Alternative volumetric pump with 3 pistons for use on washing units and industrial systems. Pump body and covers in die-cast aluminium alloy. Rear cover with oil drain and oil level. Plug with dipstick for oil level on pump body. Movement of the pistons realised through the system of the connecting rod - crank. Pump shaft in moulded high-strength steel. Oversized main bearings. Connecting rods in bronze. Full ceramic pistons. Pump head in nickel-plated brass. Double seal sealing system. Valve plugs for both suction and delivery for better maintenance.