Constant pressure valve is turned on variable displacement pump care - pressure oil into the piston chamber variable variable pump repairs - Phone, variable piston pressure in the lowest position, full displacement pump output pressure oil; it is set when the pump is constant pressure to work , acting on the hydraulic thrust is equal to the constant pressure valve it is set spring force, the constant pressure valve The oil discharge port is on the same time, the variable hydraulic thrust of the piston is equal to the upper and lower chambers, a variable balanced position in the piston If the hydraulic damping (load) increased transiently increased variable hydraulic pump, constant pressure valve drain port open big, oil inlet off small, relatively lower chamber pressure variable piston upper chamber reduced variable piston moves upward, the pump flow decreases, until the pressure drops to the constant pressure it is set, then the new equilibrium position variable working piston. Conversely, if the hydraulic damping (load) decreases, hydraulic transient drop, constant oil inlet valve to open big, drain port off small, variable on relatively lower chamber hydraulic piston chamber increases, variable piston moves down, the pump The flow rate increases, the pressure rises until it is set to a constant pressure. Constant variable pump reaches the set pressure in the pump body before starting level variables, then flow into a steep decline line decreased. Constant power variable pump is almost full pressure phase are variable, constant output power basic guarantee within a certain range , but within the range of the pump set power, pressure rises, the flow is full flow output, when more than this pressure, the flow rate begins to drop, in order to ensure a constant output power (which means that below the rated power, power is not actually used Constant's) as well as electronically controlled variable displacement pump variable pump finishing - it's part of the electronically controlled variable curve by the decision, regardless of the actual pressure, regardless of the power to match the motor and pump, the pump must be considered variable. The Training - variable pump, hydraulic from Jinan Jing Jing Chong Chong Hydraulic Machinery Limited. Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) strong, credible, in Jinan, Shandong mining machinery industry has accumulated a large number of loyal customers. The company better work attitude and continuous improvement to create innovative ideas will lead crystal hydraulic and you hand into the brilliant, for a better future!