结构长度:GB12221-89
法兰标准:JB79
旋启式止回阀又称单向阀或逆止阀,其作用是防止管路中的介质倒流。启闭件靠介质流动和力量自行开启或关闭,以防止介质倒流的阀门叫止回阀。止回阀属于自动阀类,主要用于介质单向流动的管道上,只允许介质向一个方向流动,以防止发生事故。本类阀门在管道中一般应当水平安装。
主要性能规范:
试验压力(MPa) |
公称压力PN(Mpa) |
2.5 |
4.0 |
6.4 |
10.0 |
16 |
20 |
25 |
壳体强度试验 |
3.75 |
6.0 |
9.6 |
15.0 |
24 |
30 |
38 |
密封试验(液) |
2.75 |
4.4 |
7.0 |
11.0 |
17.6 |
22 |
27.5 |
密封试验(气) |
0.5~0.7 |
试用介质A |
C |
P |
R |
I |
水、油品、蒸汽 |
硝酸类 |
醋酸类 |
空气、水 |
使用温度(℃) |
<425 |
<200 |
<200 |
≤550 |
尺寸图纸:
主要外形尺寸和连接尺寸(mm):
公称通径DN(mm) |
公称压力PN(Mpa) |
L |
H |
D |
D1 |
D2 |
D6 |
b |
f |
f2 |
z-d |
50 |
2.5 |
230 |
160 |
160 |
125 |
100 |
|
20 |
3 |
|
4-18 |
65 |
290 |
175 |
180 |
145 |
120 |
|
22 |
3 |
|
8-18 |
80 |
310 |
185 |
195 |
160 |
135 |
|
22 |
3 |
|
8-18 |
100 |
350 |
220 |
230 |
190 |
160 |
|
24 |
3 |
|
8-23 |
125 |
400 |
248 |
270 |
220 |
188 |
|
28 |
3 |
|
8-25 |
150 |
480 |
276 |
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 |
518 |
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 |
169 |
160 |
125 |
100 |
88 |
20 |
3 |
4 |
4-18 |
65 |
290 |
173 |
180 |
145 |
120 |
110 |
22 |
3 |
4 |
8-18 |
80 |
310 |
185 |
195 |
160 |
135 |
121 |
22 |
3 |
4 |
8-18 |
100 |
350 |
220 |
230 |
190 |
160 |
150 |
24 |
3 |
4.5 |
8-23 |
125 |
400 |
248 |
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 |
342 |
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 |
455 |
570 |
510 |
465 |
422 |
52 |
4 |
5 |
16-34 |
400 |
950 |
510 |
655 |
585 |
535 |
474 |
58 |
4 |
5 |
16-41 |
50 |
6.4 |
300 |
177 |
175 |
135 |
105 |
88 |
26 |
3 |
4 |
4-23 |
65 |
340 |
197 |
200 |
160 |
130 |
110 |
28 |
3 |
4 |
8-23 |
80 |
380 |
212 |
210 |
170 |
140 |
121 |
30 |
3 |
4 |
8-23 |
100 |
430 |
248 |
250 |
200 |
168 |
150 |
32 |
3 |
4.5 |
8-25 |
125 |
500 |
296 |
295 |
240 |
202 |
176 |
36 |
3 |
4.5 |
8-30 |
150 |
550 |
330 |
340 |
280 |
240 |
204 |
38 |
3 |
4.5 |
8-34 |
200 |
650 |
385 |
405 |
345 |
300 |
260 |
44 |
3 |
4.5 |
12-34 |
250 |
775 |
445 |
470 |
400 |
352 |
313 |
48 |
3 |
4.5 |
12-41 |
300 |
900 |
474 |
530 |
460 |
412 |
364 |
54 |
4 |
4.5 |
16-41 |
350 |
1025 |
514 |
595 |
525 |
475 |
422 |
60 |
4 |
5 |
16-41 |
400 |
1150 |
616 |
670 |
585 |
525 |
474 |
66 |
4 |
5 |
16-48 |
50 |
10.0 |
300 |
210 |
195 |
145 |
112 |
88 |
28 |
