結(jié)構(gòu)及尺寸
該閥由閥體、閥瓣、彈簧等組成,水平或垂直安裝于管路系統(tǒng),防止介質(zhì)倒流,具有結(jié)構(gòu)短、體積小、質(zhì)量輕;閥瓣關(guān)閉快速,水錘壓力小;流道通暢,流體阻力小;動作靈敏,密封性能好。
H71對夾升降式止回閥的流體阻力系數(shù)、流量用開啟壓力
公稱通徑 閥門全開啟時(shí)的流體阻力系數(shù)ζ 常溫下閥門全開啟時(shí)的水流量系數(shù) 流體的流向
DN NPS Kv(m3/h) CV(U.S) CV(U.K) ↑ ↓ →
開啟壓力近似的值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 1 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 34.5 28.9 3 2 2.5
50 2 3.5 54.6 63.9 53.5 3 2 2.5
65 21/2 3.5 85.4 99.9 83.7 3 2 2.5
80 3 3.2 128 150 125 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
H71系列對夾升降式止回閥的型號、材料及主要參數(shù) 配管法蘭 公稱壓力 常規(guī)產(chǎn)品型號
JB/T74~90、GB/T9112~9124、HG20592~20614 PN1.0MPa H71H-10C H71W-10P H71W-10P8 H71W-10P3 H71W-10R H71W-10R8 H71W-10R3
PN1.6MPa H71H-16C H71W-16P H71W-16P8 H71W-16P3 H71W-16R H71W-16R8 H71W-16R3
PN2.5MPa H71H-25 H71W-25P H71W-25P8 H71W-25P3 H71W-25R H71W-25R8 H71W-25R3
PN4.0MPa H71H-40C H71W-40P H71W-40P8 H71W-40P3 H71W-40R H71W-40R8 H71W-40R3
PN6.3MPa H71H-63 H71W-63P H71W-63P8 H71W-63P3 H71W-63R H71W-63R8 H71W-63R3
PN10.0MPa H71H-100 H71W-100P H71W-100P8 H71W-100P3 H71W-100R H71W-100R8 H71W-100R3
PN16.0MPa H71H-160 H71W-160P H71W-160P8 H71W-160P3 H71W-160R H71W-160R8 H71W-160R3
GB/T9112~9124、HG20615~20635、SH3406 PN2.0MPa H71H-20C — H71W-20P8 H71W-20P3 — H71W-20R8 H71W-20R3
PN5.0MPa H71H-50 — H71W-50P8 H71W-50P3 — H71W-50R8 H71W-50R3
PN1
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