The water pump set has been designed specifically for use on a filter press unit. It incorporates a 3/2 way co-axial valve, which can be remotely operated so as to stop the flow of water to the filter press and return it upstream of the pump suction line under no pressure, thus reducing power consumption of the pump set, whilst flow and pressure to the filter press is not required.
Due to the cyclic discharge of a positive displacement pump, a discharge dampener is also fitted in the discharge line to reduce peak pressures to the filter press. When maintained at the correct “charge pressure”, these dampeners are very effective. A loss in “charge pressure” may result in excessive vibration in the discharge line.
System pressure is obtained by correct sizing of the discharge nozzles, excessive wear of these nozzles will result in a loss of pressure in the system. To protect the system from over pressure, a pressure regulating and a relief valve are fitted to the pump discharge head.