1、真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)的(de)(de)工作壓(ya)強(qiang)應該滿足真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)設(she)備的(de)(de)極(ji)(ji)(ji)限真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)及工作壓(ya)強(qiang)要(yao)(yao)求(qiu)(qiu)。如(ru)：某真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)干燥(zao)工藝要(yao)(yao)求(qiu)(qiu)10mmHg的(de)(de)工作真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)度(du)(du)，選(xuan)用的(de)(de)真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)的(de)(de)極(ji)(ji)(ji)限真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)度(du)(du)至少要(yao)(yao)2mmHg，最好能達到1mmHg。通(tong)常選(xuan)擇泵(beng)(beng)的(de)(de)極(ji)(ji)(ji)限真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)度(du)(du)要(yao)(yao)高于真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)設(she)備工作真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)度(du)(du)半個到一(yi)個數(shu)量級。 2、正(zheng)確地(di)選(xuan)擇真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)的(de)(de)工作點。每種泵(beng)(beng)都(dou)有一(yi)定(ding)的(de)(de)工作壓(ya)強(qiang)范圍(wei)，如(ru)：2BV系(xi)列(lie)水環真(zhen)空(kong)(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)工作壓(ya)強(qiang)范圍(wei)760mmHg~25mmHg（絕壓(ya)），在這樣寬壓(ya)強(qiang)范圍(wei)內(nei)，泵(beng)(beng)的(de)(de)抽速隨壓(ya)強(qiang)而變化(hua)(hua)（詳細變化(hua)(hua)情況(kuang)參照泵(beng)(beng)的(de)(de)性能曲(qu)線），其穩定(ding)的(de)(de)工作壓(ya)強(qiang)范圍(wei)為760~

低真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)裝置(zhi)如真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)輸送、真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)浸漬、真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)過(guo)(guo)濾、真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)單(dan)調、真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)脫氣（鋼(gang)水處置(zhi)）等懇求(qiu)具(ju)有工(gong)作壓力(li)高(gao)、排氣量(liang)大的低真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)抽氣機(ji)組(zu)，這類低真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)抽氣機(ji)組(zu)主泵(beng)(beng)常用往復(fu)式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、油封式真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)泵(beng)(beng)、水蒸氣放射(she)泵(beng)(beng)、水環(huan)泵(beng)(beng)、羅茨泵(beng)(beng)等。運用的低真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)抽氣機(ji)組(zu)還需根據被抽氣體清潔程度(du)、濕度(du)或其他特殊懇求(qiu)，配置(zhi)必要的除塵器、單(dan)調罐等部件。 水蒸氣在緊縮(suo)過(guo)(guo)程中(zhong)會(hui)凝結成水滴，并與泵(beng)(beng)混合構成懸浮液，不只會(hui)使(shi)真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)度(du)降落，也能使(shi)泵(beng)(beng)腔與轉子(zi)生(sheng)銹，破壞密封面，使(shi)泵(beng)(beng)的極限真(zhen)(zhen)(zhen)空(kong)(kong)(kong)(kong)(kong)度(du)降落。為此(ci)，防止水蒸氣對機(ji)械泵(beng)(beng)的污染

據(ju)中(zhong)國建(jian)材雜志(zhi)消息，近日，南(nan)京玻(bo)璃纖維研究設(she)計(ji)院牽頭制定(ding)的(de)兩(liang)項真(zhen)空(kong)絕熱(re)板(ban)(ban)國家(jia)標準(zhun)GB/T 39548—2020《真(zhen)空(kong)絕熱(re)板(ban)(ban)濕(shi)熱(re)條件下熱(re)阻(zu)保留(liu)率的(de)測(ce)定(ding)》和(he)GB/T 39704—2020《真(zhen)空(kong)絕熱(re)板(ban)(ban)有(you)效導熱(re)系(xi)數的(de)測(ce)定(ding)》由國家(jia)市(shi)場監督管理總局批準(zhun)發布。這兩(liang)項標準(zhun)將于(yu)2021年(nian)11月1日實(shi)施。 真(zhen)空(kong)絕熱(re)板(ban)(ban)（VIP）是(shi)一種超級(ji)絕熱(re)材料，具(ju)有(you)環保和(he)高(gao)效節能的(de)特性(xing)，在冰箱(xiang)、冷(leng)鏈、建(jian)筑等行(xing)業具(ju)有(you)廣泛的(de)應用(yong)。但(dan)由于(yu)其結(jie)構的(de)特殊性(xing)，在使用(yong)過程(cheng)中(zhong)很可能發生失效，造成保溫性(xing)能的(de)衰減。 目前(qian)，市(shi)場