1、體積小,重量輕,結(jié)構(gòu)緊湊、維修方便
2、閥板采用對(duì)偶式,在彈簧的彈性力下矩下可自行速閉
3、因速閉作用,可防止介質(zhì)倒流
4、閥體結(jié)構(gòu)長(zhǎng)度尺寸小,剛性好
5、安全方便,可用于水平垂直兩個(gè)方向安裝
1、法蘭連接尺寸:GB/T1724.1-98
2、結(jié)構(gòu)長(zhǎng)度:GB/T12221-1989,ISO5752-82
型號(hào) | 公稱通徑 | 試驗(yàn)壓力 | 工作溫度 | 適用溫度 | |
殼體 | 密封 | ||||
H71H-16Q | 1.6 | 2.4 | 1.76 | ≤235 | 水、蒸氣、油品等 |
H71H-25Q | 2.5 | 3.75 | 2.75 | ≤235 | |
H71W-25H | ≤300 | ||||
H71W-25P | ≤200 | 硝酸等腐蝕性介質(zhì) | |||
H71W-40H | 4.0 | 6.0 | 4.4 | ≤300 | |
H71W-40P | ≤200 | 水、蒸氣 |
型號(hào) | 閥門 | 閥瓣 | 彈簧 |
H71H-16Q |
QT400-15 | 25 | 50CrVA |
H71W-25H |
2Cr13 | 1Cr13 | 1Cr18Ni9 |
H71W-25P |
ZG1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
公稱通徑
|
閥門全開(kāi)啟
時(shí)的流體阻 力系數(shù)ξ |
常溫下閥門全開(kāi)啟時(shí)的水流量系數(shù)
|
流體的流向
|
||||
DN
|
NPS
|
Kv(m3/h)
|
Cv(U.S)
|
Cv(U.K)
|
↑
|
→
|
|
開(kāi)啟壓力近似值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
|
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