不锈钢,
弹簧,不锈钢,

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二、主要外形尺寸：
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公称通径,,,,,尺,,,,寸(mm),
,,DN(mm),,,,,L,,,,,A1,,,,,A,,,,,H1,,,,,H,
,,,,20,,,,,150,,,,,130,,,,,333,,,,,463,,,,,557,
,,,,25,,,,,160,,,,,130,,,,,333,,,,,463,,,,,557,
,,,,32,,,,,180,,,,,130,,,,,333,,,,,463,,,,,557,
,,,,40,,,,,200,,,,,140,,,,,343,,,,,516,,,,,610,
,,,,50,,,,,203,,,,,140,,,,,343,,,,,516,,,,,610,
,,,,65,,,,,216,,,,,140,,,,,355,,,,,520,,,,,625,
,,,,80,,,,,241,,,,,145,,,,,360,,,,,537,,,,,642,
,,,,100,,,,,270,,,,,155,,,,,400,,,,,596,,,,,750,
,,,,125,,,,300,,,,,165,,,,,420,,,,,653,,,,,808,
,,,,150,,,,,330,,,,,180,,,,,435,,,,,709,,,,,864,
,,,,200,,,,,400,,,,,205,,,,,480,,,,,805,,,,,1135,
,,,,250,,,,,480,,,,,225,,,,,530,,,,,855,,,,,1185,
,,,,300,,,,,550,,,,,245,,,,,575,,,,,953,,,,,1325,
,,,,350,,,,622,,,,,275,,,,,620,,,,,990,,,,,1385,
,,,,400,,,,,685,,,,,285,,,,,668,,,,,1030,,,,,1445,
,,,,450,,,,,750,,,,,285,,,,,668,,,,,1030,,,,,1445,
,,,,500,,,,,811,,,,,410,,,,,780,,,,,750,,,,,1110,
,,,,600,,,,,935,,,,,456,,,,,888,,,,,850,,,,,1286