閘閥是的截?cái)嚅y之一,主要用來接通或截?cái)喙苈分械慕橘|(zhì),不適用于調(diào)節(jié)介質(zhì)流量。閘閥適用的壓力、溫度及口徑范圍很大,尤其適用于中、大口徑的管道。
閘閥的主要優(yōu)點(diǎn):
(1)流體阻力小。閘閥閘體內(nèi)部介質(zhì)通道是直通的,介質(zhì)流經(jīng)閘閥時(shí)不改變其流動(dòng)方向,因而流動(dòng)阻力較小。
(2)啟閉較省力。啟閉時(shí)閘板運(yùn)動(dòng)方向與介質(zhì)流動(dòng)方向相垂直。與截止閥相比,閘閥的啟閉較為省力。
(3)介質(zhì)流動(dòng)方向一般不受限制。介質(zhì)可從閘閥兩側(cè)任意方向流過,均能達(dá)到接通或截?cái)嗟哪康摹1阌诎惭b,適用于介質(zhì)的流動(dòng)方向可能改變的管路中。
主要零件材料及性能規(guī)范
主要零部件 | 閥體 閥蓋 | 碳鋼 | 鉻鎳鈦不銹鋼 | 鉻鎳鉬鈦不銹鋼 | 超低碳不銹鋼 | 鉻鉬合金鋼 | 低溫碳鋼 | ||
閘板 閥座 | 碳鋼堆焊硬質(zhì)合金或不銹鋼 | 鉻鎳鈦不銹鋼 堆焊硬質(zhì)合金 | 鉻鎳鉬鈦不銹鋼 堆焊硬質(zhì)合金 | 超低碳不銹鋼 | 鉻鉬合金鋼 堆焊硬質(zhì)合金 | 不銹鋼堆焊硬質(zhì)合金 | |||
閥桿 | 鉻不銹鋼 | 鉻鎳鈦不銹鋼 | 鉻鎳鉬鈦不銹鋼 | 超低碳不銹鋼 | 鉻鉬合金鋼 | 不銹鋼 | |||
填料 | 石墨石棉盤根 | 浸聚四氟乙烯石棉盤根 | 柔性石墨石棉盤根 | 浸聚四氟乙烯石棉盤根 | |||||
墊片 | 石棉墊片 | 不銹鋼帶四氟乙烯纏繞墊片 | 柔性石墨+不銹鋼 | 聚四氟乙烯 | |||||
閥桿螺母 | 高鎳球鐵/ZguAL10Fe3 | ||||||||
主要參數(shù) | 適用介質(zhì) | 水、蒸汽、油品 | 硝酸類 | 醋酸類 | 尿素、甲銨液等 | 水、蒸汽、石油及石油產(chǎn)品 | 氨氣、液氨 | ||
適用溫度℃ | ≤425 | ≤200 | ≤200 | ≤200 | ≤550 | -45~150 | |||
型號(hào) | 公稱 | 主要結(jié)構(gòu)尺寸(mm) | 閥體 材料 | 性能規(guī)范 | |||||
通徑 DN(mm) | 壓力 PN(MPa) | D | D0 | L | H | 適用溫度(℃) | 適用介質(zhì) | ||
SFD46Z-40C150C | 1/2" | 150 | 89 | 140 | 108 | 345 | LCB | ≥-46 | NH3、丙烷 |
" | 3/4" | " | 98 | 150 | 117 | 355 | " | " | " |
" | 1" | " | 108 | 150 | 127 | 454 | " | " | " |
" | 2" | " | 152 | 200 | 178 | 481 | " | " | " |
" | 3" | " | 190 | 230 | 203 | 574 | " | " | " |
" | 4" | " | 229 | 280 | 229 | 708 | " | " | " |
" | 6" | " | 279 | 330 | 267 | 946 | " | " | " |
" | 8" | " | 343 | 380 | 292 | 1118 | " | " | " |
" | 10" | " | 406 | 460 | 330 | 1312 | " | " | " |
" | 12" | " | 483 | 510 | 356 | 1547 | " | " | " |
" | 14" | " | 533 | 560 | 381 | 1811 | " | " | " |
" | 16" | " | 597 | 560 | 406 | 2002 | " | " | " |
" | 18" | " | 635 | 610 | 432 | 2256 | " | " | " |
" | 20" | " | 698 | 760 | 457 | 2532 | " | " | " |
" | 24" | " | 813 | 810 | 508 | 3000 | " | " | " |
SFD101Z-40C150C | 1/2" | 150 | 89 | 140 | 108 | 405 | LC3 | ≥-101 | 乙烯等 |
" | 3/4" | " | 98 | 150 | 117 | 415 | " | " | " |
" | 1" | " | 108 | 150 | 127 | 514 | " | " | " |
" | 2" | " | 152 | 200 | 178 | 591 | " | " | " |
" | 3" | " | 190 | 230 | 203 | 634 | " | " | " |
" | 4" | " | 229 | 280 | 229 | 768 | " | " | " |
" | 6" | " | 279 | 330 | 267 | 1006 | " | " | " |
" | 8" | " | 343 | 380 | 292 | 1128 | " | " | " |
" | 10" | " | 406 | 460 | 330 | 1372 | " | " | " |
" | 12" | " | 483 | 510 | 356 | 1607 | " | " | " |
" | 14" | " | 533 | 560 | 381 | 1871 | " | " | " |
" | 16" | " | 597 | 560 | 406 | 2062 | " | " | " |
" | 18" | " | 635 | 610 | 432 | 2316 | " | " | " |
" | 20" | " | 698 | 760 | 457 | 2592 | " | " | " |
" | 24" | " | 813 | 810 | 508 | 3060 | " | " | " |
SFD196Z-40C150P | 1/2" | 150 | 89 | 140 | 108 | 405 | ZGOCr18Ni9 | ≥-196 | 液氨、乙烯、液化天然氣等 |