Hydraulic system loop reasonably big impact on whether or not hydraulic engineering machinery energy-saving design. For example, the governor circuit design, avoid the throttle setting at inlet end of the hydraulic system (meter-speed). This will make the system temperature rise, a sharp decline in efficiency, or even failure. In the absence of specific requirements, sales variable pump, generally used in the variable displacement pump - fixed displacement motor, dosing pumps - variable motor or variable pump - variable motor speed control loop of positive displacement, variable pump, due to the characteristics of this circuit is that the temperature rise is small, efficiency high. Volvo's loader hydraulic system uses a load-sensing variable displacement pump, piston pump, can change with different loads and output power, the hydraulic system to avoid the waste of energy. Quantitative pump - cylinder as the main components, the use of the throttle valve Throttling Speed ??Control Circuit which is divided into three working principle analysis, features and applications?. Throttling element placed in different positions in oil on the road, into the meter-speed, outlet throttle control, speed control and two-way bypass throttle throttle speed. Throttle Governing produce oil on the road back to back pressure, smooth, still work at negative load, and import and bypass throttle speed to zero back pressure, poor job stability crystal create a variable hydraulic pump of choice _ _ piston pump is provided by Jinan Jing Chong Hydraulic Machinery Co., Variable pump _ _ crystal create a hydraulic piston pump is preferred Jinan Jing Chong Hydraulic Machinery Co., Ltd. (www.jnjcyy.com) (www.jnjcyy.com) this year introduced a new upgrade, the above picture is for reference only, please dial this Tel pages or pictures on obtain the latest information, contact: Cui.