一、结构及用途 Structure and purpose 该阀是通过电磁阀的导控实现准确的开启或关闭，用于泵的出口处，防止介质倒流的逆止控制阀，当泵即将停止供水前，阀门先行缓闭 90％ 左右，防止突然停泵而产生的水锤和水击声，当泵停止后，阀门再关闭，防止泵出现水的回流，有效地保护水泵，免受回流的冲击而产生反转，该阀有效防止水锤和水击声，密封可靠、动作平稳、使用寿命长。电磁阀可采用交流电220V或直流电24V。 Used at the pump outlet to carry out an accurate open or close via the pilot control of the solenoid valve and。as a check control valve，to prevent the medium from back-flow．When the pump is about to stop water supply，it is slowly closed by about 90％ first to prevent both water hammer and water shock noise from being produced due to sudden stop of the pump and．when the pump stops completely．it is fully closed t0 prevent the water from back flow with the pump so as to effectively protect it from counter movement due to the shock of the back-flow This valve can effectively prevent water hammer and wa-ter shock noise．be reliably sealed and long time used and stably move The solenoid valve can use either AC220V or DC24V power. 四、主要外形及连接尺寸 Schematic diagram of installation 公称通径 DN(mm) 20 25 32 40 50 65 80 100 125 150 200 250 300 350 400 450 500 600 700 800 L 180 180 180 203 203 216 241 292 330 356 495 622 698 787 914 978 978 1295 1446 1956 PN10 D 105 115 135 145 160 180 195 215 245 280 335 390 440 500 565 615 670 780 895 1010 D1 75 85 100 110 125 145 160 180 210 240 295 350 400 460 515 565 620 725 840 950 PN16 D 105 115 135 145 160 180 195 215 245 280 335 405 460 520 580 640 705 840 910 1020 D1 75 85 100 110 125 145 160 180 210 240 295 355 410 470 525 585 650 770 840 950 PN25 D 105 110 135 145 160 180 195 230 270 300 360 425 485 550 610 660 730 840 955 1070 D1 75 85 100 110 125 145 160 190 220 250 310 370 430 490 550 600 660 770 875 990 H 342 342 342 395 395 405 430 510 560 585 675 730 760 840 910 1030 1135 1270 1460 1640 H1 247 247 247 278 278 298 313 350 365 420 450 470 490 526 570 610 665 725 865 975 注：安装示意图中弹性座封闸阀或蝶阀任选，建议≥ DN350选蝶阀。 Note ： Either elastic seat ring sealed gate valve or butterfly valve can be selected in the schematic diagram of installation Recomended to select the butterfly valve in case of ≥ DN350