3 piston displacement pumps for cleaning units and industrial systems. Can be connected directly or coupled to different types of motors through elastic couplings. Flange? 1 "SAE J609a included for internal combustion engines. Aluminum alloy pump body with oil discharge device. Aluminum alloy rear cover. Piston movement through connecting rod - crank system. Pump shaft with high resistance pressed steel. Oversized main bearing bronze connecting rod with ceramic surface coated steel piston pressed brass pump head double washer seals system inlet and outlet caps for easy maintenance Built-in regulator.