結(jié)構(gòu)及用途 structure and purpose
該閥用于水泵出口控制水泵的實(shí)際工作揚(yáng)程 ,以限制水泵的工作流量,限制水泵電機(jī)負(fù)載,使水泵在較高效率狀態(tài)下工作,防止水泵電機(jī)在低揚(yáng)程、大流量、低效率時發(fā)生過載現(xiàn)象，防止超額定電流燒壞水泵電機(jī)現(xiàn)象發(fā)生，同時起到一定節(jié)能效果。安裝、維護(hù)、調(diào)試、檢查方便，使用壽命長，同時具有緩閉清聲止回閥功能。
This valve is used at a water pump＇s outlet to control the real working head of the pump so as to limit the working flow and the motor＇s load of it，make the pump working in a higher efficiency, prevent the motor from being overloaded in case if a low head，a big flow or a low efficiency and from being burnt due to an extra-rated cu r rent，with a certain energy saving effect Easy installation，maintenance，adjustment and check，long duration and of the function to be a slowly closed silencing check valve.
主要外形及連接尺寸 Schematic diagram of installation
| 公稱通徑 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 |
1448 |
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 |
480 |
490 |
550 |
600 |
660 |
770 |
875 |
990 |
| H |
172 |
172 |
172 |
265 |
265 |
310 |
350 |
460 |
520 |
570 |
695 |
780 |
905 |
1025 |
1080 |
1030 |
1135 |
1270 |
1460 |
1640 |
| H1 |
106 |
106 |
106 |
210 |
210 |
215 |
245 |
305 |
365 |
415 |
510 |
560 |
658 |
696 |
735 |
610 |
665 |
725 |
865 |
925 |
注：安裝示意圖中彈性座封閘閥或蝶閥任選，建議≥ DN350選蝶閥。
Note:Either elastic seat ring sealed gate valve or butterfly valve car be selected in the schematic diagram of installation.Recommended to select the butterfly valve un case of ≥ DN350
