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操作(zuo)(zuo)(zuo)(zuo)形式；該閥(fa)(fa)采用導閥(fa)(fa)，主閥(fa)(fa)構(gou)造，結構(gou)緊湊，重量較(jiao)輕。該閥(fa)(fa)安裝于水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)出(chu)口(kou),在單泵(beng)(beng)(beng)(beng)(beng)啟(qi)動和非全(quan)數設(she)(she)計(ji)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)泵(beng)(beng)(beng)(beng)(beng)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)時(shi)，對工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)泵(beng)(beng)(beng)(beng)(beng)起限(xian)制(zhi)流(liu)量作(zuo)(zuo)(zuo)(zuo)用，使(shi)泵(beng)(beng)(beng)(beng)(beng)在較(jiao)率(lv)狀(zhuang)態下(xia)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)；防止電(dian)(dian)動機(ji)在水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)低揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)、大(da)流(liu)量、低效(xiao)率(lv)時(shi)，發(fa)生(sheng)過載(zai)現象；防止超額定(ding)(ding)(ding)電(dian)(dian)流(liu)燒(shao)電(dian)(dian)機(ji)現象的(de)(de)發(fa)生(sheng)，同時(shi)起到(dao)一定(ding)(ding)(ding)的(de)(de)節能效(xiao)果。其(qi)限(xian)流(liu)原理為：依據水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)的(de)(de)設(she)(she)計(ji)工(gong)(gong)況(kuang)點揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)，導閥(fa)(fa)自動檢測并控(kong)制(zhi)水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)的(de)(de)實(shi)際(ji)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)，以限(xian)制(zhi)水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)的(de)(de)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)流(liu)量，限(xian)制(zhi)電(dian)(dian)機(ji)的(de)(de)負(fu)載(zai)。該閥(fa)(fa)設(she)(she)定(ding)(ding)(ding)一個控(kong)制(zhi)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)，當(dang)水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)低于控(kong)制(zhi)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)時(shi)閥(fa)(fa)門(men)做關(guan)閥(fa)(fa)動作(zuo)(zuo)(zuo)(zuo)，使(shi)實(shi)際(ji)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)加大(da)；當(dang)水(shui)(shui)泵(beng)(beng)(beng)(beng)(beng)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)大(da)于設(she)(she)定(ding)(ding)(ding)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)時(shi)閥(fa)(fa)門(men)全(quan)開(kai)，閥(fa)(fa)門(men)阻力(li)極小。控(kong)制(zhi)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)的(de)(de)設(she)(she)定(ding)(ding)(ding)可以按電(dian)(dian)機(ji)額定(ding)(ding)(ding)電(dian)(dian)流(liu)設(she)(she)定(ding)(ding)(ding)，也可以按率(lv)工(gong)(gong)況(kuang)設(she)(she)定(ding)(ding)(ding)，該閥(fa)(fa)門(men)工(gong)(gong)作(zuo)(zuo)(zuo)(zuo)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)設(she)(she)定(ding)(ding)(ding)值可調，一般出(chu)廠設(she)(she)定(ding)(ding)(ding)值為設(she)(she)計(ji)工(gong)(gong)況(kuang)揚(yang)(yang)(yang)(yang)(yang)程(cheng)(cheng)。

ASCO通用電磁閥：
結構名稱  主(zhu)要系列(lie)  閥體材料  接口(kou)尺寸  型號舉例(li) 
先導式(shi)通(tong)用(yong)  8210 系列  黃銅(tong)或不銹鋼  3/8 " -2 1/2 "  8210G95 
直動(dong)式通(tong)用  8262/8263 系列  黃銅或(huo)不銹(xiu)鋼(gang)  1/8 " -3/8 "  8262G80 
常(chang)閉，內置先(xian)導式，浮動隔膜  238 系列  黃銅  3/8 " -1 "  SCE238A001 
常(chang)閉，先(xian)導，浮動膜片式(shi)先(xian)導  238 系(xi)列  黃銅(tong)  3/8 " -2 "  SCE238B003 
常(chang)開，內部(bu)先(xian)導，浮動(dong)膜片式先(xian)導  238 系(xi)列  黃銅  1 1/4" -2 "  SCG238A019 
常閉直(zhi)動式  106 系列(lie)  黃銅  1/8 "  106 00 001 
常閉直動式  106 系列  黃銅(tong)  1/4 "  106 00 186 
直(zhi)動(dong)式  107 系列  黃銅  1/4 "  107 00 208 
直(zhi)動式  107 系列  黃銅(tong)  1/8 "  107 00 007 

HT8316G64 120VDC EF8551H421 24VDC EV8551G453 24VDC EF8401B101 DC24V EF8344G056 DC24V EF8344G70 DC24V EFHT8320G174 DC24V EFG551A017 DC24V EF8344G374 DC24V EF8316G64 24VDC EF8345G1M0 DC24V 400425-117 AC220/50HZ SCG353A043 DC24 EV8327G52 24VDC WT8551AOO1MMS DC24V G551A001MS 220VAC 123664-001-24VDC 18900002 SCE272A018E DC24V 19200009(43004183) SCE272A018 DC24V 238610-058D 35500344 AC220V 238710-006-D AC220V SCB327A001 AC220V 26490026 238614-158D 238710-106D SCG531A002MS 230VAC 52100001 DC24V 123664-001 AC24V 54391006 EF8320G200 220VAC 238610-158-D 238614-058D SCG551A001MS 430-04422 SCB320B174 AC220V 10700207 8215G20 238210-132-D 110V 314PEY6 95-250VAC 50/60H 54191027 220V EF8320G174 19000006 13100141 127VAC/50HZ 18900001 G551A017MS 12100128 127VAC/50HZ 30400008 K302116 AC220V WBIS8551A301 DC24V+底板 52100004 AC220V/50HZ