一、Structures Characteristics And Usahe
This valve is a safety device mounted in the pipeline or pump outlet to prevent the pump from inversed running due to the differential water hammer’shock in the pipeline when the pump stops and features a brand-new structure，small volume，light weight，small fluid resisteance，reliable seal．stable open-close，long duration，better energy-saving effect．
Suitable for the pipeline related to water supply and drainage，fire-fighting，warming etc．Systems or the pump outlet to prevent both pump and pipeline from being damaged due to the water hammer produced when the medium flws back and form the silencing effect.
二、 Main Technique Number
| Nominal pressure |
1.0 |
1.6 |
| Test pressure (MPa) |
Shell strength |
1.5 |
2.4 |
| Sealing performance |
11 |
1.76 |
| Working temperatre |
≤ 80 |
| Applicable temperatre |
Clean-water、污水、Sea |
| Slow-close time |
0～60 |
三、 Material For Main Parts
| Name of part |
Body |
Disc |
Stem、oil oylinder 、 Oil cork |
Spring |
Beat |
| Material |
Cast-iron
Bowl-shaped steel |
Bowl-shaped steel、
Stainless steel |
Stainless steel |
Stainless steel |
NBR |
四、Main External And Connecting Dimensions
| Nominal diameter DN(mm) |
Nomin
al pressure DN(mm) |
L |
D |
D1 |
D2 |
b |
H |
H1 |
n-φd |
| 50 |
10/16 |
160 |
165 |
125 |
100 |
20 |
105 |
110 |
4-18 |
| 65 |
170 |
185 |
145 |
120 |
20 |
110 |
115 |
4-18 |
| 80 |
180 |
200 |
160 |
135 |
22 |
115 |
120 |
4-18/8-18 |
| 100 |
190 |
220 |
180 |
158 |
24 |
130 |
228 |
8-18 |
| 150 |
210 |
285 |
240 |
212 |
26 |
172 |
230 |
8-28 |
| 200 |
230 |
340 |
295 |
268 |
28 |
210 |
270 |
8-23/12-23 |
| 250 |
250 |
395/405 |
350/355 |
320 |
28/30 |
240 |
305 |
12-23/12-25 |
| 300 |
270 |
445/460 |
400/410 |
870 |
28/30 |
264 |
367 |
12-28/12-25 |
| 350 |
290 |
505/520 |
460/470 |
430 |
30/34 |
294 |
422 |
16-23/16-25 |
| 400 |
310 |
565/580 |
515/525 |
482 |
32/36 |
324 |
462 |
16-25/16-30 |
| 450 |
330 |
615/640 |
565/585 |
532 |
32/40 |
351 |
497 |
20-25/20-30 |
| 500 |
350 |
670/715 |
620/650 |
585 |
34/44 |
379 |
532 |
20-25/20-34 |
| 600 |
390 |
780/840 |
725/770 |
685 |
36/48 |
434 |
607 |
20-30/20-37 |
| 700 |
430 |
895/910 |
840 |
800 |
40/50 |
491 |
702 |
24-80/24-37 |
| 800 |
470 |
1015/1025 |
950 |
905 |
44/52 |
549 |
792 |
24-34/24-41 |
| 900 |
510 |
1115/1125 |
1050 |
1005 |
46/54 |
600 |
900 |
28-34/28-41 |
| 1000 |
550 |
1230/1255 |
1160/1170 |
1110 |
50/56 |
655 |
975 |
28-34/28-45 |
| 1200 |
630 |
1455/1485 |
1380/1390 |
1330 |
56/58 |
770 |
1140 |
32-41/32-51 |
|
