"Material requirements: - anti-corrosion - stainless steel - cast iron, brand: - South - South Pump - Huiye - Dongfang - Grundfos, Kenfulai, pump type: - Centrifugal pump - Pipeline pump - Circulation pump - Diaphragm pump - Lifting pump, parameters and flow requirements: - Head - Power - Constant frequency - Variable frequency - Energy efficiency level - In and out diameter - Motor voltage"