在幾十年的實(shí)踐運(yùn)營(yíng)中，公司始終堅(jiān)持以“積極進(jìn)取、保證質(zhì)理、信譽(yù)*、用戶*”的經(jīng)營(yíng)理念，以用戶滿意為Z終目標(biāo)。已形成了整套*的生產(chǎn)、經(jīng)營(yíng)管理體系，培養(yǎng)了一批高素質(zhì)，高水平，經(jīng)驗(yàn)豐富的專業(yè)工程技術(shù)人員。產(chǎn)品設(shè)計(jì)日臻完善，工藝水平不斷提高，與*水平同步行；公司采用CAD計(jì)算機(jī)輔助系統(tǒng)，吸收并優(yōu)化美國(guó)W-K-M、日本JSW公司技術(shù)，結(jié)合一整套現(xiàn)代化的檢測(cè)設(shè)備，嚴(yán)格執(zhí)行《產(chǎn)品質(zhì)量法》和（挪威）DNVISO9001國(guó)標(biāo)質(zhì)量標(biāo)準(zhǔn)體系，開發(fā)的產(chǎn)品多次獲得國(guó)家和閥門行業(yè)質(zhì)量信得過企業(yè)；國(guó)家特種設(shè)備制造許可（TS）和CE認(rèn)證已通過審核。【美標(biāo)對(duì)夾式止回閥,不銹鋼對(duì)夾式止回閥概述】
H71H(W)美標(biāo)對(duì)夾式止回閥由閥體、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、重量輕；
閥瓣關(guān)閉快速，水錘壓力小；流道通暢，流體阻力小；動(dòng)作靈敏，密封性能好。
【美標(biāo)對(duì)夾式止回閥結(jié)構(gòu)圖】
【美標(biāo)對(duì)夾式止回閥,不銹鋼對(duì)夾式止回閥號(hào)、材料及主要參數(shù)】
配管法蘭 | 公稱壓力 | 常規(guī)產(chǎn)品型號(hào) | ||||||
JB/T 74 | PN1.0MPa | H71H-10C | H71W-10P | H71W-10P8 | H71W-10P3 | H71W-10R | H71W-10R8 | H71W-10R3 |
PN1.6MPa | H71W-16C | H71W-16P | H71W-16P8 | H71W-16P3 | H71W-16R | H71W-16R8 | H71W-16R3 | |
PN2.5MPa | H71W-25 | H71W-25P | H71W-25P8 | H71W-25P3 | H71W-25R | H71W-25R8 | H71W-25R3 | |
PN4.0MPa | H71W-40 | H71W-40P | H71W-40P8 | H71W-40P3 | H71W-40R | H71W-40R8 | H71W-40R3 | |
PN6.3MPa | H71W-63 | H71W-63P | H71W-63P8 | H71W-63P3 | H71W-63R | H71W-63R8 | H71W-63R3 | |
PN10.0MPa | H71W-100 | H71W-100P | H71W-100P8 | H71W-100P3 | H71W-100R | H71W-100R8 | H71W-100R3 | |
PN16.0MPa | H71W-160 | H71W-160P | H71W-160P8 | H71W-160P3 | H71W-160R | H71W-160R8 | H71W-160R3 | |
GB/T 9112 | PN2.0MPa | H71H-20C | — | H71W-20P8 | H71W-20P3 | — | H71W-20R8 | H71W-20R3 |
PN5.0MPa | H71H-50 | — | H71W-50P8 | H71W-50P3 | — | H71W-50R8 | H71W-50R3 | |
PN11.0MPa | H71H-110 | — | H71W-110P8 | H71W-110P3 | — | H71W-110R8 | H71W-110R3 | |
PN15.0MPa | H71H-150 | — | H71W-150P8 | H71W-150P3 | — | H71W-150R8 | H71W-150R3 | |
ANSI B 16.5 | Class150 | H71H-A1C | — | H71W-A1P8 | H71W-A1P3 | — | H71W-A1R8 | H71W-A1R3 |
Class300 | H71H-A3 | — | H71W-A3P8 | H71W-A3P3 | — | H71W-A3R8 | H71W-A3R3 | |
