1. Pump shaft is changed from dynamic seal to closed static seal, which completely avoids medium leakage. 2. No independent lubrication and cooling water are needed to reduce energy consumption.
3. From coupling drive to synchronous drive, there is no contact and friction. It has low power consumption, high efficiency and damping effect, which reduces the impact of motor vibration on the pump and the impact of pump cavitation vibration on the motor.
4. When overload occurs, the internal and external magnetic rotors slip off relatively, which can protect the motor and pump.