Membrane pump for pumping gaseous, liquid and pasty materials comprises a membrane valve having a holding-down device preventing downstream lifting of a valve membrane from a valve plate

摘要

Membrane pump (1) comprises a membrane valve (10, 11, 11') having a holding-down device (14, 18') preventing downstream lifting of a valve membrane from a valve plate. Preferred Features: The valve plate is made of a thermally insulating material, preferably polyetheretherketone (PEEK). The membrane valve has circular valve channels (12, 16, 16') and a disk membrane (13, 17, 17') with central fixing. The holding-down device is a circular disk radially arranged within the valve channels.