DSP serial comes in four models. Its maximum flow rate of 51L/min and a maximum pressure of 600Bar.  Selected forged brass pump head, high strength, no pores, long life, safe operation. The plunger uses precision machined ceramic plungers for increased durability and suitability.  Better oil seal system uses stainless steel spring to ensure sufficient tension, "U" type "nitrile" material low pressure water seal design to improve pump performance, improve the service life of the plunger support guide ring, ensure plunger coaxiality, and extend the service life of the water seal and plunger.