自(zi)動(dong)前(qian)級截(jie)止閥(fa)（反(fan)吸排氣(qi)(qi)(qi)(qi)閥(fa)）與機械(xie)泵(beng)的(de)(de)(de)電(dian)(dian)(dian)(dian)源(yuan)并聯(lian)，在其(qi)電(dian)(dian)(dian)(dian)源(yuan)或泵(beng)的(de)(de)(de)開(kai)關(guan)處(chu)(chu)。當電(dian)(dian)(dian)(dian)源(yuan)打(da)開(kai)時(shi)，電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)保(bao)持(chi)(chi)關(guan)閉(bi)(bi)狀(zhuang)態，使(shi)(shi)泵(beng)能夠(gou)保(bao)持(chi)(chi)截(jie)止閥(fa)體和真(zhen)空(kong)(kong)系(xi)統(tong)處(chu)(chu)于真(zhen)空(kong)(kong)狀(zhuang)態。機械(xie)泵(beng)的(de)(de)(de)電(dian)(dian)(dian)(dian)力中斷導(dao)致電(dian)(dian)(dian)(dian)磁(ci)(ci)閥(fa)打(da)開(kai)，使(shi)(shi)空(kong)(kong)氣(qi)(qi)(qi)(qi)進(jin)入(ru)截(jie)止閥(fa)，使(shi)(shi)其(qi)關(guan)閉(bi)(bi)。外部大(da)氣(qi)(qi)(qi)(qi)和真(zhen)空(kong)(kong)系(xi)統(tong)之間(jian)的(de)(de)(de)壓差(cha)提供了(le)必要的(de)(de)(de)力，可以(yi)(yi)在沒有電(dian)(dian)(dian)(dian)力或氣(qi)(qi)(qi)(qi)動(dong)幫(bang)助的(de)(de)(de)情(qing)況(kuang)(kuang)下將閥(fa)門(men)保(bao)持(chi)(chi)在其(qi)關(guan)閉(bi)(bi)位置(zhi)。在真(zhen)空(kong)(kong)系(xi)統(tong)隔(ge)離的(de)(de)(de)情(qing)況(kuang)(kuang)下，一系(xi)列小孔讓空(kong)(kong)氣(qi)(qi)(qi)(qi)進(jin)入(ru)機械(xie)泵(beng)的(de)(de)(de)進(jin)氣(qi)(qi)(qi)(qi)口，直到(dao)它(ta)上(shang)升(sheng)到(dao)大(da)氣(qi)(qi)(qi)(qi)壓。當電(dian)(dian)(dian)(dian)源(yuan)恢復時(shi)，螺線管關(guan)閉(bi)(bi)泵(beng)。然后(hou)重(zhong)(zhong)新啟動(dong)機械(xie)泵(beng)，并抽空(kong)(kong)活塞(sai)上(shang)方的(de)(de)(de)區域(yu)，直到(dao)壓力降低到(dao)接近(jin)真(zhen)空(kong)(kong)系(xi)統(tong)的(de)(de)(de)壓力。然后(hou)自(zi)動(dong)前(qian)級截(jie)止閥(fa)重(zhong)(zhong)新打(da)開(kai)，使(shi)(shi)真(zhen)空(kong)(kong)系(xi)統(tong)能夠(gou)以(yi)(yi)機械(xie)泵(beng)的(de)(de)(de)全速泵(beng)送。

• 消除因泵油回流造成的耗時且昂貴的真空管路清理
• 截止閥中的小孔將機械泵排放到大氣壓力，以便在電源恢復時輕松重新啟動
• 即使機械泵配備了防倒吸閥，也建議使用這些閥，因為泵的整體閥不會對泵進行排氣
• 提供各種 ISO-KF 法蘭尺寸、螺線管電壓和頻率
• 在發生電源故障時保護真空系統免受油回流（到泵）
• 啟用快速系統重啟
• 運行高達 100,000 次循環
• 驅動無需外部加壓氣源
• 有多種尺寸可供選擇，可與常見的機械泵配合使用