The number of operating speed change parallel pump：
Unable to control the parallel pumps, using input using the number of pumps in combination with fan coil system of changes in water availability. Because it is used to stop units to regulate the flow, so the regulation of echelon rarely, ladder asked greatly, and the fan coil system adaptability to the changes in water supply is relatively poor. The non speed adjusting multi pump parallel form is to use a form of the most widely, while changing the pump operation units to regulate the flow of the mode of operation is not very convenient, adaptability is relatively poor, but the application of well, the energy saving effect is very obvious. With respect to the speed regulation mode, this kind of adjustment way to the operation management personnel technical level and the operation skill request higher some.
