3-piston alternating volumetric pumps for use on cleaning units. Can be directly coupled to various types of motors. For gasoline engine flange ø 3/4 “SAE J609a included. Pump body in die-cast aluminium alloy. Pistons driven by swash plate mechanism. Two bearing systems, to support the pump shaft and pistons. Pistons in ceramic-coated steel. Pump head in pressed brass. Double gasket sealing system. Intake valves fitted above the pistons for greater efficiency. Integral regulating valve. Optional detergent suction system. Different delivery connections available.