... No need to add any chemicals, stable pure water quality, and no pollution drained, low produce cost ... Power: 380V/50Hz or by Diesel Generator Pretreated Water:1. Mutimedia Filters: 58tons/hour per set ... Electrolytic Conductivity: <0.2μs/cm 3. Water Hardness: ≈0 Certificates:JB2932-1999, SDDZ037-87, DL519- ... No need to add any chemicals, stable pure water quality, and no pollution drained, low produce cost ...