通过Vlong认证 
标准规范：
设计制造标准：JB/T 8937
结构长度标准：GB/T 12221-2005
连接法兰标准：GB/T 9113
压力温度等级：GB/T 12224-2005
试验检验标准：GB/T 13927-2008
|
阀门全开启
时的流体阻 力系数ξ |
常温下阀门全开启时的水流量系数
|
流体的流向
|
|||||
|
DN
|
NPS
|
Kv(m3/h)
|
Cv(U.S)
|
Cv(U.K)
|
↑
|
→
|
|
|
开启压力近似值KPa
|
|||||||
|
50
|
2
|
2.6
|
63
|
74
|
62
|
2
|
1
|
|
65
|
21/2
|
2.4
|
109
|
128
|
107
|
2
|
1
|
|
80
|
3
|
2.3
|
172
|
201
|
169
|
2
|
1
|
|
100
|
4
|
2.0
|
289
|
338
|
283
|
2
|
1
|
|
125
|
5
|
1.8
|
476
|
557
|
466
|
2
|
1
|
|
150
|
6
|
1.5
|
750
|
878
|
735
|
2
|
1
|
|
200
|
8
|
1.3
|
1432
|
1675
|
1403
|
2
|
1
|
|
250
|
10
|
1.2
|
2330
|
2726
|
2283
|
2
|
1
|
|
300
|
12
|
1.0
|
3676
|
4301
|
3602
|
2
|
1
|
|
350
|
14
|
0.9
|
5274
|
6171
|
5169
|
2
|
1
|
|
400
|
16
|
0.8
|
7306
|
8548
|
7160
|
3
|
1
|
|
450
|
18
|
0.8
|
9246
|
10818
|
9061
|
3
|
1
|
|
500
|
20
|
0.8
|
11415
|
13356
|
11187
|
3
|
1
|
|
600
|
24
|
0.7
|
17573
|
20560
|
17222
|
3
|
1
|
|
700
|
28
|
0.7
|
23919
|
27985
|
23441
|
4
|
1
|
|
750
|
30
|
0.7
|
27458
|
32126
|
26909
|
4
|
1
|
|
800
|
32
|
0.7
|
31241
|
36552
|
30616
|
4
|
1
|
|
900
|
36
|
0.7
|
39539
|
46261
|
38748
|
4
|
1
|
|
1000
|
40
|
0.7
|
48814
|
57112
|
47838
|
4
|
1
|
|
1050
|
42
|
0.7
|
53817
|
62966
|
52741
|
4
|
1
|
|
1200
|
48
|
0.7
|
70292
|
82242
|
68886
|
4
|
1
|
