The amount of valve anti-tank. When a loop, the load should a feedback signal LS (i.e. load), these two quantities are added together (LS with the spring force and), and if the pressure exceeds the high pressure oil pump, the three-way flow valve pushed up, so that the flow through the three-way flow valve is reduced. 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 depends only on the size of the spring force (variable pump) Specialist, unaffected by the load. Under the same pressure, the greater the area of ??the orifice, the greater the flow. 1. In order to reliably suction pump variable vane pump, its speed must be in the range of 500 ~ 1500r / min, and when the speed is too low (variable pump) and maintenance, the blade can not be pressed against the inner surface of the stator and an oil; high speed is caused by Pump "sucked empty" phenomenon, the pump is not working properly. To choose the appropriate viscosity of the oil, the viscosity is too large, oil resistance increases; the oil is too thin, the gap affects the degree of vacuum is not enough (variable pump) care, the suction will cause adverse effects. 2. vane pump for oil is very sensitive to dirt, poor reliability, oil will clear the blade stuck, so you must pay attention to the good oil filter and clean environment. 3. Because of the vane pump mounting inclination, it only allows unidirectional rotation of the rotor should not be used in reverse, otherwise it would break the blade. (Variable pump) Care | crystal create a hydraulic (certified) | Variable pump provided by Jinan Jing Chong Hydraulic Machinery Co., Ltd .. 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.