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根據壓(ya)(ya)(ya)力(li)參(can)數選(xuan)(xuan)擇(ze)(ze)SMC真(zhen)(zhen)空(kong)減(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)的(de)(de):原理(li)和結(jie)構品種 1、公(gong)稱壓(ya)(ya)(ya)力(li):這個參(can)數與其它通用(yong)(yong)閥(fa)(fa)門的(de)(de)含義是(shi)一(yi)樣的(de)(de),是(shi)根據管道公(gong)稱壓(ya)(ya)(ya)力(li)來定。 2、工(gong)(gong)(gong)作(zuo)壓(ya)(ya)(ya)力(li):如果工(gong)(gong)(gong)作(zuo)壓(ya)(ya)(ya)力(li)低(di)則必須選(xuan)(xuan)用(yong)(yong)直動(dong)(dong)或分步直動(dong)(dong)式(shi)原理(li);zui低(di)工(gong)(gong)(gong)作(zuo)壓(ya)(ya)(ya)差在0.04Mpa以上時(shi)直動(dong)(dong)式(shi)、分步直動(dong)(dong)式(shi)、先(xian)導式(shi)均可選(xuan)(xuan)用(yong)(yong)。 四、電(dian)氣選(xuan)(xuan)擇(ze)(ze):電(dian)壓(ya)(ya)(ya)規格(ge)應盡量(liang)優先(xian)選(xuan)(xuan)用(yong)(yong)AC220V、DC24較為方便。 五、根據持(chi)續(xu)工(gong)(gong)(gong)作(zuo)時(shi)間(jian)長(chang)(chang)短來選(xuan)(xuan)擇(ze)(ze):常閉、常開、或可持(chi)續(xu)通電(dian) 1、當SMC真(zhen)(zhen)空(kong)減(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)需要(yao)長(chang)(chang)時(shi)間(jian)開啟(qi),并(bing)且持(chi)續(xu)的(de)(de)時(shi)間(jian)多余關閉的(de)(de)時(shi)間(jian)應選(xuan)(xuan) SMC真(zhen)(zhen)空(kong)減(jian)(jian)壓(ya)(ya)(ya)閥(fa)(fa)用(yong)(yong)常開型。 2、要(yao)是(shi)開啟(qi)的(de)(de)時(shi)間(jian)短或開和關的(de)(de)時(shi)間(jian)不多時(shi),則選(xuan)(xuan)常閉型。 3、但(dan)是(shi)有些用(yong)(yong)于安全保護的(de)(de)工(gong)(gong)(gong)況,如爐、窯火(huo)焰監(jian)測,則不能(neng)選(xuan)(xuan)常開的(de)(de),應選(xuan)(xuan)可長(chang)(chang)期通電(dian)型。
SMC真空減壓閥(fa)(fa)(fa)是具有(you)(you)兩種以(yi)上(shang)流(liu)動(dong)(dong)(dong)形式(shi)和(he)(he)(he)兩個以(yi)上(shang)油口(kou)(kou)的(de)方(fang)向(xiang)(xiang)(xiang)控制閥(fa)(fa)(fa)。是實(shi)現液壓油流(liu)的(de)溝通(tong)(tong)、切斷和(he)(he)(he)換(huan)(huan)(huan)向(xiang)(xiang)(xiang),以(yi)及(ji)壓力卸載和(he)(he)(he)順(shun)序動(dong)(dong)(dong)作(zuo)(zuo)控制的(de)閥(fa)(fa)(fa)門。可分為手(shou)動(dong)(dong)(dong)換(huan)(huan)(huan)向(xiang)(xiang)(xiang)閥(fa)(fa)(fa)、電磁(ci)換(huan)(huan)(huan)向(xiang)(xiang)(xiang)閥(fa)(fa)(fa)、電液換(huan)(huan)(huan)向(xiang)(xiang)(xiang)閥(fa)(fa)(fa)等。閥(fa)(fa)(fa)門的(de)一種,具有(you)(you)多向(xiang)(xiang)(xiang)可調的(de)通(tong)(tong)道,可適時(shi)(shi)改變(bian)流(liu)體流(liu)向(xiang)(xiang)(xiang)。工(gong)作(zuo)(zuo)時(shi)(shi)借(jie)著閥(fa)(fa)(fa)外的(de)驅(qu)動(dong)(dong)(dong)傳動(dong)(dong)(dong)機(ji)構轉動(dong)(dong)(dong)驅(qu)動(dong)(dong)(dong)軸(zhou),帶動(dong)(dong)(dong)搖(yao)拐臂,啟動(dong)(dong)(dong)閥(fa)(fa)(fa)板,使工(gong)作(zuo)(zuo)流(liu)體時(shi)(shi)而(er)從左入口(kou)(kou)通(tong)(tong)向(xiang)(xiang)(xiang)閥(fa)(fa)(fa)的(de)下(xia)部(bu)出(chu)口(kou)(kou),時(shi)(shi)而(er)人右入口(kou)(kou)變(bian)換(huan)(huan)(huan)通(tong)(tong)向(xiang)(xiang)(xiang)下(xia)部(bu)出(chu)口(kou)(kou),實(shi)現了周(zhou)期變(bian)換(huan)(huan)(huan)流(liu)向(xiang)(xiang)(xiang)的(de)目(mu)的(de)。這種變(bian)換(huan)(huan)(huan)閥(fa)(fa)(fa)在石油、化(hua)工(gong)生產中(zhong)有(you)(you)著廣泛的(de)應用(yong),在合成氨(an)造氣系統中(zhong)zui為常用(yong)。此外,SMC真空減壓閥(fa)(fa)(fa)還可作(zuo)(zuo)成閥(fa)(fa)(fa)瓣(ban)式(shi)的(de)結構,多用(yong)于較(jiao)小流(liu)量的(de)場合。工(gong)作(zuo)(zuo)時(shi)(shi)只需轉動(dong)(dong)(dong)手(shou)輪通(tong)(tong)過閥(fa)(fa)(fa)瓣(ban)來(lai)變(bian)換(huan)(huan)(huan)工(gong)作(zuo)(zuo)流(liu)體的(de)流(liu)向(xiang)(xiang)(xiang)。
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