1、真(zhen)空(kong)(kong)泵(beng)(beng)的工(gong)(gong)作(zuo)壓(ya)(ya)(ya)強(qiang)(qiang)應該滿(man)足真(zhen)空(kong)(kong)設備(bei)的極(ji)限(xian)真(zhen)空(kong)(kong)及工(gong)(gong)作(zuo)壓(ya)(ya)(ya)強(qiang)(qiang)要求。如：某(mou)真(zhen)空(kong)(kong)干燥工(gong)(gong)藝要求10mmHg的工(gong)(gong)作(zuo)真(zhen)空(kong)(kong)度(du)，選(xuan)(xuan)用的真(zhen)空(kong)(kong)泵(beng)(beng)的極(ji)限(xian)真(zhen)空(kong)(kong)度(du)至少要2mmHg，最好能(neng)達(da)到1mmHg。通常選(xuan)(xuan)擇(ze)泵(beng)(beng)的極(ji)限(xian)真(zhen)空(kong)(kong)度(du)要高于真(zhen)空(kong)(kong)設備(bei)工(gong)(gong)作(zuo)真(zhen)空(kong)(kong)度(du)半個到一個數量級。 2、正(zheng)確地選(xuan)(xuan)擇(ze)真(zhen)空(kong)(kong)泵(beng)(beng)的工(gong)(gong)作(zuo)點。每(mei)種泵(beng)(beng)都有一定的工(gong)(gong)作(zuo)壓(ya)(ya)(ya)強(qiang)(qiang)范圍(wei)，如：2BV系列水環真(zhen)空(kong)(kong)泵(beng)(beng)工(gong)(gong)作(zuo)壓(ya)(ya)(ya)強(qiang)(qiang)范圍(wei)760mmHg~25mmHg（絕壓(ya)(ya)(ya)），在(zai)這樣寬壓(ya)(ya)(ya)強(qiang)(qiang)范圍(wei)內，泵(beng)(beng)的抽速隨壓(ya)(ya)(ya)強(qiang)(qiang)而(er)變(bian)(bian)化(hua)（詳細變(bian)(bian)化(hua)情況參(can)照泵(beng)(beng)的性能(neng)曲線），其穩定的工(gong)(gong)作(zuo)壓(ya)(ya)(ya)強(qiang)(qiang)范圍(wei)為760~

低真(zhen)空(kong)(kong)裝(zhuang)置如真(zhen)空(kong)(kong)輸送(song)、真(zhen)空(kong)(kong)浸(jin)漬、真(zhen)空(kong)(kong)過濾、真(zhen)空(kong)(kong)單調、真(zhen)空(kong)(kong)脫氣(qi)(qi)(qi)(qi)（鋼水處(chu)置）等(deng)懇(ken)求具有工作壓力高、排(pai)氣(qi)(qi)(qi)(qi)量大(da)的(de)(de)低真(zhen)空(kong)(kong)泵(beng)(beng)(beng)抽氣(qi)(qi)(qi)(qi)機(ji)組，這(zhe)類低真(zhen)空(kong)(kong)抽氣(qi)(qi)(qi)(qi)機(ji)組主泵(beng)(beng)(beng)常(chang)用往復式真(zhen)空(kong)(kong)泵(beng)(beng)(beng)、油封(feng)式真(zhen)空(kong)(kong)泵(beng)(beng)(beng)、水蒸(zheng)氣(qi)(qi)(qi)(qi)放射泵(beng)(beng)(beng)、水環泵(beng)(beng)(beng)、羅茨泵(beng)(beng)(beng)等(deng)。運(yun)用的(de)(de)低真(zhen)空(kong)(kong)抽氣(qi)(qi)(qi)(qi)機(ji)組還需(xu)根據被抽氣(qi)(qi)(qi)(qi)體清潔程度、濕度或其他特殊懇(ken)求，配置必要的(de)(de)除塵器(qi)、單調罐等(deng)部件(jian)。 水蒸(zheng)氣(qi)(qi)(qi)(qi)在緊縮過程中會凝結成水滴，并(bing)與泵(beng)(beng)(beng)混(hun)合(he)構(gou)成懸浮液，不(bu)只會使(shi)真(zhen)空(kong)(kong)度降落，也(ye)能使(shi)泵(beng)(beng)(beng)腔(qiang)與轉子(zi)生銹，破壞密封(feng)面(mian)，使(shi)泵(beng)(beng)(beng)的(de)(de)極限真(zhen)空(kong)(kong)度降落。為此，防止水蒸(zheng)氣(qi)(qi)(qi)(qi)對機(ji)械泵(beng)(beng)(beng)的(de)(de)污染(ran)

據中國(guo)(guo)建材(cai)雜(za)志消息，近日(ri)，南京玻璃纖維研究(jiu)設計院牽頭制定(ding)的(de)兩項真空絕(jue)(jue)熱(re)(re)板(ban)國(guo)(guo)家(jia)標(biao)準(zhun)GB/T 39548—2020《真空絕(jue)(jue)熱(re)(re)板(ban)濕(shi)熱(re)(re)條件下(xia)熱(re)(re)阻保(bao)(bao)留率(lv)的(de)測(ce)定(ding)》和(he)GB/T 39704—2020《真空絕(jue)(jue)熱(re)(re)板(ban)有效導熱(re)(re)系數的(de)測(ce)定(ding)》由(you)國(guo)(guo)家(jia)市場監督(du)管理總局(ju)批準(zhun)發布。這兩項標(biao)準(zhun)將(jiang)于2021年11月(yue)1日(ri)實(shi)施(shi)。 真空絕(jue)(jue)熱(re)(re)板(ban)（VIP）是(shi)一(yi)種超級絕(jue)(jue)熱(re)(re)材(cai)料，具有環保(bao)(bao)和(he)高(gao)效節能的(de)特(te)性(xing)，在(zai)(zai)冰箱(xiang)、冷鏈、建筑等行業具有廣泛的(de)應用。但由(you)于其結構的(de)特(te)殊性(xing)，在(zai)(zai)使用過程中很可(ke)能發生失效，造成保(bao)(bao)溫性(xing)能的(de)衰減。 目前，市場