介绍了轴向旁通压力平衡式补偿器在热网应用，并和其它方案进行了比较，认为该方案并非好方案。
Comparing with other programs, the author also does not believe that the program of applying axial bypass compensator for pressure balance on the pipeline is a good way.
SPRD旁通阀是当各种区域风门自动关闭时用在区域系统中，可以在管道系统中增加空气压力盒速度。
The SPRD is used on zone systems when the automatic closing of various zone dampers can create an excessive increase in air pressure and velocity throughout the duct system.
容易实现用旁通控制在恒定转速下的压力，但旁通浪费能量。
By-passing to control the pressure at a constant speed is easily accomplished, but it wastes power.
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