低温止回阀
端连接: ASME B16.5
试验: BS 6364/API 598
低温止回阀 概述
低温止回阀是指依靠介质本身流动而自动开、闭阀瓣，用来防止介质倒流的阀门。它属于一种自动阀门，其主要作用是防止介质倒流、还可用于超过系统压的辅助系统提供补给的管路上。
低温止回阀 尺寸范围
ANSI 150# 1/2"~ 30"
ANSI 300# 1/2”~ 30"
ANSI 600# 1/2" ~ 30"
ANSI 900# 3/4"~ 16"
ANSI 1500# 1/2" ~ 8"
ANSI 2500# 1/2”~ 6"
低温止回阀 结构特点
阀体为铸造一体式， 无外泄漏点，承受压力高，且刚性好便于维护;金属硬密封结构，密封面堆焊硬质合金，抗冲刷;阀瓣自密封结构，阀瓣与摇杆的配合面为球形面，能够产生微量转动提高密封面的吻合度保证密封性能;销轴内置结构，在阀体中腔处设置了一个凸台通过螺栓连接摇杆架形成内置销轴架，该结构避免了常规旋启式止回阀通常采用直接在阀体上打销轴孔用垫片和螺塞形成密封的结构形式，从根本上杜绝转轴结构引起的泄露，提高了阀门的可靠性;低压差开启结构;阀瓣多重防松结构:阀瓣采用锁紧螺母+锁紧垫片+开口销的多重防松结构，安全可靠。
低温止回阀 外形尺寸及参考数据
低温止回阀 主要连接尺寸CLASS 150
|
DN |
15 |
20 |
25 |
40 |
50 |
80 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
750 |
|
|
NPS |
1/2” |
3/4” |
1" |
1-1/2” |
2” |
3" |
4" |
6” |
8" |
10” |
12” |
14" |
16" |
18" |
20" |
24" |
30" |
|
|
L(BW) |
108 |
117 |
127 |
165 |
203 |
241 |
292 |
356 |
495 |
622 |
699 |
787 |
836.6 |
978 |
978 |
1295 |
1524 |
|
|
L(RF) |
108 |
117 |
127 |
165 |
203 |
241 |
292 |
356 |
495 |
622 |
699 |
787 |
836.6 |
978 |
978 |
1295 |
1524 |
|
|
D |
15 |
20 |
25 |
38 |
52 |
76 |
102 |
152 |
203 |
254 |
305 |
335 |
387 |
438 |
489 |
590 |
737 |
|
|
H |
105 |
108 |
112 |
126 |
143 |
186 |
210 |
247 |
304 |
331 |
410 |
459 |
499 |
552 |
572 |
670 |
800 |
|
|
weight |
BW |
7 |
10 |
10 |
11 |
13 |
20 |
32 |
61 |
115 |
200 |
270 |
420 |
520 |
595 |
735 |
1325 |
2240 |
|
(kg) |
RF |
11 |
11 |
12 |
14 |
18 |
28 |
45 |
70 |
130 |
230 |
330 |
460 |
580 |
660 |
810 |
1400 |
2330 |
CLASS 300
|
DN |
15 |
20 |
25 |
40 |
50 |
80 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
750 |
|
|
NPS |
1/2” |
3/4” |
1" |
1-1/2” |
2” |
3" |
4" |
6” |
8" |
10” |
12” |
14" |
16" |
18" |
20" |
24" |
30" |
|
|
L(BW) |
152 |
178 |
203 |
227 |
267 |
318 |
356 |
445 |
533 |
622 |
711 |
838 |
864 |
978 |
1016 |
1346 |
1594 |
|
|
L(RF) |
152 |
178 |
203 |
227 |
267 |
318 |
356 |
445 |
533 |
622 |
711 |
838 |
864 |
978 |
1016 |
1346 |
1594 |
|
|
D |
15 |
20 |
28 |
38 |
52 |
76 |
102 |
152 |
203 |
251 |
304 |
335 |
387 |
432 |
483 |
584 |
737 |
|
|
H |
105 |
108 |
112 |
134 |
152 |
184 |
222 |
275 |
328 |
392 |
451 |
487 |
552 |
591 |
622 |
721 |
860 |
|
|
weight |
BW |
10 |
10 |
11 |
12 |
18 |
30 |
40 |
95 |
150 |
265 |
330 |
530 |
730 |
1030 |
1130 |
1930 |
3005 |
|
(kg) |
RF |
12 |
12 |
12 |
13 |
25 |
45 |
60 |
125 |
220 |
320 |
445 |
610 |
570 |
1150 |
1250 |
2065 |
3150 |
CLASS 600
|
DN |
15 |
20 |
25 |
40 |
50 |
80 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
700 |
750 |
|
|
