1.Shield type without leakage 2. Low noise without vibration
3. No corrosion and rust 4.Auto output ,free maintenance

With stainless steel shield housing,compelety separate the water and coil windings, no mechanical seal need,no leakage, with high tensile porcelain bearing and shaft directly water cycle between stator and rotor to cool the system and lubricate the bearing and lower the noise, 30 thousand hours long service life with easy maintenance.