不銹鋼對(duì)夾式止回閥-H71W/H不銹鋼對(duì)夾式止回閥主要功能水錘壓力很小,閥瓣行程短、閥瓣輕巧、具有彈簧輔助關(guān)閉、關(guān)閥速度很快。結(jié)構(gòu)長(zhǎng)度很短、體積很小、重量很輕、為閥門的安裝、搬運(yùn)、存放及管道的布置帶來很大的便利，并能大量節(jié)約材料、降低造價(jià)。
不銹鋼對(duì)夾式止回閥-H71W/H不銹鋼對(duì)夾式止回閥主要技術(shù)參數(shù)：
|
型號(hào)
|
公稱壓力PN(MPa)
|
試驗(yàn)壓力PS(MPa)
|
工作溫度(℃)
|
適用介質(zhì)
|
|
殼體
|
密封
|
|
H71W-16T
|
1.6
|
2.4
|
1.76
|
≤200
|
水、蒸體、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
|
水、蒸體、油品等
|
|
H71W-40P
|
≤200
|
硝酸等腐蝕性介質(zhì)
|
不銹鋼對(duì)夾式止回閥-H71W/H不銹鋼對(duì)夾式止回閥主要零件材料：
|
規(guī)格型號(hào)
|
閥體
|
閥瓣
|
彈簧
|
|
H71H-16Q、H71H-25Q
|
QT400-15
|
25
|
50CrCA
|
|
H71W-25H、H71W-40H
|
2Cr13
|
1Cr13
|
1Cr18Ni9Ti
|
|
H71W-16P、H71W-25P
|
ZG1Cr18Ni9Ti
|
1Cr18Ni9Ti
|
1Cr18Ni9Ti
|
流體力學(xué)性能：H71對(duì)夾升降式止回閥的流體阻力系數(shù)、流量系數(shù)及開啟壓力：
|
公稱通徑
|
閥門全開啟時(shí)的流體阻力系數(shù)
|
常溫下閥門全開啟時(shí)的水講E量系數(shù)
|
流體的流向
|
|
DN
|
NPS
|
Kvm3=／h
|
CVU.S
|
CVU.K
|
↑
|
↓
|
→
|
|
開啟壓力近似值KPa
|
|
15
|
1/2
|
6.4
|
2.6
|
3.0
|
2.5
|
3
|
2
|
2.5
|
|
20
|
3/4
|
5.1
|
6.4
|
7.5
|
6.3
|
3
|
2
|
2.5
|
|
25
|
4
|
4.1
|
12.6
|
14.8
|
12.3
|
3
|
2
|
2.5
|
|
32
|
11/4
|
4.1
|
19.7
|
23.1
|
19.3
|
3
|
2
|
2.5
|
|
40
|
11/2
|
3.8
|
29.5
|
63.9
|
28.9
|
3
|
2
|
2.5
|
|
50
|
2
|
3.5
|
54.6
|
99.9
|
63.5
|
3
|
2
|
2.5
|
|
65
|
21/2
|
3.5
|
85.4
|
150
|
83.7
|
3
|
2
|
2.5
|
|
80
|
3
|
3.2
|
128
|
286
|
125
|
3
|
2
|
2.5
|
|
100
|
4
|
2.8
|
244
|
286
|
249
|
3
|
2
|
2.5
|
|
125
|
5
|
2.9
|
375
|
439
|
368
|
3
|
1
|
2.2
|
|
150
|
6
|
3.1
|
522
|
611
|
512
|
3
|
1
|
2.2
|
|
200
|
8
|
3.2
|
915
|
1070
|
897
|
3
|
1
|
2.2
|
不銹鋼對(duì)夾式止回閥-H71W/H不銹鋼對(duì)夾式止回閥主要連接尺寸
|
公稱通徑DN
|
15
|
20
|
25
|
32
|
40
|
50
|
65
|
80
|
100
|
125
|
150
|
200
|
|
結(jié)構(gòu)長(zhǎng)度
|
長(zhǎng)系列
|
25
|
31.5
|
35.5
|
40
|
45
|
56
|
63
|
71
|
80
|
110
|
125
|
160
|
|
短系列
|
16
|
19
|
22
|
28
|
31.5
|
40
|
46
|
50
|
60
|
90
|
105
|
140
|
|
