The pump unit, also known as the plunger pair, is the core component of theelectric grease lubrication pump, precision machined from bearing steel andequipped with a built-in check valve. The highest pressure can reach 25Mpa, theminimum matching gap is 3-5um. The rated displacement is 0.12cc or 0.18cc.The pump element transports lubricating pressure fluid, and at the same timegenerates back pressure on the working resistance of the connectedactuator.The function of the pump element is to make the piston of the pumpelement push and pull through the eccentric wheel to suck in the grease or oil inthe element cavity, and then pressurize the grease or oil into the pipeline.