Features :◆ High chemical resistantAll wetted parts of Chemker series pump are made of PTFE material which can resist most of corrosive gases.◆ No air pollution, maintenance freeChemker series pumps are driven by Diaphragm, without the need of lubricant, regular oil changes and maintenance; with no oil pollution.◆ Quiet and low vibrationDriven direct by motor with no additional belt-driven transmission; the quality vibration-proof assembly makes Chemker series run at the lowest noise level among all other equivalent pumps.◆ Thermal protection deviceEvery motor of Chemker series pumps has a built-in thermal protection device to shut off the pump automatically when overheated and then resume working when the temperature cools down.International certification :◆ CE certificationApplications :◆ Vacuum filtration◆ Gel electrophoresis◆ Solid-Phase Extraction (SPE)◆ Solvent purification