美標波紋管法蘭截止閥 |
產(chǎn)品型號:WAJ41 |
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Bb Os & Y型結(jié)構(gòu) | 制造標準:AP1600 | 結(jié)構(gòu)長度:ANSI B16.10 | 法蘭標準:ANSI B16.25 | 對焊口標準:ANSI B16.25 | 試驗標準:AP1598 | | Bb Os & Y structure | Manufacture:AP1600 | Face to face:ANSI B16.10 | Flange:ANSI B16.25 | Butt-welding:ANSI B16.25 | Test:AP1598 | | 公稱壓力 (nominal pressure) | 150LB | 300LB | 600LB | 密封試驗(seal test) | 2.2MPa | 5.5MPa | 11.0MPa | 殼體強度(shell) | 3.0MPa | 7.5MPa | 15.0MPa | 適用溫度 (suitabletemprature) | 300℃ | |
特點(features): 雙層波紋管(double walls bellow seal) | 維修方便(maintenance-free) | 波紋管密封閥桿(spindle with bellow seal) | 雙重密封(secondary sealing) | 位置指示(position indicator) | 無升降手輪(non-rising handwheel) | |
用途(selection of possible applications): 工業(yè)(industry) | 電站(power station) | 廢氣凈化廠(flue gas puerification plant) | 天然氣(gas supply) | 真空裝置(vacuum facilities) | 氨(ammonia) | 熱水(hot water) | 冷凍系統(tǒng)(cllling&freezing systme) | 加熱設(shè)備(heating technology) | 蒸汽系統(tǒng)(steam system) | 零件名稱 parta name | 閥體 body | 閥蓋 bonnet | 閥桿 stem | 閥瓣 disc | 密封面 sealing face | 填料 paking | WCB | WCB | WCB | 13Cr | Cr13 | Cr13 | 柔性石墨 GRAPHITE | STL | 304 | CF8 | CF8 | 304 | 304 | 304 | 柔性石墨 GRAPHITE | STL | PTFE | 316 | CF8M | CF8M | 316 | 316 | 316 | 柔性石墨 GRAPHITE | STL | PTFE | 304L | CF3 | CF3 | 316 | 304L | 304L | 柔性石墨 GRAPHITE | STL | PTFE | 316L | CF3M | CF3M | 316 | 316L | 316L | 柔性石墨 GRAPHITE | STL | PTFE | |
外形尺寸各連接尺寸 external and connection dimensions: PN | DN | L | L1 | D | D1 | D2 | B | f | H | NPT | N-ф | △H (STRODE) | 150LB | 1/2" | 108 | 80 | 89 | 60.5 | 35 | 12 | 1.6 | 200 | R1/2" | 4-15 | 6 | 3/4" | 117 | 90 | 98 | 70 | 43 | 12 | 1.6 | 210 | R3/4" | 4-15 | 6 | 1" | 127 | 110 | 108 | 79.5 | 51 | 12 | 1.6 | 250 | R1" | 4-15 | 8 | 11/4" | 140 | 127 | 117 | 89 | 64 | 13 | 1.6 | 260 | R1/4" | 4-15 | 8 | 11/2" | 165 | 156 | 127 | 98.5 | 73 | 15 | 1.6 | 290 | R11/2" | 4-15 | 13 | 2" | 203 | 170 | 152 | 120.5 | 92 | 16 | 1.6 | 370 | R2" | 4-19 | 13 | 21/2" | 216 | | 178 | 139.5 | 105 | 18 | 1.6 | 298 | | 4-19 | 16 | 3" | 241 | | 90 | 152.5 | 127 | 19 | 1.6 | 440 | | 4-19 | 20 | 4" | 292 | | 229 | 190.5 | 157 | 24 | 1.6 | 490 | | 4-19 | 25 | 5" | 356 | | 254 | 216 | 186 | 24 | 1.6 | 530 | | 8-22 | 32 | 6" | 406 | | 279 | 241.5 | 216 | 26 | 1.6 | 580 | | 8-22 | 40 | 8" | 495 | | 343 | 298.5 | 270 | 29 | 1.6 | 670 | | 8-22 | 50 | 10" | 622 | | | | | | | | | | | 12" | 698 | | | | | | | | | | | 300LB | 1/2" | 152 | 80 | 95 | 66.5 | 35 | 15 | 1.6 | 