|
|||||||||||||||||||||||||||||
對(duì)夾升降式止回閥其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(lái)很大的便利，并能大量節(jié)約材料、降低造價(jià)。
對(duì)夾升降式止回閥主要技術(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 |
腐蝕性介質(zhì) |
|||
|
H71W-40H |
4.0 |
6.0 |
4.4 |
≤300 |
水、蒸體、油品等 |
|
H71W-40P |
≤200 |
腐蝕性介質(zhì) |
|||
對(duì)夾升降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(kāi)啟壓力：
|
公稱通徑 |
閥門全開(kāi)啟時(shí)的流體阻力系數(shù) |
常溫下閥門全開(kāi)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(kāi)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 |
上海祝富閥門有限公司—對(duì)夾升降式止回閥相關(guān)產(chǎn)品
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