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操作(zuo)形(xing)式；該(gai)(gai)閥(fa)(fa)(fa)(fa)采(cai)用導(dao)閥(fa)(fa)(fa)(fa)，主閥(fa)(fa)(fa)(fa)構造，結構緊湊，重(zhong)量較(jiao)輕。該(gai)(gai)閥(fa)(fa)(fa)(fa)安裝于水泵(beng)(beng)(beng)(beng)出(chu)口(kou),在單泵(beng)(beng)(beng)(beng)啟動(dong)和非全數(shu)設計(ji)工(gong)(gong)(gong)作(zuo)泵(beng)(beng)(beng)(beng)工(gong)(gong)(gong)作(zuo)時(shi)，對(dui)工(gong)(gong)(gong)作(zuo)泵(beng)(beng)(beng)(beng)起限制(zhi)(zhi)流(liu)(liu)(liu)量作(zuo)用，使(shi)泵(beng)(beng)(beng)(beng)在較(jiao)率(lv)狀態(tai)下工(gong)(gong)(gong)作(zuo)；防(fang)止電(dian)(dian)動(dong)機在水泵(beng)(beng)(beng)(beng)低(di)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)、大流(liu)(liu)(liu)量、低(di)效率(lv)時(shi)，發生過載(zai)現象(xiang)；防(fang)止超額(e)定(ding)電(dian)(dian)流(liu)(liu)(liu)燒電(dian)(dian)機現象(xiang)的(de)(de)(de)(de)(de)發生，同時(shi)起到一定(ding)的(de)(de)(de)(de)(de)節能效果。其限流(liu)(liu)(liu)原理為：依(yi)據水泵(beng)(beng)(beng)(beng)的(de)(de)(de)(de)(de)設計(ji)工(gong)(gong)(gong)況(kuang)(kuang)點揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)，導(dao)閥(fa)(fa)(fa)(fa)自動(dong)檢測并控(kong)(kong)制(zhi)(zhi)水泵(beng)(beng)(beng)(beng)的(de)(de)(de)(de)(de)實際(ji)工(gong)(gong)(gong)作(zuo)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)，以限制(zhi)(zhi)水泵(beng)(beng)(beng)(beng)的(de)(de)(de)(de)(de)工(gong)(gong)(gong)作(zuo)流(liu)(liu)(liu)量，限制(zhi)(zhi)電(dian)(dian)機的(de)(de)(de)(de)(de)負載(zai)。該(gai)(gai)閥(fa)(fa)(fa)(fa)設定(ding)一個控(kong)(kong)制(zhi)(zhi)工(gong)(gong)(gong)作(zuo)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)，當(dang)水泵(beng)(beng)(beng)(beng)工(gong)(gong)(gong)作(zuo)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)低(di)于控(kong)(kong)制(zhi)(zhi)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)時(shi)閥(fa)(fa)(fa)(fa)門做關閥(fa)(fa)(fa)(fa)動(dong)作(zuo)，使(shi)實際(ji)工(gong)(gong)(gong)作(zuo)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)加大；當(dang)水泵(beng)(beng)(beng)(beng)工(gong)(gong)(gong)作(zuo)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)大于設定(ding)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)時(shi)閥(fa)(fa)(fa)(fa)門全開，閥(fa)(fa)(fa)(fa)門阻力極小(xiao)。控(kong)(kong)制(zhi)(zhi)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)設定(ding)可(ke)以按電(dian)(dian)機額(e)定(ding)電(dian)(dian)流(liu)(liu)(liu)設定(ding)，也可(ke)以按率(lv)工(gong)(gong)(gong)況(kuang)(kuang)設定(ding)，該(gai)(gai)閥(fa)(fa)(fa)(fa)門工(gong)(gong)(gong)作(zuo)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)設定(ding)值可(ke)調，一般出(chu)廠設定(ding)值為設計(ji)工(gong)(gong)(gong)況(kuang)(kuang)揚(yang)(yang)(yang)程(cheng)(cheng)(cheng)(cheng)(cheng)。

ASCO通用(yong)電磁閥：
結構名(ming)稱  主(zhu)要系列  閥體材料  接口尺寸  型(xing)號舉例(li) 
先導(dao)式通用 ; 8210 系列  黃銅(tong)或不銹鋼(gang)  3/8 " -2 1/2 "  8210G95 
直動式通(tong)用  8262/8263 系列  黃銅(tong)或(huo)不銹(xiu)鋼  1/8 " -3/8 "  8262G80 
常閉，內置先導式(shi)，浮(fu)動隔膜  238 系列  黃銅  3/8 " -1 "  SCE238A001 
常閉，先導，浮動膜(mo)片(pian)式先導  238 系列  黃銅  3/8 " -2 " ; SCE238B003 ;
常(chang)開，內(nei)部先(xian)導，浮動膜片式先(xian)導  238 系列  黃(huang)銅  1 1/4" -2 "  SCG238A019 
常(chang)閉直(zhi)動式(shi)  106 系列  黃(huang)銅  1/8 "  106 00 001 
常閉直(zhi)動式  106 系列(lie)  黃銅  1/4 "  106 00 186 
直動式  107 系列  黃銅  1/4 "  107 00 208 
直(zhi)動式(shi)  107 系列  黃銅  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