产品介绍:
◆产品特点
止回阀是能自动阻止流体倒流的阀门.止回阀的阀瓣在流体压力作用下开启,流体从进口处流向出口处.当进口处压力低于出口处的压力时,阀瓣在流体压差本身重力等因素作用下自动关闭以防止流体倒流. ◆主要性能规格
结构长度:GB1221-89 法兰标准:JB79-59
◆主要外形尺寸和连接尺寸
公称通径 DN(mm) |
公称压力PN(MPa) |
L |
H |
D |
D1 |
D2 |
D6 |
b |
f |
f1 |
z-d |
25 |
1.6 2.5 |
160 |
- |
115 |
85 |
65 |
- |
16 |
- |
- |
4-14 |
32 |
180 |
- |
135 |
100 |
78 |
- |
18 |
- |
- |
4-18 |
40 |
200 |
- |
145 |
110 |
85 |
- |
18 |
- |
- |
4-18 |
50 |
230 |
177 |
160 |
125 |
100 |
- |
20 |
3 |
- |
4-18 |
65 |
290 |
192 |
180 |
145 |
120 |
- |
22 |
3 |
- |
8-18 |
80 |
310 |
192 |
195 |
160 |
135 |
- |
22 |
3 |
- |
8-18 |
100 |
350 |
217 |
230 |
190 |
160 |
- |
24 |
3 |
- |
8-23 |
125 |
400 |
250 |
270 |
220 |
188 |
- |
28 |
3 |
- |
8-25 |
150 |
480 |
270 |
300 |
250 |
218 |
- |
30 |
3 |
- |
8-25 |
200 |
550 |
350 |
360 |
310 |
278 |
- |
34 |
3 |
- |
12-25 |
250 |
650 |
410 |
425 |
370 |
332 |
- |
36 |
3 |
- |
12-30 |
300 |
750 |
430 |
485 |
430 |
390 |
- |
40 |
4 |
- |
16-30 |
350 |
850 |
450 |
550 |
490 |
448 |
- |
44 |
4 |
- |
16-34 |
400 |
950 |
560 |
610 |
550 |
505 |
- |
48 |
4 |
- |
16-34 |
500 |
1150 |
618 |
730 |
660 |
610 |
- |
52 |
4 |
- |
20-41 |
50 |
4.0 |
230 |
177 |
160 |
125 |
100 |
88 |
20 |
3 |
4 |
4-18 |
65 |
290 |
192 |
180 |
145 |
120 |
110 |
22 |
3 |
4 |
8-18 |
80 |
310 |
192 |
195 |
160 |
135 |
121 |
22 |
3 |
4 |
8-18 |
100 |
350 |
217 |
230 |
190 |
160 |
150 |
24 |
3 |
4.5 |
8-23 |
125 |
400 |
259 |
270 |
220 |
188 |
176 |
28 |
3 |
4.5 |
8-25 |
150 |
480 |
270 |
300 |
250 |
218 |
204 |
30 |
3 |
4.5 |
8-25 |
200 |
550 |
340 |
375 |
320 |
282 |
260 |
38 |
3 |
4.5 |
12-30 |
250 |
650 |
401 |
445 |
385 |
345 |
313 |
42 |
3 |
4.5 |
12-34 |
300 |
750 |
423 |
510 |
450 |
408 |
364 |
46 |
4 |
4.5 |
16-34 |
350 |
850 |
460 |
570 |
510 |
465 |
422 |
52 |
4 |
5 |
16-34 |
400 |
950 |
490 |
655 |
585 |
535 |
474 |
58 |
4 |
5 |
16-41 |
50 |
6.4 |
300 |
192 |
175 |
135 |
105 |
88 |
26 |
3 |
4 |
4-23 |
65 |
340 |
207 |
200 |
160 |
130 |
110 |
28 |
3 |
4 |
8-23 |
80 |
380 |
207 |
210 |
170 |
140 |
121 |
30 |
3 |
4 |
8-23 |
100 |
430 |
235 |
250 |
200 |
168 |
150 |
32 |
3 |
4.5 |
8-25 |
125 |
500 |
265 |
295 |
240 |
202 |
176 |
36 |
3 |
4.5 |
8-30 |
150 |
550 |
297 |
340 |
280 |
240 |
204 |
38 |
3 |
4.5 |
8-34 |
200 |
650 |
357 |
405 |
345 |
300 |
260 |
44 |
3 |
4.5 |
12-34 |
250 |
775 |
405 |
470 |
400 |
352 |
313 |
48 |
3 |
4.5 |
12-41 |
300 |
900 |
465 |
530 |
460 |
412 |
364 |
54 |
4 |
4.5 |
16-41 |
350 |
1025 |
514 |
595 |
525 |
475 |
422 |
60 |
4 |
5 |
16-41 |
400 |
1150 |
568 |
670 |
585 |
525 |
474 |
66 |
4 |
5 |
16-48 | |