Products overview Sqj, sqs, sqy, series submersible pumps widely used in farmland irrigation, spray irrigation and water-use, industrial and civil buildings, also the drainage system to level hills, mountain diversion and in low-lying areas dunes, urban and rural mining supply, drainage and other water conservancy facilities. Characteristics are that they are assembled into a simple structure they have installation convenience a small footprint, simple maintenance and a safe reliable operation. Product use conditions: 1.380 v bias voltage does not exceed +/-10% and 50 hz frequency, and the deviation is not more than + -1% of the three-phase power supply. 2.Electrical cavity must be filled with water during operation. 3.The first-class pump impeller should at least go into a dynamic water level 2 m below surface. Static pump unit immersed under water shall not be greater than 70 m in depth. 4.The normal water temperature should be no higher than 20 ° c, qjr- hot water pump temperature up to 80 ° c. 5.Water and sand content (by mass) of not more than 0.01%. 6.Water ph 6.5-8.5. 7.The hydrogen sulfide in water content is not more than 1.5 mg / l.