NPS |
1/2” |
3/4” |
1" |
1-1/2” |
2” |
3" |
4" |
6” |
8" |
10” |
12” |
14" |
16" |
18" |
20" |
24" |
28” |
30" |
|
|
L(BW) |
165 |
190 |
216 |
241 |
292 |
356 |
432 |
559 |
660 |
787 |
838 |
889 |
991 |
1092 |
1194 |
1397 |
1600 |
1651 |
|
|
L(RF) |
165 |
190 |
216 |
241 |
292 |
356 |
432 |
559 |
660 |
787 |
838 |
889 |
991 |
1092 |
1194 |
1397 |
1600 |
1651 |
|
|
D |
15 |
20 |
26 |
38 |
52 |
76 |
101 |
152 |
203 |
248 |
298 |
327 |
375 |
419 |
489 |
559 |
695 |
695 |
|
|
H |
13 |
118 |
122 |
136 |
198 |
217 |
279 |
366 |
424 |
522 |
564 |
593 |
624 |
705 |
784 |
839 |
1088 |
1088 |
|
|
weight |
BW
|
10 |
13 |
13 |
21 |
27 |
45 |
80 |
165 |
310 |
510 |
705 |
970 |
1358 |
1520 |
2350 |
2958 |
- |
5612 |
|
(kg)
|
RF |
14 |
14 |
17 |
25 |
30 |
60 |
105 |
205 |
335 |
625 |
832 |
1107 |
1498 |
1900 |
2700 |
3310 |
- |
5800 |
CLASS 900
|
DN |
20 |
25 |
40 |
50 |
80 |
100 |
150 |
200 |
250 |
300 |
350 |
400 |
|
|
NPS |
3/4” |
1" |
1-1/2” |
2” |
3" |
4" |
6” |
8" |
10” |
12” |
14" |
16" |
|
|
L(BW) |
229 |
254 |
305 |
368 |
381 |
457 |
610 |
737 |
838 |
965 |
1029 |
1130 |
|
|
L(RF) |
229 |
254 |
305 |
368 |
381 |
457 |
610 |
737 |
838 |
965 |
1029 |
1130 |
|
|
D |
18 |
25 |
35 |
50 |
78 |
102 |
147 |
191 |
238 |
283 |
311 |
356 |
|
|
H |
118 |
122 |
167 |
237 |
265 |
317 |
402 |
474 |
557 |
597 |
640 |
678 |
|
|
weight |
BW
|
20 |
26 |
35 |
64 |
80 |
125 |
240 |
465 |
752 |
1200 |
1400 |
1708 |
|
(kg)
|
RF |
25 |
30 |
40 |
75 |
95 |
160 |
300 |
498 |
868 |
1342 |
1700 |
2100 |
CLASS 1500
|
DN |
15 |
20 |
25 |
40 |
50 |
80 |
100 |
150 |
200 |
|
|
NPS |
1/2” |
3/4” |
1" |
1-1/2” |
2” |
3" |
4" |
6” |
8" |
|
|
L(BW) |
216 |
227 |
254 |
305 |
368 |
470 |
546 |
705 |
832 |
|
|
L(RF) |
216 |
5 |
254 |
305 |
368 |
470 |
546 |
705 |
832 |
|
|
D |
13 |
18 |
25 |
35 |
48 |
70 |
92 |
137 |
178 |
|
|
H |
113 |
118 |
122 |
167 |
237 |
296 |
342 |
469 |
553 |
|
|
weight |
BW
|
18 |
20 |
25 |
35 |
62 |
109 |
180 |
410 |
652 |
|
(kg)
|
RF |
25 |
25 |
30 |
40 |
75 |
128 |
225 |
508 |
900 |
CLASS 2500
|
DN |
15 |
20 |
25 |
40 |
50 |
80 |
100 |
150 |
|
|
NPS |
1/2” |
3/4” |
1" |
1-1/2” |
2” |
3" |
4" |
6” |
|
|
L(BW) |
264 |
273 |
308 |
384 |
451 |
578 |
673 |
914 |
|
|
L(RF) |
264 |
273 |
308 |
384 |
451 |
578 |
673 |
914 |
|
|
D |
11 |
15 |
19 |
34 |
52 |
57 |
73 |
111 |
|
|
H |
140 |
147 |
164 |
217 |
290 |
366 |
426 |
582 |
|
|
weight |
BW
|
25 |
38 |
48 |
57 |
90 |
200 |
310 |
525 |
|
(kg)
|
RF |
32 |
43 |
54 |
65 |
106 |
225 |
328 |
620 |