Class600 | H71H-A6 | — | H71W-A6P8 | H71W-A6P3 | — | H71W-A6R8 | H71W-A6R3 | |
Class900 | H71H-A9 | — | H71W-A9P8 | H71W-A9P3 | — | H71W-A9R8 | H71W-A9R3 | |
主 要 | 閥體 | WCB(A105) | ZG1Cr18Ni9Ti | CF8(304) | CF3(304L) | ZG1Cr18Ni12Mo2Ti | CF8M(316) | CF3M(316L) |
閥瓣 | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni9 | 00Cr19Ni10 | 1Cr18Ni12Mo2Ti | 0Cr17Ni12Mo2 | 00Cr17Ni14Mo2 | |
壓圈 | 2Cr13 | 1Cr18Ni9Ti | 0Cr18Ni9 | 00Cr19Ni10 | 1Cr18Ni12Mo2Ti | 0Cr17Ni12Mo2 | 00Cr17Ni14Mo2 | |
彈簧 | 0Cr18Ni9 | 0Cr18Ni9 | 0Cr18Ni9 | 00Cr19Ni10 | 0Cr17Ni12Mo2 | 0Cr17Ni12Mo2 | 00Cr17Ni14Mo2 | |
適 用 | 適用介質(zhì) | 水、蒸汽、油品等 | 腐蝕性介質(zhì) | 強(qiáng)氧化性介質(zhì) | 腐蝕性介質(zhì) | 尿素等腐蝕性介質(zhì) | ||
適用溫度(℃) | -29~425 | -196~540 | -196~425 | -196~540 | -196~455 | |||
注：本表為常規(guī)對(duì)夾式止回閥的型號(hào)編制、主要零件材料及適用工況，其他要求及其型號(hào)編制參見對(duì)夾止回閥型號(hào)編制方法。 | ||||||||
【美標(biāo)對(duì)夾式止回閥主要連接尺寸】
壓力級(jí) | 口徑 | 尺寸(mm) | 重量 | 配管法蘭(供參考) | |||||||||
NPS | DN | L | D | D2 | D3 | D4 | 螺栓孔中心 | 螺栓 | 螺栓直徑d | 螺栓長(zhǎng) | |||
in | mm | ||||||||||||
Class | 1/2 | 15 | 16 | 46 | 15 | 25 | 25 | 0.28 | 60.5 | 4 | 1/2 | M14 | 75 |
3/4 | 20 | 19 | 56 | 19 | 30 | 30 | 0.42 | 70 | 4 | 1/2 | M14 | 90 | |
1 | 25 | 22 | 65 | 24 | 36 | 36 | 0.56 | 79.5 | 4 | 1/2 | M14 | 90 | |
11/4 | 32 | 28 | 74 | 31 | 43 | 43 | 0.75 | 89 | 4 | 1/2 | M14 | 100 | |
11/2 | 40 | 31.5 | 84 | 39 | 52 | 52 | 1.3 | 98.5 | 4 | 1/2 | M14 | 105 | |
2 | 50 | 40 | 103 | 48 | 62 | 62 | 2.1 | 120.5 | 4 | 5/8 | M16 | 125 | |
21/2 | 65 | 46 | 122 | 62 | 75 | 75 | 2.8 | 139.5 | 4 | 5/8 | M16 | 130 | |
3 | 80 | 50 | 135 | 76 | 90 | 90 | 3.6 | 152.5 | 4 | 5/8 | M16 | 135 | |
4 | 100 | 60 | 173 | 95 | 112 | 112 | 4.8 | 190.5 | 8 | 5/8 | M16 | 150 | |
5 | 125 | 90 | 195 | 110 | 125 | 132 | 12 | 216.0 | 8 | 3/4 | M20 | 180 | |
6 | 150 | 106 | 220 | 127 | 150 | 158 | 17 | 241.5 | 8 | 3/4 | M20 | 210 | |
8 | 200 | 140 | 277 | 165 | 200 | 208 | 29 | 298.5 | 8 | 3/4 | M20 | 240 | |
壓力級(jí) | 口徑 | 尺寸(mm) | 重量 | 配管法蘭(供參考) | ||||||||||
NPS | DN | L | D | D2 | D3 | D4 | 螺栓孔中心 | 螺栓 | 螺栓直徑d | 螺栓長(zhǎng) | ||||
in | mm | RF | RJ | |||||||||||
