鍛鋼閘(zhá)閥有(yǒu)三種閥蓋(gài)設計,第一(yī)種是螺栓型閥蓋,通(tōng)過凹凸面連接(jiē),采用(yòng)不鏽(xiù)鋼帶(dài)與柔(róu)性石墨纏(chán)繞墊(niàn)片,按需求也可采(cǎi)用環連(lián)接,第二(èr)種(zhǒng)是焊(hàn)接型閥蓋,通過(guò)螺紋(wén)密封後焊接,按(àn)需求(qiú)也可(kě)直(zhí)接采(cǎi)用剛性焊接,第三種是(shì)自密封閥(fá)蓋,通過螺(luó)紋(wén)與自密封閥蓋(gài)連(lián)接。
鍛鋼閘(zhá)閥的結構(gòu)設計與規(guī)範:
鍛(duàn)鋼閘(zhá)閥制造按(àn)api 602,bs5352,ansi b16.34.
試驗與(yǔ)驗(yàn)收按(àn)api 598,标識(shí)按(àn)照mss sp-25.
結構(gòu)型式如下:
1.全通(tōng)徑或縮徑;
2.明(míng)杆(gǎn)帶支架;
3.兩(liǎng)端自(zì)動調心的填料壓套;
4.用(yòng)纏繞式(shì)墊片(piàn)的螺(luó)栓型(xíng)閥蓋(gài)、螺(luó)紋(wén)密封(fēng)焊接(jiē)型(xíng)閥(fá)蓋,或(huò)自密封閥蓋
5.本(běn)體倒密封(fēng);
6.承插(chā)焊接(jiē)ansi/asme b16.11;
7.螺紋端(npt端(duān))按ansi/asme b1.20.1。
鍛(duàn)鋼閘閥材(cái)料表:
序号(hào) no. | 名 稱(chēng) | 美标碳(tàn)鋼 cs to astm | 美标合金(jīn)鋼 as to astm | 美标不鏽鋼鋼 ss to astm | ||
part name | type a 105 | type f22 | type f304(l) | type f316(l) | ||
1 | 閥(fá)體 | body | a105 | a182 f22 | a182 f304(l) | a182 f316(l) |
2 | 閥(fá)座 | seat ring | a276 420 | a276 304 | a276 f304(l) | a276 f316(l) |
3 | 閘闆 | wedge | a276 430&410 | a182 f304 | a182 f304(l) | a182 f316(l) |
4 | 閥(fá)杆 | stem | a182 f6 | a182 f304 | a182 f304(l) | a182 f316(l) |
5 | 墊(niàn)片 | gasket | corrugated ss+graphite | ss+ptfe | ||
6 | 閥(fá)蓋 | bonnet | a105 | a182 f22 | a182 f304(l) | a182 f316(l) |
7 | 螺栓 | bonnet bolt | a193 b7 | a193 b16 | a193 b8 | a193 b8m |
8 | 銷 | pin | a276 420 | a276 f304 | ||
9 | 填料壓(yā)套(tào) | gland | a276 410 | a182 f304(l) | a182 f316(l) | |
10 | 活節(jiē)螺絲(sī) | gland eyebolt | a193 b7 | a193 b16 | a193 b8 | a193 b8m |
11 | 填料壓蓋(gài) | gland flange | a105 | a182 f11 | a182 f304(l) | a182 f316(l) |
12 | 螺母 | gland nut | a194 2h | a 194 4 | a194 8 | a194 8m |
13 | 閥杆螺母(mǔ) | stem nut | a276 420/cu-alloy(銅合金) | |||
14 | 手輪鎖緊螺母 | h.w.lock nut | a 194 2h | a194 4 | a 194 8 | a194 8m |
15 | 銘牌 | nameplate | ss | |||
16 | 手(shǒu)輪 | handwheel | a197 | |||
17 | 襯墊(niàn) | bearing gasket | a473 431 | |||
18 | 填料 | stem packing | flexible graphite | ptfe | ||
适(shì)用介(jiè)質 suitable medium | (水(shuǐ)、油、氣等)w.o.g.etc | (酸類)hno3,ch3ooh etc | ||||
适用溫(wēn)度 suitable temperature | -29℃~425℃ | -29℃~550℃ | -29℃~180℃ |
注(zhù):可按要求采用其他(tā)材料(liào) note:other materials are available upon request.
cs=碳鋼 as=合金鋼 ss=不鏽鋼(gāng) cs=carbon steel;as=alloy steel;ss=stainless steel;
通徑(jìng) | 縮(suō)徑rb | 3/8 | 1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | ||
nps | 全徑(jìng)fb | 3/8 | 1/2 | 3/4 | 1 | 1 1/4 | 1 1/2 | 2 | ||
l | 150~800lb | 79 | 79 | 92 | 111 | 120 | 120 | 140 | 178 | |
900lb | 79 | 92 | 111 | 120 | 120 | 140 | 178 | 210 | ||
1500lb | 111 | 111 | 111 | 114 | 120 | 140 | 162 | 210 | ||
h(open) | 150~800lb | 158 | 158 | 169 | 197 | 236 | 246 | 283 | 330 | |
900~1500lb | 169 | 197 | 197 | 236 | 246 | 283 | 330 | 354 | ||
w | 150~800lb | 100 | 100 | 100 | 125 | 160 | 160 | 180 | 200 | |
900~1500lb | 100 | 125 | 125 | 160 | 160 | 180 | 200 | 240 | ||
weights | bolted | 150~800lb | 2.1 | 2.0 | 2.3 | 4.3 | 5.9 | 6.9 | 11.1 | 15.2 |
900~1500lb | 2.5 | 4.3 | 4.2 | 6.6 | 8.8 | 12.5 | 17.2 | 23.5 | ||
welded | 150~800lb | 1.8 | 1.7 | 2.0 | 3.8 | 5.1 | 6.1 | 10.2 | 14.2 | |
900~1500lb | 2.4 | 4.2 | 4.0 | 6.3 | 8.7 | 12.1 | 17.2 | 22 |
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