The ZQB series submersible axial flow pumps are specifically designed for high flow rates and low lift applications. These submersible axial flow pumps are typically used with a head of 10 meters or less. This product is a comprehensive alternative to traditional axial flow pumps, featuring an integrated motor and pump unit that operates submerged in water, offering a range of advantages unmatched by conventional units. In agriculture, it is used for irrigation and drainage; in urban settings, for stormwater and light wastewater drainage; in industry, for water supply, cooling water, and raw water supply; and in hydraulic engineering. Suitable for conveying clear water or light wastewater. The nominal outlet pipe diameters available are 350, 500, 600, 700, 800, 900, 1000, 1200, 1400, 1600, and 1800mm.

Due to the integrated design of the motor and pump, there's no need for labor-intensive, time-consuming, and complex alignment procedures on-site. Installation is convenient and quick, allowing for the elimination of a备用泵 storage space, and instead, storing the spare pump in the warehouse, thereby saving investment in the pump station's intake pool. The submerged operation greatly simplifies the pump station and building structure, reducing installation area, and can save up to 30-40% of the total pump station construction cost. The pump operates with water flowing around the motor, resulting in low noise and excellent cooling conditions for the motor. It can be built as an underground pump station, preserving the ground's environmental aesthetics. Using submersible electric pumps is a more thorough method for addressing pump station and flood control issues in areas with significant water level fluctuations along rivers and lakes, eliminating the need for long shafts between the motor and pump, and enhancing operational safety and reliability.

The impeller is designed using the current superior hydraulic model, ensuring excellent, stable, and mature performance. A smaller nD value is chosen for better cavitation resistance, ensuring smooth operation. Two independent mechanical seals isolate the motor from the pump, with a serial installation from top to bottom, providing multiple safety measures and enhancing reliability. The oil chamber uses oil for lubrication and cooling, acting as an insulator between the motor and the medium being pumped. The reserved volume inside can mitigate the increase in oil chamber pressure. During the initial startup, the reactive torque of the motor's starting torque can cause the unit to rotate in the opposite direction; the anti-rotation device addresses this issue. The bearings use rolling bearings to withstand all axial and radial loads and are separated from the medium pumped by the pump. The pump and motor are coaxial, with a compact structure, minimizing shaft extension, reducing deflection in design, resulting in less vibration during operation, and extending the lifespan of the seals and bearings. The high-performance squirrel-cage induction motor is specifically designed and manufactured for submersible pumps, complying with GB755 standards. The insulation level is F-class, with a higher operating temperature up to 135°C. Depending on the power rating, voltages of 380V, 660V, 3KV, 6KV, and 10KV can be used; for high-voltage motors, a double VPI insulation process is employed to ensure reliable insulation. The motor housing directly transfers heat to the surrounding medium, which is carried away by the water flow. High-power, high-voltage motors use internal air duct cooling technology, resulting in lower temperature rise of the three-phase winding and uniform temperature distribution. The submersible pump is equipped with multiple protection devices that can lead the wiring to the electrical control box. These protection devices include overload, phase loss, leakage, overtemperature, humidity, and water immersion protection (differences may occur depending on the pump's structure).

The QZ series submersible axial flow pumps typically feature an open impeller inlet and are installed in a suspended manner, steel well casing installation, or precast concrete well casing installation. The suspended and steel well casing installations provide complete well casings, while the precast concrete well casing installation includes an installation base (with anti-rotation device) and well cover assembly. Larger submersible pumps (generally with impeller diameters over 1 meter)