The pumping speed of HG-30D diaphragm Vacuumpump is 30L/min, the ultimate pressure is > 0.095Mpa (50mb), and the positive pressure is 0psi. HG-30D diaphragm Vacuumpump is mainly used in vacuum distillation, reaction kettle, vacuum suctionfiltration, vacuum condensing, vacuum drying, for compression and conversion of gases, etc.