H71H/W-16/25Q/H/P 對(duì)夾升降式止回閥
H71H/W-16/25Q/H/P 對(duì)夾升降式止回閥外形尺寸圖
一、對(duì)夾升降式止回閥結(jié)構(gòu)特點(diǎn):
H71H/W-16/25Q/H/P對(duì)夾升降式直通止回閥具有結(jié)構(gòu)緊湊的特點(diǎn),由閥體、閥瓣及彈簧組成,采用對(duì)夾連接,由于對(duì)夾升降式直通止回閥的閥瓣的關(guān)閉行程短,具有彈簧預(yù)加載,避免產(chǎn)生水錘現(xiàn)象。H71H/W-16/25Q/H/P型對(duì)夾升降式直通止回閥已被廣泛使用于城建、工業(yè)及高層建筑的給水、排水管網(wǎng)管路上。
二、對(duì)夾升降式止回閥主要零件材料:
型號(hào) | 閥體 | 閥瓣 | 彈簧 |
H71H-16Q 、H71H-25Q | QT400-15 | 25 | 50CrVA |
H71W-25H、 H71W-40H | 2Cr13 | 1Cr13 | 1Cr18Ni9Ti |
H71W-25P 、H71W-40P | ZG1Cr18Ni9Ti | 1Cr18Ni9Ti | 1Cr18Ni9Ti |
三、對(duì)夾升降式止回閥主要技術(shù)參數(shù):
型號(hào) | 公稱壓力(MPa) | 試驗(yàn)壓力(MPa) | 適用溫度(℃) | 適用介質(zhì) | |
殼體 | 密封 | ||||
H71H-16Q | 1.6 | 2.4 | 1.76 | ≤235 | 水、蒸汽、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、蒸汽、油品等 |
H71W-40P | ≤200 | 硝酸等腐蝕性介質(zhì) |
四、對(duì)夾升降式止回閥主要外形尺寸:
型號(hào) | 公稱通徑 DN(mm) | L | D | ||
1.6 | 2.5 | 4.0 | |||
H71H-16Q H71H-25Q H71W-25H H71W-25P H71W-40H H71W-40P | 15 | 25 | 48 | 48 | 48 |
20 | 31.5 | 58 | 58 | 58 | |
25 | 35.5 | 68 | 68 | 68 | |
32 | 40 | 80 | 80 | 80 | |
40 | 45 | 90 | 90 | 90 | |
50 | 56 | 105 | 105 | 105 | |
65 | 63 | 125 | 125 | 125 | |
80 | 71 | 140 | 140 | 140 | |
100 | 80 | 160 | 165 | 165 | |
125 | 110 | 190 | 195 | 195 | |
150 | 125 | 215 | 225 | 225 | |
200 | 160 | 270 | 285 | 290 | |
250 | 200 | 330 | 340 | 350 | |
300 | 250 | 385 | 400 | 415 |
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