Machines for the separation of solids from liquids, namely separators and water separators; engines (motors) for the driving of component parts and devices of water purification plants (as far as contained in this class)

Machines for the purification of waste water; machines for the winning of industrial water from sewage water and waste water, namely sewage treatment plants; water filtering devices and machines, particularly with membranes or membrane sections; water purification plants, devices and machines; water piping systems