PFE series high-performance vane pumps have eight series and 75 specifications, including single pumps (PFE-31/41/51/32/42/52) and double pumps (PFED-4131/5141). The displacement range is 16.5~150m/r, the rated pressure is 21~30Mpa, and the speed range is 600~2800r/min (on this basis, our company has developed two series of single pumps, PFE-21/61, four series of double pumps, PFED-3121/4121/5121/5131, and two series of through-shaft pumps, PFET-41/51, which expand the displacement range to 5~250mI/r). This series of pumps is a plug-in structure. The optimal design of the movement further reduces pressure, flow pulsation, and noise. The front and rear side plates have the same structure, with symmetrical grooves, and are hydraulically balanced to ensure consistent deformation and compensation, so as to obtain better volumetric efficiency. The reasonable design of the oil supply system at the root of the blade and the pin ensures good contact between the blade and the stator and minimizes flow loss. The unique design, high-precision processing, and reasonable selection of materials give the pump a very good life index.