The metering charge mainly uses three ways to save energy: firstly, the flow regulating valve is installed to achieve the flow balance, which overcomes the uneven heat and cold phenomenon. Secondly, through the role of the temper…

1. The pump does not turn when starting. Cause: The packing is too tight or the impeller and the pump body are stuck by the debris; the pump shaft, the bearing and the leakage ring are rusted; the pump shaft is severely bent. Rem…