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For vacuuming in Food stuff,medicine,chemical industry,electrical engineering,smelt,weld,dring - details see: https://www.machineto.com/jzj-series-vacuum-group-10281809

Features Good suction speed under low vacuum pressure Low noise,low vibration Air cooling,facility ,easy operation Able to normally work under high temperature Built-in filters,high filtering efficiency JZJ series vacuum pump group consist of backing up rotary vane vacuum pump and roots vacuum pump,there is magnet valve between the two pumps interlocked open and close with backing up pump,there is micro resistance vacuum gauge to observe residual gas in evacuated unit or port to control the start up of roots pump.