All-Flo’s Air-Operated Diaphragm Pumps, Perfect for Filter-Press Applications

In a wide variety of industries, All-Flo Air-Operated Diaphragm pumps (AODD) are ideal for filter press applications.  All-Flo AODD’s can be found in filter presses in a wide range of industries, including; Wastewater, Metal Fabrication, Food Processing, Chemical, Paint and Varnish, Agriculture and Manufacturing.

Air-Operated Diaphragm pumps are uniquely suited to filter-press applications due to their reaction to head pressure.  At the start of any filter operation, the filter is relative clean and offers low resistance.  Low resistance allows a large volume of fluid to be delivered to the filter.  As the volume of fluid in the filter increases, so too does the resistance (i.e head pressure) seen by the pump.  When the head pressure equals the input pressure of the AODD, the pump ceases to transfer fluid into the filter press.  Since the input pressure and head pressure are in equilibrium, operation comes to a standstill, and unlike mechanically driven pumps, the AODD does not consume additional energy.  This permits continuous operation over a wide range of flow rates, without the risk of pressure build-up.

In comparison, other pump types are not as receptive to larger solids as diaphragm 
pumps are.  Gear pumps, for example, need a filter installed before the pump, and this means that only a certain amount of pressure can be applied to push the substance through before the filter gets clogged. Once the filter device is clogged in the gear pump, you need to replace it.

Our 1-inch and 2-inch pumps are some of the best devices to handle the larger solids, but all of our pumps are suitable for filter-press applications.  Use our fast pump finder tool to find the right pumps for your filtration applications, or contact us for more information.


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