Second, the main performance parameters of the hydraulic pump 1, the pressure (1) working pressure of the hydraulic pump output pressure when the actual work is called work pressure. Working pressure loss depends on the pressure and the exhaust pipe of the size of the external load, regardless of the flow rate of the hydraulic pump. (2) Rated pressure pump under normal operating conditions, the maximum pressure according to the test standards for continuous operation called hydraulic pump rated pressure. (3) The maximum allowable pressure in excess of the rated pressure conditions, according to the test standards, to allow the pump to run short of the maximum pressure plant, known as the maximum allowable pressure of the hydraulic pump First, the volume of parts constituting the sealing cylindrical plunger and the cylinder bore, easy to process, can be obtained with high accuracy, good sealing performance hydraulic motor repair work at high pressure is still high volumetric efficiency; second hydraulic motor transformation, just change the working stroke of the plunger can be changed flow, easy to implement variable; third, piston main parts are compressive stress acting hydraulic motor installation, material strength properties can be fully utilized. Due to the high pressure piston pump, compact hydraulic motors, high efficiency, easy flow regulation, so the need for high pressure, high flow, high-power systems need to adjust the flow rate of the occasion and, as the goal planer, broaching machine, hydraulic machines, construction machinery , mining and metallurgy machinery, widely used on the ship. Piston arrangement and the direction of movement of the plunger can be divided into radial and axial piston pump piston into two categories, according to the assignment device type can be divided with a gap-type seal with flow deputy piston and valve piston pump with flow control devices into two categories, according to whether the variable displacement piston pumps are divided into quantitative and variable piston pump. Hydraulic motor installation | crystal create a hydraulic (certified) | hydraulic motors from Jinan Jing Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) Shandong Jinan, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the crystal creating hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal creating hydraulic better future.