New Source RexrothR928028411 WE-2SPSU-M12X1 Hydraulic Filter Cartridge

As the plunger further rises, the oil pressure in the pump chamber increases sharply. When the pump oil pressure exceeds the spring force of the oil outlet valve and the remaining pressure in the high-pressure oil pipe, the oil outlet valve is pushed open, and high-pressure diesel then flows into the high-pressure oil pipe through the oil outlet valve and is finally injected into the combustion chamber through the injector. After the fuel injection is completed, as the plunger moves downwards, the pressure in the pump oil chamber decreases, and the oil outlet valve closes under the action of spring force, completing the oil return process