Circulation pump with long life, low noise, no leakage, enviroment protection, passed CE, ISO9000. 1.Working conditions ... research personnel of our company has following merits:no leakage ,low noise, enviromental protection, beautiful appearance,convient installation,run responsible and so ... and keep warm in cycle,etc.4. Technical data:Flow: 8 m3/hHead: 11mPower: 400 wCurrent: 2.5 AVoltage: 220Vin/ ...