丹富斯DFEDRV动态平衡电动调节阀是区别于传统的电动调节阀的新一代产品，是动态平衡与电动调节一体化的产品。DFEDRV动态平衡电动调节阀在系统负荷波动较大的变流量系统中，当系统压力变化时，动态平衡电动调节阀二端的压差（P1-P3）也随之变化：  动态平衡电动调节阀/动态平衡电动调节阀作用
⑴、当进口压力P1升高时，（P1-P2）增大，这时电动阀阀芯向上运动，使P1、P2间开度减少，阀芯压力P2降低；当进口压力P1降低时，（P1-P2）减小，这时电动阀阀芯向下运动，使P1、P2间开度增大，阀芯压力P2升高。因此，无论系统的压力怎样变化，通过电动阀阀芯的调节作用，P2、P3间的压差始终保持不变。因此这种动阀的抗*力强，具有动态平衡的功能；动态平衡电动调节阀/动态平衡电动调节阀作用
⑵、当直行程电动执行器接受控制信号使阀轴延A—B向上下运动（或角行程电动执行器接受控制信号使阀轴延R向旋转）时，P2、P3间的开度也随之变化。由于不管系统压差（P1-P3）如何变化，P2、P3间的压差（P2-P3）始终不变，因此对应于任一开度位置，其输送的水流量都是一定的，并且电动调节阀实际的流量特性曲线与其理想的流量特性曲线是*的，没有偏离。因此这种电动调节阀较传统的电动调节阀具有更好的调节特性。    

产品优点
　　1.稳定：末端设备的流量变化不受系统压力波动的影响，流量变化不相互干扰。 
　　2.节能：较传统的系统节能6-20%
　　3.高效：大大地缩短了调试时间，系统运行具有高效率。 
产品特点
　　1.驱动器为直行程，互换性好。 
　　2.流量特性曲线：直线/等百分比
　　3.流量误差≤5%
　　4.工作温度：0--100℃

具有优良的电动调节功能：电动调节功能是指阀门能根据目标区域温度控制信号的变化自动的调节阀门的开度，从而改变水流量，zui终使目标区域的实际温度与设定温度*。评价电动调节功能好坏的是电动调节阀的流量特性曲线。在空调系统中，常用的电动调节阀的理想流量特性曲线是直线的或者等百分比的。但是对于一般的电动调节阀，在实际使用过程中由于阀权度较小，使得实际的流量特性曲线偏离理想的流量特性曲线。如图3，某电动调节阀理想的流量特性曲线是直线型（曲线1），但是在安装到系统管路上后实际的流量特性曲线接近快开型（曲线2），调节特性变差。动态平衡电动调节阀由于*的阀体结构，在实际的使用工程中阀权度基本为1，因此其实际的流量特性曲线与理想的流量特性曲线*（如图4），没有偏离，因此具有优良的电动调节功能。

Dan fuss DFDFEDRV dynamic balance of electric control valve is different from traditional electric regulating valve of a new generation of products, product of the integration of dynamic balance and electric adjustment is. DFEDRV dynamic balance of electric control valve in the system load volatile variable flow system, when the system pressure change, on the dynamic balance of electric control valve two differential pressure (P1, P3) changes: 
(1), when the inlet pressure P1 rises, (P1, P2) increases, the electric valve core upward movement, reduce the opening between P1 and P2, valve core pressure P2 lower; Fall, when the inlet pressure P1, (P1, P2) decreases, and the electric valve core movement down, make between P1 and P2 opening increases, the valve core pressure P2. Therefore, no matter what the pressure of the system changes, by regulating the function of electric valve core, pressure difference between P2 and P3 always remain the same. So the dynamic valve anti-interference ability is strong, has the function of dynamic balance; 
Diction, when straight travel electric actuator control signal makes the valve shaft extending A - B from moving up and down (or Angle travel electric actuators to accept control signal delay R to make the valve shaft rotation), P2, P3, the opening between the changed also. Because regardless of system pressure difference (P1, P3) change, P2, P3, the pressure difference between the (P2, P3) is always the same, so the corresponding to any opening position, its conveying water flow is certain, and real flow characteristic curve of the electric control valve and its ideal flow characteristic curve is consistent, without deviation. Therefore, the electric regulator than traditional electric regulator has better regulation characteristics. 
 
Product advantages 
1. Stability: equipment at the end of the flow rate change is not affected by the system pressure fluctuations, changing flow does not interfere with each other. 
2. Energy saving: 6-20% compared with the traditional system energy conservation 
3. Efficient: is greatly shortened the time debugging, system running with high efficiency. 
Product features 
1. The drive for straight travel, good interchangeability. 
2. The flow characteristic curve, linear/percentage, etc 
3. The flow rate error of 5% or less 
4. Working temperature: 0-100 ℃ 
 
Control function: with excellent electric power regulating function refers to the valve can be according to the target area for temperature control signal changes automatically adjust the opening of the valve, so as to change the water flow, eventually make the target area in the same temperature and set temperature. Evaluation of electric regulating function is stand or fall of electric control valve flow characteristic curve. Commonly used in air conditioning systems, electric regulating valve the ideal flow characteristic curve is linear or equal percentage. But for the general electric control valve, in actual use process due to the smaller valve power degree, makes the actual flow characteristic curve deviates from the ideal flow characteristic curve. As shown in figure 3, an electric regulating valve the ideal flow characteristic curve is linear (curve 1), but the actual after installed to the system piping flow characteristic curve (curve 2) close to the quick opening type, regulating characteristics. Dynamic balance of electric control valve because of its unique structure of valve body, valve in the use of actual engineering degree of basic to 1, so the actual flow characteristic curve are consistent with the ideal flow characteristic curve (as shown in figure 4), no deviation, so it has excellent electric regulating function. 

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