Running conditions of parallel-connected variable and constantspeed pump are discussed using pump performance curve, and the correct switch steps are pointed out.
利用特性曲线对变速泵与定速泵并联运行工况进行了讨论，指出其正确切换步骤。
2
In general, a double cylinder single acting piston pumps rotates at a constantspeed, this results in considerable fluctuation in the flow curve.
通常双缸单作用活塞泵的恒转速运行会导致管路流量波动，使之在恒流量场合较少应用。
3
During the constantspeed operation, the motor could be smoothly in a natural characteristic curve and would have a full new function of the stepless stable speed regulation.