The Yinhong QJ cast-iron deep-well pump series (including models such as 125QJ, 150QJ, 175QJ, 200QJ, 250QJ, and 300QJ) is high-efficiency water-lifting equipment designed specifically for extracting water from deep wells.
Customization is available to meet specific needs (options include all-stainless steel 316/304 construction, hot-water pumps for temperatures up to 200°C, and pumps for shallow-water applications).
I. Structural Design Advantages
Features an integrated, direct-coupled motor and pump design; the entire unit operates submerged, offering a compact structure and easy installation and maintenance.
Constructed from high-strength cast iron, providing both corrosion and wear resistance; particularly suitable for water sources with high sand content.
Utilizes a multi-stage centrifugal impeller structure; the 175QJ model offers a head of up to 500 meters, while the 300QJ model delivers a maximum flow rate of 300 m³/h.
II. Performance Parameters and Features
Wide flow rate range:
125QJ Series: 5–32 m³/h
150QJ Series: 5–63 m³/h
175QJ Series: 5–50 m³/h
200QJ Series: 20–100 m³/h
250QJ Series: 40–240 m³/h
300QJ Series: 100–370 m³/h
Compatible with various well diameters:
125QJ model fits a minimum well diameter of 125 mm. The 300QJ unit has a maximum outer diameter of 184 mm.
It operates at a stable speed of 2850–2920 rpm, with compatible motor power options ranging from 3 kW to 185 kW.
III. Application Characteristics
Agricultural sector: Meets water requirements for farmland irrigation and sprinkler systems; the 175QJ model is particularly suitable for irrigating large crop areas.
Industrial sector: Models 200QJ and above are suitable for industrial applications such as mine dewatering and petrochemical processing; the 250QJ model offers a maximum single-unit flow rate of 240 m³/h.
Civil sector: The 150QJ series is suitable for rural well-water supply, while the 300QJ series provides stable water pressure for high-rise buildings.
IV. Operational and Maintenance Advantages
No special requirements for well casings; standard water delivery pipes suffice to meet pressure needs.
No need to construct a dedicated pump house, saving on infrastructure costs.
Features a sand-resistant seal design to extend bearing service life.
This product series utilizes a modular design to offer a wide range of models, forming a comprehensive lineup from 150QJ to 300QJ; users can select the appropriate model based on actual well depth (50–600 meters) and flow rate requirements. Notably, the 200QJ series—with a flow range of 20–80 m³/h and a head range of 10–400 meters—has become the flagship model with the highest market demand. All models are equipped with overheat protection devices to ensure reliability during prolonged, continuous operation.



















