结构及用途 Structure and purpose
该阀主要安装于水池或水塔的进口处，当水位达到设定高度时，主阀由浮球导阀控制关闭进水口停止供水，当水位下降后，主阀由浮球导阀开关控制打开进水口向水池或水塔供水，实现自动补水。
该阀液位控制精度高，不受水压干扰，可任意安装位置，密封性能可靠，安装、维护、调试、检查方便、使用寿命长(浮球导阀可与主阀分离安装)。
Installed on the inlet of a water pool or tower．The main valve is controlled by the floating pilot valve to close the inlet to stop water supply when the water level gets to the set height and to open the inlet t0 supply water to the water tower or pool so as to realize the automatic water supplement when the water level lowers It features a high accuracy of level control．water pressure disturbance resisting。mountable on any positions，reliable seal performance,easy installation，maintenance，debugging and check，long duration(The floating pilot valve can be separately mounted from the main one)．
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 | 212 | 212 | 212 | 265 | 265 | 310 | 350 | 460 | 520 | 570 | 695 | 780 | 905 | 1025 | 1080 | 1030 | 1135 | 1270 | 1460 | 1640 | |
| H1 | 179 | 179 | 179 | 210 | 210 | 215 | 245 | 305 | 365 | 415 | 510 | 560 | 658 | 696 | 735 | 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.Recommended to select the butterfly valve in case of≥DN350.