Application: machinery and equipment for pumps, long-term circulation pump, iron and steel industry wastewater treatment, river sewage, engineering drainage, Any other industrial wastewater treatment...etc. Construction pumps series (50HZ): 1. Output: 0.5HP~20HP 2. Discharge: 2"~8" (inch) 3. Phase: 1? 220V / 3? 4. Capacity: 0.2~6.0 (m3/min) 5. Head: 5~38 (m) Features: 1. Dry-type model with overload protector is built-in to protect motor from overheat and overload. 2. Inner cable wires and cable base are upgraded by filling EPOXY to raise humidity-resistance. 3. Motor frame and casing are made of stainless steel and water-cooling jacket design increases efficiency of heat diffusion. 4. Stainless steel shaft is calibrated in dynamic balance test. Dual mechanical seal SIC/SIC are fitted and dual oil seals design raises effects of dust-proof. 5. Impeller and agitator are made of high chrome alloy steel (HCR, 3hp, above), high wear resistance, and calibrated by dynamic balance test. 6. Pump housing and stress eliminating plate are made of wear-resistant and malleable cast iron, and stress eliminating design is adopted between pump housing and mechanical seal lid to reduce flow stress. 7. SONHO is a professional water pump factory focusing on design, development and production for construction dewatering pump and construction submersible pump.