... portable, low noise, aggressive pump, ultimate pressure 200mbar, pumping speed 60L/Min, diaphragm pump /dry pump/vacuum pump Jinteng GM ... Tianjin Jinteng Experiment Equipment Co.,Ltd. JintengGM-1.00 diaphragm vacuum pump has features of more advanced design, ... producing no calories and having no friction exhausts. The diaphragm is made of hydrogenated acrylonitrile-butadiene rubber, which resists ...