The lowest % dfr circuit valve is the index valve and will remain in the fully open position 最低% dfr回路阀是指标阀，将保持在全开的位置。
2.
Starting with the most favored branch ( highest % dfr ) each circuit valve will be proportionally balanced to each other 从最容易的分支(最高的% dfr )开始，每个回路阀将会互相按比例平衡。
3.
All other circuit valves ( one at a time ) will be balanced to this index valve % dfr ( this % will change during balancing ) 所有其它回路阀(一次一个)将被平衡到这个指标阀% dfr (在平衡过程中，这个%将随之改变) 。