205 | R1/2" | 4-15 | 6 | 3/4" | 178 | 90 | 117 | 82.5 | 43 | 16 | 1.6 | 215 | R3/4" | 4-19 | 6 | 1" | 203 | 110 | 124 | 89 | 51 | 18 | 1.6 | 255 | R1" | 4-19 | 8 | 11/4" | 216 | 127 | 133 | 98.5 | 64 | 19 | 1.6 | 265 | R1/4" | 4-19 | 8 | 11/2" | 229 | 156 | 156 | 114.5 | 73 | 21 | 1.6 | 295 | R11/2" | 4-22 | 13 | 2" | 267 | 170 | 165 | 127 | 92 | 23 | 1.6 | 375 | R2" | 8-19 | 13 | 21/2" | 292 | | 190 | 149 | 105 | 26 | 1.6 | 403 | | 8-22 | 16 | 3" | 318 | | 210 | 168.5 | 127 | 29 | 1.6 | 445 | | 8-22 | 20 | 4" | 356 | | 254 | 200 | 157 | 32 | 1.6 | 495 | | 8-22 | 25 | 5" | 400 | | 279 | 235 | 186 | 35 | 1.6 | 535 | | 8-22 | 32 | 6" | 444 | | 318 | 270 | 216 | 37 | 1.6 | 585 | | 12-22 | 40 | 8" | 559 | | 381 | 330 | 270 | 42 | 1.6 | 675 | | 12-25 | 50 | 10" | 165 | | | | | | | | | | | 12" | 190 | | | | | | | | | | | 600LB | | | | | | | | | | | | | 3/4" | 711 | 90 | 118 | 82.5 | 43 | 23 | 6.4 | 220 | R1/2" | 4-19 | 6 | 1" | 216 | 110 | 124 | 89 | 51 | 25 | 6.4 | 260 | R3/4" | 4-19 | 8 | 11/4" | 229 | 127 | 133 | 98.5 | 64 | 28 | 6.4 | 275 | R1" | 4-19 | 8 | 11/2" | 241 | 156 | 156 | 114.5 | 73 | 30 | 6.4 | 300 | R1/4" | 4-22 | 13 | 2" | 292 | 170 | 165 | 127 | 92 | 33 | 6.4 | 380 | R11/2" | 8-19 | 13 | 21/2" | 330 | | 190 | 149 | 100 | 36 | 6.4 | 408 | R2" | 8-22 | 16 | 3" | 356 | | 210 | 168 | 127 | 39 | 6.4 | 450 | | 8-22 | 20 | 4" | 432 | | 273 | 216 | 157 | 45 | 6.4 | 500 | | 8-25 | 25 | 5" | 508 | | 330 | 255.5 | 186 | 52 | 6.4 | 540 | | 8-29 | 32 | 6" | 559 | | 356 | 292 | 216 | 55 | 6.4 | 590 | | 12-29 | 40 | 8" | 660 | | | | | | | | | | | 10" | 787 | | | | | | | | | | | 12" | | | | | | | | | |
法蘭截止閥屬于強制密封式閥門,所以在閥門關(guān)閉時,必須向閥瓣施加壓力,以強制密封面不泄漏。當(dāng)介質(zhì)由閥瓣下方進入閥六時,操作力所需要克服的阻力,是閥桿和填料的磨擦力與由介質(zhì)的壓力所產(chǎn)生的推力,關(guān)閥門的力比開閥門的力大,所以閥桿的直徑要大,否則會發(fā)生閥桿頂彎的故障。近年來,從自密封的閥門出現(xiàn)后,法蘭截止閥的介質(zhì)流向就改由閥瓣上方進入閥腔,這時在介質(zhì)壓力作用下,關(guān)閥門的力小,而開閥門的力大,閥桿的直徑可以相應(yīng)地減少。同時,在介質(zhì)作用下,這種形式的閥門也較嚴密。我國閥門“三化給”曾規(guī)定,截止閥的流向,一律采用自上而下。
截止閥開啟時,閥瓣的開啟高度,為公稱直徑的25%~30%時,流量已達到zui大,表示閥門已達全開位置。所以截止閥的全開位置,應(yīng)由閥瓣的行程來決定。 本類閥門在管道中一般應(yīng)當(dāng)水平安裝。
截止閥具有以下優(yōu)點: 1、結(jié)構(gòu)簡單,制造和維修比較方便。
2、工作行程小,啟閉時間短。
3、密封性好,密封面間磨擦力小,壽命較長。
截止閥的缺點如下:
1、流體阻力大,開啟和關(guān)閉時所需力較大。
2、不適用于帶顆粒、粘度較大、易結(jié)焦的介質(zhì)。
3、調(diào)節(jié)性能較差。
法蘭截止閥的種類按閥桿螺紋的位置分有外螺紋式、內(nèi)螺紋式。按介質(zhì)的流向分,有直通式、直流式和角式。截止閥按密封形式分,有填料密封截止閥和波紋管密封截止閥。
截止閥的結(jié)構(gòu)形式:
截止閥閥體的結(jié)構(gòu)形式有直通式、直流式和直角式。直通式是zui常見的結(jié)構(gòu),但其流體的阻力zui大。直流式流體阻力較小,多用于含固體顆?;蛘扯却蟮牧黧w。直角式閥體多采用鍛造,適用于較小通經(jīng)、較高壓力的的截止閥。