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QJ series submersible deep-well pump is new type high grade product developed and produced based on the American, Italy advanced electric pumping technology. Main parts adopt stainless steel, copper alloy, make the pump high efficiency, energy-saving, wear resistance, rust and pollution resistance, good appearance, convenient installation. Especially suitable for factories, colleges, industrial and civil, irrigation and extraction of groundwater.
Product Range
1. 4" Submersible pump, The impellers and the diffusers are in plastic material(noryl),whereas the bearings are in ceramic/rubber lubricated by the water circulation.Check valve is incorporated in the delivery body with threaded outlet.The coupling Pump-motor is according to NEMA regulations.
2. 6"、8" Submersible pump, The impellers and the diffusers are in grey cast iron, (on request, the impellers can be supplied in bronze), whereas the bearings are in ceramic/rubber lubricated by the water circulation. Check valve is incorporated in the delivery body with threaded outlet (on request , it can be supplied flanged). The coupling Pump-motor is according to NEMA regulations.
3. 4"、6" Stainless steel submersible pump, the pump caising/impeller is made of stainless steel 304, 316. 
During the daily use of the self-priming pump, there will be some more common problems. For example, the self-priming pump's non-pumping problem will be caused by many different reasons, so how do we deal with these problems is the key. The reasons why the self-priming pump does not pump water include the following aspects.
The hot water submersible pump is used for hot spring bathing, and can also be used for extracting groundwater from deep wells, and can also be used for water lifting projects such as rivers, reservoirs, and canals. It is mainly used for farmland irrigation and human and animal water in high mountain areas. It can also be used for central air conditioning cooling, heat pump units, cold pump units, cities, factories, railways, mines, and construction site drainage. The general flow rate can reach 5~650m³/h, and the head can reach 10-550 meters.
Diaphragm pump is a new type of conveying machinery that can convey various corrosive liquids, liquids with particles, high viscosity, volatile, flammable, and highly toxic liquids. Diaphragm pump has four materials: plastic, aluminum alloy, cast iron, stainless steel.
