DH44Y低溫止回閥是指閥體材質(zhì)是由LCB,LCC,LC1，LC2，LC3，LC4，LC8，CF8等各種低溫材質(zhì)鑄造加工成的止回閥，用于甲烷、液態(tài)天然氣、已烯、二氧化碳、液氨、液氧、液氮、液氫等低溫介質(zhì)。
DH44Y低溫止回閥主要性能規(guī)范:
|
型號
|
公稱壓力
|
常溫試驗壓力(MPa)
|
低溫試驗壓力(MPa)
|
工作溫度及適用介質(zhì)
|
|
殼體
|
密封(氣)
|
上密封
|
|
DH44Y-150Lb
|
150
|
3.0
|
0.6
|
2.2
|
0.6
|
-46℃氨液、氨、丙烷
|
-101℃乙烯、二氧化碳
|
-196℃甲烷、氮氣、液化天然氣
|
|
DH44Y-300Lb
|
300
|
7.5
|
0.6
|
5.5
|
0.6
|
|
DH44Y-600Lb
|
600
|
15.0
|
0.6
|
11.0
|
0.6
|
DH44Y低溫止回閥主要外形尺寸和連接尺寸:
|
公稱通徑
|
尺寸
|
|
mm
|
in
|
L
|
D
|
D1
|
D2
|
b
|
f
|
n-Φd
|
H
|
|
DH44Y-150Lb
|
|
50
|
2
|
203
|
152
|
120.5
|
92
|
16
|
1.6
|
4-19
|
180
|
|
80
|
3
|
241
|
192
|
152.5
|
127
|
19
|
1.6
|
4-19
|
190
|
|
100
|
4
|
297
|
229
|
190.5
|
157
|
24
|
1.6
|
8-19
|
203
|
|
125
|
5
|
330
|
254
|
216
|
186
|
24
|
1.6
|
8-22
|
229
|
|
150
|
6
|
356
|
279
|
241.5
|
216
|
26
|
1.6
|
8-22
|
257
|
|
200
|
8
|
495
|
342
|
298.5
|
270
|
29
|
1.6
|
8-22
|
292
|
|
250
|
10
|
622
|
406
|
362
|
324
|
31
|
1.6
|
12-25
|
355
|
|
300
|
12
|
698
|
483
|
432
|
381
|
32
|
1.6
|
12-25
|
396
|
|
DH44Y-300Lb
|
|
50
|
2
|
267
|
165
|
127
|
92
|
23
|
1.6
|
8-19
|
178
|
|
80
|
3
|
318
|
210
|
168.5
|
127
|
29
|
1.6
|
8-22
|
216
|
|
100
|
4
|
356
|
254
|
200
|
157
|
32
|
1.6
|
8-22
|
241
|
|
125
|
5
|
400
|
279
|
235
|
186
|
35
|
1.6
|
8-22
|
267
|
|
150
|
6
|
444
|
318
|
270
|
216
|
37
|
1.6
|
12-22
|
305
|
|
200
|
8
|
533
|
381
|
330
|
270
|
42
|
1.6
|
12-25
|
368
|
|
250
|
10
|
622
|
445
|
387
|
324
|
48
|
1.6
|
16-29
|
394
|
|
300
|
12
|
711
|
521
|
451
|
381
|
51
|
1.6
|
16-32
|
445
|
|
DH44Y-600Lb
|
|
50
|
2
|
295
|
165
|
127
|
92
|
33
|
6.4
|
8-19
|
203
|
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