CLass | 1/2 | 15 | 25 | 46 | 15 | 25 | 25 | 0.28 | 60.5 | 4 | 1/2 | M14 | 90 | — |
3/4 | 20 | 31.5 | 56 | 19 | 30 | 30 | 0.42 | 70 | 4 | 1/2 | M14 | 100 | — | |
1 | 25 | 35.5 | 65 | 24 | 36 | 36 | 0.56 | 79.5 | 4 | 1/2 | M14 | 105 | 120 | |
11/4 | 32 | 40 | 74 | 31 | 43 | 43 | 0.75 | 89 | 4 | 1/2 | M14 | 115 | 130 | |
11/2 | 40 | 45 | 84 | 39 | 52 | 52 | 1.3 | 98.5 | 4 | 1/2 | M14 | 120 | 135 | |
2 | 50 | 56 | 103 | 48 | 62 | 62 | 2.1 | 120.5 | 4 | 5/8 | M16 | 140 | 155 | |
21/2 | 65 | 63 | 122 | 62 | 75 | 75 | 2.8 | 139.5 | 4 | 5/8 | M16 | 155 | 170 | |
3 | 80 | 71 | 135 | 76 | 90 | 90 | 3.6 | 152.5 | 4 | 5/8 | M16 | 165 | 180 | |
4 | 100 | 80 | 173 | 95 | 112 | 112 | 4.8 | 190.5 | 8 | 5/8 | M16 | 175 | 190 | |
5 | 125 | 110 | 195 | 110 | 125 | 132 | 12 | 216.0 | 8 | 3/4 | M20 | 210 | 225 | |
6 | 150 | 125 | 220 | 127 | 150 | 158 | 17 | 241.5 | 8 | 3/4 | M20 | 230 | 245 | |
8 | 200 | 160 | 277 | 165 | 200 | 208 | 29 | 298.5 | 8 | 3/4 | M20 | 270 | 285 | |
CLass | 1/2 | 15 | 25 | 52 | 15 | 25 | 25 | 0.3 | 66.5 | 4 | 1/2 | M14 | 95 | 105 |
3/4 | 20 | 31.5 | 65 | 19 | 30 | 30 | 0.46 | 82.5 | 4 | 5/8 | M16 | 110 | 125 | |
1 | 25 | 35.5 | 72 | 24 | 36 | 36 | 0.6 | 89 | 4 | 5/8 | M16 | 115 | 130 | |
11/4 | 32 | 40 | 81 | 31 | 43 | 43 | 0.8 | 98.5 | 4 | 5/8 | M16 | 125 | 140 | |
11/2 | 40 | 45 | 94 | 39 | 52 | 52 | 1.5 | 114.5 | 4 | 3/4 | M20 | 140 | 155 | |
2 | 50 | 56 | 110 | 48 | 62 | 62 | 2.4 | 127.0 | 8 | 5/8 | M16 | 145 | 170 | |
【流體阻力系數(shù)、流量系數(shù)及開啟壓力】
水的當(dāng)量體積流量Vw與實(shí)際流體的體積流量V按下式換算： 式中：Vw－水的當(dāng)量體積流量，1/S； ρ－流體密度，kg/m3； V－實(shí)際流體的體積流量，1/S。 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
流體力學(xué)性能·H71美標(biāo)對(duì)夾式止回閥的流體阻力系數(shù)
【美標(biāo)對(duì)夾式止回閥結(jié)構(gòu)特點(diǎn)】 1、結(jié)構(gòu)長(zhǎng)度短，其結(jié)構(gòu)長(zhǎng)度只有傳統(tǒng)法蘭止回閥的1/4~1/8 2、體積小、重量輕、其重量只有傳統(tǒng)法蘭止回閥的1/4~1/20 3、閥瓣關(guān)閉快速，水錘壓力小 4、水平管道使用，安裝方便 5、流道通暢、流體阻力小 6、動(dòng)作靈敏、密封性能好 7、閥瓣行程短、關(guān)閥沖擊力小 8、整體結(jié)構(gòu)、簡(jiǎn)單緊湊、造型美觀 9、使用壽命長(zhǎng)、可靠性高 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
