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125D25*2,500S98---------參數(shù)、價格、圖片、 125D25*2多級離心泵,500S98中開泵,有好禮回饋,心動不如行動！主導(dǎo)產(chǎn)品有15個系列(IS型單級單吸清水離心泵,S、SA、SAP、SH型單級雙吸離心泵 ,D、DG、DM、DF型多級泵,DL、DLR型立式多級泵,IHJHG型化工離心泵,ISGJHG、IRG型立式管道泵,R、IR型熱水循環(huán)泵 ,等,118個品種,964個規(guī)格 ,產(chǎn)品遍及全國各地,并銷往日、韓、中東、非洲24個和地區(qū),服務(wù)領(lǐng)域覆蓋能源、礦山、冶金、石油、化工、建材 、交通、輕紡、食品、船舶、制藥、城建、海洋開發(fā)和農(nóng)田排灌等行業(yè)。
什么叫汽蝕余量？什么叫吸程？各自計量單位表示字母？
泵在工作時液體在葉輪的進口處因一定真空壓力下會產(chǎn)生汽體，汽化的氣泡在液體質(zhì)點的撞擊運動下，對葉輪等金屬表面產(chǎn)生剝蝕，從而破壞葉輪等金屬，此時真空壓力叫汽化壓力，汽蝕余量是指在泵吸入口處單位重量液體所具有的超過汽化壓力的富余能量。l單位用米標注，用（npsh）r。吸程即為必需汽蝕余量δh：即泵允許吸液體的真空度，亦即泵允許的安裝高度，單位用米。
吸程=標準大氣壓（10.33米）-汽蝕余量-安全量（0.5米）
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