1、真(zhen)空(kong)(kong)(kong)泵(beng)的(de)工(gong)(gong)作(zuo)压(ya)强(qiang)(qiang)(qiang)应该满(man)足真(zhen)空(kong)(kong)(kong)设备(bei)的(de)极(ji)(ji)限(xian)真(zhen)空(kong)(kong)(kong)及工(gong)(gong)作(zuo)压(ya)强(qiang)(qiang)(qiang)要求(qiu)(qiu)。如(ru)：某(mou)真(zhen)空(kong)(kong)(kong)干燥工(gong)(gong)艺(yi)要求(qiu)(qiu)10mmHg的(de)工(gong)(gong)作(zuo)真(zhen)空(kong)(kong)(kong)度(du)(du)，选用的(de)真(zhen)空(kong)(kong)(kong)泵(beng)的(de)极(ji)(ji)限(xian)真(zhen)空(kong)(kong)(kong)度(du)(du)至少要2mmHg，最好能(neng)达(da)到1mmHg。通(tong)常选择泵(beng)的(de)极(ji)(ji)限(xian)真(zhen)空(kong)(kong)(kong)度(du)(du)要高(gao)于真(zhen)空(kong)(kong)(kong)设备(bei)工(gong)(gong)作(zuo)真(zhen)空(kong)(kong)(kong)度(du)(du)半(ban)个到一个数(shu)量级(ji)。 2、正确地选择真(zhen)空(kong)(kong)(kong)泵(beng)的(de)工(gong)(gong)作(zuo)点。每种泵(beng)都(dou)有一定的(de)工(gong)(gong)作(zuo)压(ya)强(qiang)(qiang)(qiang)范围(wei)(wei)，如(ru)：2BV系列(lie)水环(huan)真(zhen)空(kong)(kong)(kong)泵(beng)工(gong)(gong)作(zuo)压(ya)强(qiang)(qiang)(qiang)范围(wei)(wei)760mmHg~25mmHg（绝压(ya)），在这(zhei)样宽压(ya)强(qiang)(qiang)(qiang)范围(wei)(wei)内，泵(beng)的(de)抽速(su)随压(ya)强(qiang)(qiang)(qiang)而变化（详细变化情(qing)况参照(zhao)泵(beng)的(de)性(xing)能(neng)曲线），其稳(wen)定的(de)工(gong)(gong)作(zuo)压(ya)强(qiang)(qiang)(qiang)范围(wei)(wei)为760~

低(di)(di)真(zhen)(zhen)空(kong)(kong)(kong)(kong)装置(zhi)如真(zhen)(zhen)空(kong)(kong)(kong)(kong)输送、真(zhen)(zhen)空(kong)(kong)(kong)(kong)浸渍、真(zhen)(zhen)空(kong)(kong)(kong)(kong)过滤、真(zhen)(zhen)空(kong)(kong)(kong)(kong)单调、真(zhen)(zhen)空(kong)(kong)(kong)(kong)脱气(qi)(qi)（钢水处置(zhi)）等(deng)恳(ken)求具(ju)有工作压力高、排气(qi)(qi)量(liang)大的(de)(de)低(di)(di)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)抽气(qi)(qi)机组(zu)，这类低(di)(di)真(zhen)(zhen)空(kong)(kong)(kong)(kong)抽气(qi)(qi)机组(zu)主泵(beng)(beng)常用往复(fu)式(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、油封式(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)泵(beng)(beng)、水蒸(zheng)气(qi)(qi)放射泵(beng)(beng)、水环泵(beng)(beng)、罗茨泵(beng)(beng)等(deng)。运用的(de)(de)低(di)(di)真(zhen)(zhen)空(kong)(kong)(kong)(kong)抽气(qi)(qi)机组(zu)还需根据被抽气(qi)(qi)体清洁程度(du)、湿度(du)或其他特殊恳(ken)求，配置(zhi)必要的(de)(de)除尘器、单调罐等(deng)部件。 水蒸(zheng)气(qi)(qi)在紧缩过程中会凝结成水滴，并(bing)与(yu)泵(beng)(beng)混(hun)合构成悬浮(fu)液，不(bu)只会使(shi)(shi)真(zhen)(zhen)空(kong)(kong)(kong)(kong)度(du)降(jiang)落(luo)，也能(neng)使(shi)(shi)泵(beng)(beng)腔与(yu)转(zhuan)子生锈，破坏密(mi)封面，使(shi)(shi)泵(beng)(beng)的(de)(de)极限真(zhen)(zhen)空(kong)(kong)(kong)(kong)度(du)降(jiang)落(luo)。为(wei)此，防止水蒸(zheng)气(qi)(qi)对机械泵(beng)(beng)的(de)(de)污染

据(ju)中国(guo)建(jian)材杂志(zhi)消(xiao)息，近(jin)日，南京(jing)玻璃纤维研究设(she)计院牵头制定的(de)(de)两项真(zhen)空(kong)(kong)绝热(re)(re)(re)(re)板国(guo)家标(biao)准(zhun)GB/T 39548—2020《真(zhen)空(kong)(kong)绝热(re)(re)(re)(re)板湿热(re)(re)(re)(re)条件下热(re)(re)(re)(re)阻(zu)保留率的(de)(de)测定》和GB/T 39704—2020《真(zhen)空(kong)(kong)绝热(re)(re)(re)(re)板有(you)效导热(re)(re)(re)(re)系(xi)数的(de)(de)测定》由国(guo)家市场监督管理总局批准(zhun)发(fa)布。这两项标(biao)准(zhun)将(jiang)于2021年11月1日实施。 真(zhen)空(kong)(kong)绝热(re)(re)(re)(re)板（VIP）是一种超级绝热(re)(re)(re)(re)材料，具有(you)环保和高效节(jie)能的(de)(de)特性(xing)，在冰箱、冷(leng)链、建(jian)筑等(deng)行业具有(you)广(guang)泛的(de)(de)应(ying)用(yong)。但由于其结(jie)构的(de)(de)特殊性(xing)，在使用(yong)过程中很可能发(fa)生(sheng)失效，造成保温性(xing)能的(de)(de)衰减。 目前(qian)，市场