3 piston displacement pumps for cleaning units and industrial systems. Can be connected directly or coupled to different types of motors through elastic couplings. Die cast aluminum alloy pump body. Side cover closed. The movement of the piston is carried out through the link - crank system. The pump shaft is made of pressed high strength steel. Oversized main bearing. Special zinc alloy connecting rod - die-cast aluminum with friction resistance. The possibility of bronze connecting rods. Pressed brass pump head. Double gasket sealing system. Transfer valve cover for better maintenance. The control valve is integrated into the pump head with cleaner ejector.