Starting method of burner cooling water pump

Why? Most of the soft starters are designed by design institutes.

We also prefer hard starting here; since it is a centrifugal pump, the inlet valve is usually kept slightly open or completely closed at the time of startup, and the outlet valve is gradually opened after the pump has started up. This approach causes no significant damage to the motor, so there is no need to use soft starting. Hard starting is also known as mains-frequency starting, while soft starting is referred to as variable-frequency starting. By changing the frequency of the motor, its speed can be adjusted gradually until it reaches the rated operating condition; this helps to reduce the impact forces resulting from excessive power consumption during sudden startup. Soft starting is usually achieved using a frequency converter. The sludge pump we use here does indeed employ a frequency converter, as the medium involved is quite dirty. Ball valves are used at the outlet, and during startup these valves are generally kept fully open. Flow rates are adjusted by changing the frequency, thereby preventing the valves from remaining in a partially open state, which would accelerate their wear.