1、真(zhen)空(kong)(kong)(kong)泵的(de)(de)工(gong)(gong)作(zuo)壓(ya)(ya)強(qiang)應該滿足真(zhen)空(kong)(kong)(kong)設備的(de)(de)極(ji)(ji)限(xian)真(zhen)空(kong)(kong)(kong)及工(gong)(gong)作(zuo)壓(ya)(ya)強(qiang)要求。如：某真(zhen)空(kong)(kong)(kong)干燥工(gong)(gong)藝要求10mmHg的(de)(de)工(gong)(gong)作(zuo)真(zhen)空(kong)(kong)(kong)度(du)，選用的(de)(de)真(zhen)空(kong)(kong)(kong)泵的(de)(de)極(ji)(ji)限(xian)真(zhen)空(kong)(kong)(kong)度(du)至少要2mmHg，最好能(neng)達到(dao)1mmHg。通常選擇(ze)泵的(de)(de)極(ji)(ji)限(xian)真(zhen)空(kong)(kong)(kong)度(du)要高(gao)于真(zhen)空(kong)(kong)(kong)設備工(gong)(gong)作(zuo)真(zhen)空(kong)(kong)(kong)度(du)半個(ge)到(dao)一個(ge)數量級。 2、正確地選擇(ze)真(zhen)空(kong)(kong)(kong)泵的(de)(de)工(gong)(gong)作(zuo)點。每種泵都有一定的(de)(de)工(gong)(gong)作(zuo)壓(ya)(ya)強(qiang)范圍(wei)，如：2BV系列(lie)水環真(zhen)空(kong)(kong)(kong)泵工(gong)(gong)作(zuo)壓(ya)(ya)強(qiang)范圍(wei)760mmHg~25mmHg（絕壓(ya)(ya)），在這樣寬(kuan)壓(ya)(ya)強(qiang)范圍(wei)內，泵的(de)(de)抽速(su)隨壓(ya)(ya)強(qiang)而變(bian)化（詳細變(bian)化情況(kuang)參照泵的(de)(de)性能(neng)曲(qu)線），其穩(wen)定的(de)(de)工(gong)(gong)作(zuo)壓(ya)(ya)強(qiang)范圍(wei)為760~

低真(zhen)(zhen)空(kong)(kong)裝(zhuang)置如真(zhen)(zhen)空(kong)(kong)輸送、真(zhen)(zhen)空(kong)(kong)浸漬、真(zhen)(zhen)空(kong)(kong)過(guo)濾、真(zhen)(zhen)空(kong)(kong)單(dan)調、真(zhen)(zhen)空(kong)(kong)脫氣(qi)(qi)（鋼水處置）等懇求具有工(gong)作壓力高、排(pai)氣(qi)(qi)量大的(de)(de)低真(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)抽氣(qi)(qi)機組，這類低真(zhen)(zhen)空(kong)(kong)抽氣(qi)(qi)機組主(zhu)泵(beng)(beng)(beng)常用往復(fu)式(shi)真(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、油封式(shi)真(zhen)(zhen)空(kong)(kong)泵(beng)(beng)(beng)、水蒸(zheng)氣(qi)(qi)放射泵(beng)(beng)(beng)、水環(huan)泵(beng)(beng)(beng)、羅茨泵(beng)(beng)(beng)等。運用的(de)(de)低真(zhen)(zhen)空(kong)(kong)抽氣(qi)(qi)機組還需根(gen)據被抽氣(qi)(qi)體清潔程(cheng)度(du)、濕度(du)或其他特殊懇求，配置必(bi)要的(de)(de)除塵(chen)器、單(dan)調罐(guan)等部件。 水蒸(zheng)氣(qi)(qi)在緊縮過(guo)程(cheng)中會(hui)凝(ning)結(jie)成水滴，并(bing)與泵(beng)(beng)(beng)混(hun)合構成懸浮液(ye)，不(bu)只會(hui)使(shi)真(zhen)(zhen)空(kong)(kong)度(du)降落，也能(neng)使(shi)泵(beng)(beng)(beng)腔(qiang)與轉子生銹，破(po)壞密封面(mian)，使(shi)泵(beng)(beng)(beng)的(de)(de)極限真(zhen)(zhen)空(kong)(kong)度(du)降落。為此，防止水蒸(zheng)氣(qi)(qi)對機械泵(beng)(beng)(beng)的(de)(de)污(wu)染

據(ju)中國建材(cai)雜志消息，近日(ri)，南京玻璃纖維(wei)研究設計(ji)院牽(qian)頭制定(ding)的(de)(de)兩(liang)項(xiang)真(zhen)空絕(jue)(jue)熱(re)板(ban)(ban)國家標(biao)準GB/T 39548—2020《真(zhen)空絕(jue)(jue)熱(re)板(ban)(ban)濕熱(re)條件下熱(re)阻保(bao)留率的(de)(de)測(ce)定(ding)》和GB/T 39704—2020《真(zhen)空絕(jue)(jue)熱(re)板(ban)(ban)有效(xiao)導熱(re)系數的(de)(de)測(ce)定(ding)》由(you)(you)國家市(shi)場(chang)監督管理總局(ju)批準發布。這兩(liang)項(xiang)標(biao)準將于2021年11月1日(ri)實施。 真(zhen)空絕(jue)(jue)熱(re)板(ban)(ban)（VIP）是(shi)一種超級絕(jue)(jue)熱(re)材(cai)料，具有環保(bao)和高效(xiao)節能的(de)(de)特性(xing)，在冰箱、冷鏈、建筑等行業具有廣泛的(de)(de)應用。但(dan)由(you)(you)于其結(jie)構(gou)的(de)(de)特殊性(xing)，在使用過程(cheng)中很可能發生失效(xiao)，造成保(bao)溫(wen)性(xing)能的(de)(de)衰(shuai)減。 目(mu)前(qian)，市(shi)場(chang)