The biggest difference between diesel engine water pump and electric water pump is that they have their own independent power supply system - battery. Therefore, the starting and operation of diesel engine fire pump can be completely disconnected from the mains power.
Diesel engine water pumps are usually used as backup facilities, so they only start automatically when a fire signal comes, and when the electric water pump fails or the power is cut off. When there is a device for starting the pump with ultra-low pressure, the electric water pump control cabinet that is matched with it should also have a device for starting the pump with ultra-low pressure, and the lower limit of the two pumps should have a certain pressure difference. Of course, I can also design a control system that is more suitable for the customer's requirements.
