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SMC減壓(ya)閥選用標準(zhun):
標(biao)準一 在(zai)給定(ding)的彈(dan)簧壓力級范圍內,使出口壓力在(zai)大值與小值之間(jian)能(neng)連(lian)續(xu)調(diao)整,不(bu)得有卡阻和異常振動;
標(biao)準二(er) 對(dui)于(yu)軟密封的(de)(de)減(jian)壓閥,在規定(ding)的(de)(de)時(shi)間(jian)內不得有滲漏(lou);對(dui)于(yu)金屬密封的(de)(de)減(jian)壓閥,其滲漏(lou)量應不大于(yu)大流量的(de)(de)0.5%;
標準三 出口流量變化(hua)時,直接作(zuo)用式(shi)的出口壓(ya)力偏差(cha)值(zhi)不大于(yu)20%,先導式(shi)不大于(yu)10%;
標(biao)準四 進口壓(ya)力(li)變化時(shi),直接(jie)作用式的出(chu)口壓(ya)力(li)偏差不大于(yu)10%,先導式的不大于(yu)5%;
標準五 通常,減壓閥(fa)的閥(fa)后壓力(li)應小于閥(fa)前壓力(li)的0.5倍;
標準六 減(jian)壓閥的應用(yong)(yong)范(fan)圍(wei)很廣,在蒸汽、壓縮(suo)空(kong)氣、工業用(yong)(yong)氣、水、油(you)和許多其他液(ye)體介(jie)質的設(she)備(bei)和管路上均可使用(yong)(yong),介(jie)質流經減(jian)壓閥出口處的量(liang)(liang),一(yi)般用(yong)(yong)質量(liang)(liang)流量(liang)(liang)或體積(ji)流量(liang)(liang)表示;
標準七 波紋管直接作(zuo)用式減壓閥適用于(yu)低壓、中小口徑的蒸汽介質;
SMC減壓閥(fa)維(wei)護技巧:
1.為(wei)了操作和(he)維護方(fang)便,閥(fa)門(men)(men)通(tong)常安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)在(zai)水平管(guan)道(dao)(dao)上。2.減(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)的(de)安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)必(bi)須嚴(yan)格按照閥(fa)體(ti)上箭頭(tou)的(de)方(fang)向和(he)流體(ti)的(de)流向。如果水質含雜質,過(guo)濾(lv)(lv)器必(bi)須安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)在(zai)減(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)的(de)上游進(jin)(jin)口處(chu)(我(wo)們建議過(guo)濾(lv)(lv)精度不(bu)(bu)小于0.5mm)。3.為(wei)了防(fang)止(zhi)(zhi)閥(fa)門(men)(men)后的(de)壓(ya)(ya)(ya)力(li)過(guo)大,應該在(zai)閥(fa)門(men)(men)的(de)出口處(chu)安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)一個壓(ya)(ya)(ya)力(li)安(an)(an)(an)(an)(an)全(quan)閥(fa),不(bu)(bu)小于4M。4.減(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)在(zai)管(guan)道(dao)(dao)中(zhong)起著一定的(de)作用。為(wei)了防(fang)止(zhi)(zhi)水錘的(de)危害,還可以安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)小型膨(peng)脹(zhang)罐(guan)來防(fang)止(zhi)(zhi)管(guan)道(dao)(dao)和(he)閥(fa)門(men)(men)的(de)損壞。過(guo)濾(lv)(lv)器必(bi)須安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)在(zai)安(an)(an)(an)(an)(an)全(quan)閥(fa)進(jin)(jin)水管(guan)道(dao)(dao)之前,并且(qie)膨(peng)脹(zhang)罐(guan)必(bi)須安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)在(zai)減(jian)(jian)(jian)壓(ya)(ya)(ya)安(an)(an)(an)(an)(an)全(quan)閥(fa)出口后。5.如果需(xu)要在(zai)熱水系統中(zhong)安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)減(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa),則必(bi)須在(zai)減(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)和(he)膨(peng)脹(zhang)罐(guan)之間安(an)(an)(an)(an)(an)裝(zhuang)(zhuang)止(zhi)(zhi)回(hui)閥(fa)。通(tong)過(guo)這種方(fang)式(shi),膨(peng)脹(zhang)罐(guan)可以吸收由于熱膨(peng)脹(zhang)而(er)增加的(de)水量,防(fang)止(zhi)(zhi)熱水回(hui)流或壓(ya)(ya)(ya)力(li)波動對減(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)的(de)影響,從(cong)而(er)保證減(jian)(jian)(jian)壓(ya)(ya)(ya)閥(fa)的(de)長期正常運行。
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