Flow pump is mainly used for construction machinery such devices on one engine, to take full advantage of its power. The hydraulic system can be high flow, high pressure low flow at low pressures. This is similar to the upper surface of the constant pressure pump, it is not. Constant power pump when the pressure flow changes, follow the Constant Power Pump spot, but not before reaching constant pressure pump in the setting value, the maximum displacement of the dosing pumps, constant power began inflection point does not exist. And after entering the constant conditions, in principle, while maintaining the pressure needed to provide the flow of the system. The amount of valve anti-tank. When a circuit, the load should a LS feedback signal (ie load) variable pump repair, these two quantities are added together (LS and the spring force and), if the pressure exceeds the high pressure oil pump piston variable pump v38, three-way flow valve will push upward so reduce the flow through the three-way flow valve. Flow to the load increases. Excess flow through the three-way flow valve back into the tank. Keep both ends of the orifice flow through the three-way valve pressure constant. Throttle pressure differential only depends on the size of the spring force, is not affected by the load. Under the same pressure, the greater the area of ??the orifice, the greater the flow. Troubleshooting: Unloading at 20bar pressure is always above, this may be due to the three-way flow valve is fully open, you should check whether the three-way flow valve spool movement flexible variable pump, if necessary, replace the valve, including the damping; systems always reach a predetermined pressure value, the leakage may be three-way flow control valve is too large. Then we must replace three-way flow control valve piston or connecting blocks. Sales of variable pump | Hydraulic crystal create credibility first (certified) | Variable pump 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 to create a hydraulic leadership with the staff warmly welcome all inquiries negotiations to create the crystal to create a better future for the hydraulic.