不锈钢对夹式止回阀：
一、对夹式止回阀主要技术参数：
|
型号
|
公称压力PN(MPa)
|
试验压力PS(MPa)
|
工作温度(℃)
|
适用介质
|
|
|
壳体
|
密封
|
||||
|
H71W-16P
|
1.6
|
2.4
|
1.76
|
≤200
|
水、蒸体、油品等
|
|
H71H-25Q
|
2.5
|
3.75
|
2.75
|
≤235
|
|
|
H71W-25H
|
≤300
|
||||
|
H71W-25P
|
≤200
|
硝酸等腐蚀性介质
|
|||
|
H71W-40H
|
4.0
|
6.0
|
4.4
|
≤300
|
水、蒸体、油品等
|
|
H71W-40P
|
≤200
|
硝酸等腐蚀性介质
|
|||
|
DN
|
阀体
|
阀瓣
|
弹簧
|
|
H71W-25H、RH71W-40H
|
2Cr13
|
1Cr13
|
1Cr18 Ni9Ti
|
|
H71W-16P、RH71W-25P
|
ZG1Cr18 Ni9Ti
|
1Cr18 Ni9Ti
|
1Cr18 Ni9Ti
|
|
公称压力
MPa |
公称通径
DN |
尺寸（mm）
|
|||||
|
L
|
D1
|
D2
|
D3
|
D4
|
D5
|
||
|
PN1.0MPa
PN1.6MPa |
15
|
16
|
52
|
15
|
24
|
31
|
40
|
|
20
|
19
|
62
|
19
|
30
|
40
|
50
|
|
|
25
|
22
|
72
|
24
|
35
|
47
|
58
|
|
|
32
|
28
|
83
|
31
|
46
|
56
|
68
|
|
|
40
|
31.5
|
93
|
39
|
55
|
66
|
78
|
|
|
50
|
40
|
108
|
48
|
65
|
78
|
90
|
|
|
65
|
46
|
128
|
62
|
80
|
95
|
110
|
|
|
80
|
50
|
142
|
76
|
96
|
110
|
128
|
|
|
100
|
60
|
162
|
95
|
115
|
132
|
150
|
|
|
125
|
90
|
192
|
110
|
125
|
135
|
-
|
|
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