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 in the pump set power range, variable pump pressure rises, the whole flow of the output variable flow pumps specializing *, when more than this pressure, flow rate began to decline, in order to ensure a constant output power (which is to say less than rated When the power, the actual use of power is not constant). There are electronically controlled variable displacement pump, its electronically controlled variable part of the curve by the decision, regardless of the actual pressure. No matter what, the motor and the pump power matching variable pump finishing * must be considered. For a lot of pressure changes, way too much, but the last to be considered together with the flow changes. For example, the multi-stage pressure switch, electro-hydraulic proportional valve, proportional pressure pumps, plus turbocharger, plus electric high-pressure pump as a booster (these two are local booster) variable pump repair phone *, and so on. 5) with constant pressure does not change, but the change of flow conditions; constant power with all changes in pressure and flow, but the same power condition .6) governor, there are two options: First, the pump motor control system ; a valve-controlled motor system. The former program are: a quantitative variable motor pump + 2 variable displacement pump (inverter motor + dosing pumps) + quantitative variable pump motor maintenance * | 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!