本機(jī)組用于真空冶煉、焊接、干燥及化工制藥、電力真空器件等工業(yè)作為抽真空用,本機(jī)組的工作壓力為133Pa-5Pa,所能達(dá)到的極限真空為5Pa,具有啟動(dòng)快、抽速大、性能穩(wěn)定、操作簡(jiǎn)便等特點(diǎn)。
本機(jī)組為羅茨真空泵抽氣機(jī)組,它以羅茨泵作為主泵,以旋片式真空泵作為前級(jí)泵。在前級(jí)泵與主泵中間串聯(lián)一個(gè)電磁真空充氣閥,隨前級(jí)泵開(kāi)關(guān)而啟閉。在本機(jī)組的進(jìn)氣口處安裝電接點(diǎn)真空開(kāi)關(guān),以便準(zhǔn)確地觀察被抽設(shè)備或容器的殘余氣體狀況和控制羅茨泵啟動(dòng)。
本機(jī)組不適用于抽除含氧過(guò)高的、有毒的、有爆炸性、含水分重的、對(duì)金屬材料有腐蝕作用的、對(duì)泵油起化學(xué)反應(yīng)以及含有顆粒塵埃的氣體,同時(shí)也不適用于把氣體從一個(gè)容器送到另一個(gè)容器作為輸送真空機(jī)用。
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