3 |
4 |
4-25 |
65 |
340 |
227 |
220 |
170 |
138 |
110 |
32 |
3 |
4 |
8-25 |
80 |
380 |
235 |
230 |
180 |
148 |
121 |
34 |
3 |
4 |
8-25 |
100 |
430 |
274 |
265 |
210 |
172 |
150 |
38 |
3 |
4.5 |
8-30 |
125 |
500 |
307 |
310 |
250 |
210 |
176 |
42 |
3 |
4.5 |
8-34 |
150 |
550 |
347 |
350 |
290 |
250 |
204 |
46 |
3 |
4.5 |
12-34 |
200 |
650 |
402 |
430 |
360 |
312 |
260 |
54 |
3 |
4.5 |
12-41 |
250 |
775 |
432 |
500 |
430 |
382 |
313 |
60 |
3 |
4.5 |
12-41 |
300 |
900 |
484 |
585 |
500 |
442 |
364 |
70 |
4 |
4.5 |
16-48 |
50 |
16.0 |
300 |
210 |
215 |
165 |
132 |
188 |
36 |
3 |
4 |
8-25 |
65 |
340 |
227 |
245 |
190 |
152 |
110 |
44 |
3 |
4 |
8-30 |
80 |
380 |
235 |
260 |
205 |
168 |
121 |
46 |
3 |
4.5 |
8-30 |
100 |
430 |
274 |
300 |
240 |
200 |
150 |
48 |
3 |
4.5 |
8-34 |
150 |
550 |
340 |
390 |
318 |
270 |
205 |
66 |
3 |
4.5 |
12-41 |
200 |
650 |
374 |
480 |
400 |
345 |
250 |
78 |
3 |
4.5 |
12-48 |
250 |
775 |
440 |
580 |
485 |
425 |
313 |
88 |
3 |
4.5 |
12-54 |
300 |
900 |
505 |
665 |
570 |
510 |
364 |
100 |
3 |
4.5 |
16-54 |
H44H(Y、W)-200 |
公称通径
DN(mm)
|
尺寸(mm)(JB79) |
L |
D |
D1 |
D2 |
D6 |
b |
f |
Z-φd |
H |
50 |
300 |
210 |
160 |
128 |
70 |
40 |
3 |
8-φ25 |
120 |
65 |
340 |
260 |
203 |
165 |
97 |
48 |
3 |
8-φ30 |
190 |
80 |
380 |
290 |
230 |
190 |
116 |
54 |
3 |
8-φ34 |
210 |
100 |
430 |
360 |
292 |
245 |
138 |
66 |
3 |
8-φ41 |
240 |
150 |
550 |
440 |
360 |
305 |
190 |
82 |
3 |
12-φ48 |
343 |
200 |
650 |
535 |
440 |
380 |
245 |
92 |
3 |
12-φ48 |
320 |
250 |
775 |
670 |
572 |
508 |
319 |
110 |
3 |
16-φ48 |
380 |
H44H(Y、W)-250 |
公称通径 DN(mm)
|
尺寸(mm)(GB9113.25) |
L |
D |
D1 |
D2 |
D8 |
b |
b4 |
f |
f3 |
Z-d |
H |
50 |
300 |
215 |
165 |
124 |
95 |
38 |
12 |
8 |
8 |
8-φ26 |
220 |
65 |
340 |
245 |
190 |
137 |
108 |
41 |
12 |
8 |
8 |
8-φ30 |
230 |
80 |
380 |
270 |
203 |
168 |
137 |
48 |
12 |
8 |
8 |
8-φ33 |
245 |
100 |
430 |
310 |
241 |
194 |
162 |
54 |
12 |
8 |
8 |
8-φ36 |
280 |
150 |
550 |
395 |
318 |
248 |
211 |
83 |
13 |
9.5 |
9.5 |
12-φ39 |
340 |
200 |
650 |
485 |
394 |
318 |
270 |
92 |
17 |
11 |
11 |
12-φ45 |
360 |
250 |
775 |
585 |
483 |
371 |
324 |
108 |
17 |
11 |
11 |
12-φ52 |
395 |
300 |
900 |
675 |
571 |
438 |
381 |
124 |
23 |
14 |
14 |
16-φ56 |
478 |