一、H71對夾雙瓣旋啟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 閥門全開啟時的流體阻力系數(shù)常溫下閥門全開啟時的水講E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 32 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 32 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 32 2.5 65 21/2 3.5 85.4 150 83.7 3 2 2.5 80 3 3.2 128 286 125 3 22.5 100 4 2.8 244 286 249 3 2 2.5 125 5 2.9 375 439 368 3 1 2.2 1506 3.1 522 611 512 3 1 2.2 200 8 3.2 915 1070 897 3 1 2.2二、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/T74-90GB9112-9124、HG20592-20614 PN1.0MPa H71H-10C H71W10P H71W10P8H71W10P3 H71W10R H71W10R8 H71W10R3 PN1.6MPa H71H-16C H71H-16PH71H-16P8 H71H-16P3 H71H-16R H71H-16R8 H71H-16R3 PN2.5MPa H71H-25H71H-25P H71H-25P8 H71H-25P3 H71H-25R H71H-25R8 H71H-25R3 PN4.0MPaH71H-40 H71H-40P H71H-40P8 H71H-40P3 H71H-40R H71H-40R8 H71H-40R3PN6.3MPa H71H-63 H71H-63P H71H-63P8 H71H-63P3 H71H-63R H71H-63R8H71H-63R3 PN10.0MPa H71H-100 H71H-100P H71H-100P8 H71H-100P3H71H-100R H71H-100R8 H71H-100R3 PN16.0MPa H71H-160 H71H-160PH71H-160P8 H71H-160P3 H71H-160R H71H-160R8 H71H-160R3CB/T9112-9124、HG20615-20635、SH3406 PN2.0MPa H71H-20C - H71H-20P8H71H-20P3 - H71H-20R8 H71H-20R3 PN5.0MPa H71H-50 - H71H-50P8H71H-50P3 - H71H-50R8 H71H-50R3 PN11.0MPa H71H-110 - H71H-110P8H71H-110P3 - H71H-110R8 H71H-110R3 PN15.0MPa H71H-150 - H71H-150P8H71H-150P3 - H71H-150R8 H71H-150R3 ANSIB16.5 Class150 H71H-A1C -H71H-A1CP8 H71H-A1P3 - H71H-A1R8 H71H-A1R3 Class300 H71H-A3 -H71H-A3P8 H71H-A3P3 - H71H-A3R8 H71H-A3R3 Class600 H71H-A6 -H71H-A6P8 H71H-A6P3 - H71H-A6R8 H71H-A6R3 Class900 H71H-A9 -H71H-A9P8 H71H-A9P3 - H71H-A9R8 H71H-A9R3   主要 零件  材料 閥體WCB(A105) ZG1Cr18Ni9Ti CF8(304) CF3(304L) ZG1Cr18Ni12Mo2TiCF8M(316) CF3M(316L) 閥瓣 2Cr13 1Cr18Ni9Ti 0Cr18Ni9 00Cr19Ni101Cr18Ni12TMo2i 00Cr17Ni12Mo2 00Cr17Ni14Mo2 壓圈 2Cr13 1Cr18Ni9Ti0Cr18Ni9 00Cr19Ni10 1Cr18Ni12TMo2i 00Cr17Ni12Mo2 00Cr17Ni14Mo2 彈簧0Cr18Ni9 0Cr18Ni9 0Cr18Ni9 00Cr19Ni10 1Cr18Ni12TMo2i 00Cr17Ni12Mo200Cr17Ni14Mo2 適用工況 適用介質(zhì) 水、蒸汽、  油品等 硝酸等腐蝕性介質(zhì) 強(qiáng)氧化性介質(zhì) 醋酸等腐蝕性介質(zhì)屎素等腐  蝕性介質(zhì) 適用溫度(℃) -29～425 -196～540 -196～425 -196～540 -196～455注：本表為常規(guī)對夾式止回閥的型號編制、主要零件材料及適用工況，其他要求及其型號編制參見對夾式止回閥型號編制方法。三、H71對夾升降式止回閥的主要尺寸及重量： 公稱壓力 PN  MPa 公稱通徑  DN  mm尺寸(mm) 重量  (Kg) 配管法蘭(供參考) L D D2 D3 D4 D5 螺栓孔中心  圓直徑Dl螺栓  數(shù)量 螺栓直徑d 螺栓  長度Ll PN1.0MPa PN1.6MPa 15 16 52 15 24 3140 0.12 65 4 M12 75 20 19 62 19 30 40 50 0.24 75 4 M12 90 25 22 7024 36 47 58 0.34 85 4 M12 90 32 28 83 31 46 56 68 0.53 100 4 M16100 40 31.5 93 39 55 66 78 0.80 110 4 M16 105 50 40 108 48 65 78 901.2 125 4 M16 125 65 46 128 62 80 95 110 1.8 145 4 M16 130 80 50142 76 96 110 125 2.2 160 8 M16 135 100 65 162 95 115 135 150 3.4180 8 M16 150 125 90 132 - 9.0 210 8 M16 8 127 150 158 - 14 240 8 M20 210 PN1.0MPa 200 200 208- 24 295 8 M20 240 PN1.6MPa 200 200 208 - 24 295 12 M20240 PN2.5MPa 15 16 52 15 24 31 40 0.12 65 4 M12 80 20 19 62 19 3040 50 0.24 75 4 M12 90 25 22 72 24 36 47 58 0.34 85 4 M12 90 32 2883 31 46 56 68 0.53 100 4 M16 110 40 31.5 93 39 55 66 78 0.80 110 4M16 115 50 40 108 48 65 78 90 1.2 125 4 M16 125 65 46 128 62 80 95110 1.8 145 8 M16 135 80 50 142 76 96 110 128 2.2 160 8 M16 95 115 135 150 3.8 190 8 M20 160 125 90 132 -9.2 220 8 M24 205 127 150 158 - 15 250 8 M24 225 200 200 208 - 26 310 12 M24 260 PN4.0MPa 15 16 52 15 24 3140 0.12 65 4 M12 80 20 19 62 19 30 40 50 0.24 75 4 M12 90 25 22 7224 36 47 58 0.34 85 4 M12 90 32 28 83 31 46 56 68 0.53 100 4 M16110 40 31.5 93 39 55 66 78 0.80 110 4 M16 115 50 40 108 48 65 78 901.2 125 4 M16 125 65 46 128 62 80 95 110 1.8 145 8 M16 135 80 50142 76 96 110 128 2.2 160 8 M16 145 100 60 168 95 115 135 150 3.8190 8 M20 160 125 90 132 - 9.2 220 8 M24 205 150 106224 127 150 158 - 15 250 8 M24 225 200 200 208 - 28320 12 M27