QZ series submersible axial flow pump is a new generation of submersible axial flow pump products independently developed by our company,it is not only simple in structure,easy to disassemble and assemble,but also has excellent performance as an alternative to traditional axial flow pump.
This QZ series of products has a wide spectrum,good hydraulic performance and novel structure.it is characterized by high efficiency,good cavitation performance,easy installation and maintenance,at the same time,combined with the latest information control technology,the intelligent water pump system independently developed can be configured,with automatic monitoring function.
The design,manufacture,and quality of this series product meet the standard of GB/T13008 Technical conditions for mixed-flow pump and axial-flow pump,JB/TLarge and medium-sized submersible motor-pumps
This series of products can be used for clear water or other liquids with physical and chemical properties close to water whose temperature of conveying medium is no more than 43ºC. They are widely used in municipal engineering, large-scale water conservancy projects, farmland irrigation,industrial conveying water.The thermal power station car-ries circulating water.Shipyard level,urban water supply and drainage and water diversion projects
Performance Parameters Table
| Model |
Capacity(L/s) |
Installation angle |
Head(m) |
Pump efficiency (%) |
Shaft power (kW) |
Speed(rpm) |
Impeller outer diameter(mm) |
| 250QZ-125 |
576 |
-6 |
2 |
81.5 |
3.9 |
1460 |
250 |
| 611 |
-4 |
2.2 |
81.8 |
4.6 |
| 669 |
-2 |
2.4 |
82.6 |
5.3 |
| 760 |
0 |
2.4 |
83.1 |
5.9 |
| 804 |
2 |
2.5 |
83.3 |
6.7 |
| 853 |
4 |
2.7 |
82.1 |
7.5 |
| Attributes |
Attributes |
Attribute value |
| Material |
Machinery Seal |
Import/Domestic |
| Bearing |
Import/Domestic |
| Diffuser |
Standard HT250,Optional |
| Connector |
Standard A2-70,Optional |
| Mineshaft |
Standard Q235-B,Optional |
| Pump case |
Standard Q235-B,Optional |
| Impeller chamber |
Standard HT250,Optional |
| Wheel hub |
Standard HT250,Optional |
| Impeller |
Standard ZG07Cr19Ni10,Optional |
| Working conditions |
Medium temperature(ºC) |
≤42ºC |
| Rated voltage |
380V/660V/3KV/6KV/10KV |
| Frequency(Hz) |
50Hz |
| Start method |
Soft start or frequency conversion |
| Direction of rotation |
From the drive end,the pump is rotated in clockwise |
| Installation |
Structure type |
Standard |
| Installation method |
Standard steel wellbore, optional concrete wellbore |
| Wellbore Diameter(mm) |
700 |
| Outlet diameter of outlet elbow(mm) |
400 |
| Flange grade |
0.6MPa |
| Motor |
Control cable |
Submersible pump special cable 10m |
| Power cable |
Submersible pump special cable 10m |
| Iron core |
Cast aluminum (low pressure) / copper bar (high pressure) |
| Stator |
Silicon steel sheet + copper |
| Shaft |
Standard 2Cr13,Optional |
| Junction Box |
Standard HT250,Optional |
| Motor housing |
Standard HT250,Optional |
| Package |
Pump weight(kg) |
700 |
| Optional accessories |
Optional accessories |
Outlet matching flange, terminal box, electric control cabinet |
High-efficiency energy saving: the hydraulic model is designed by 3-D flow theory and calculated by CFD computational simulation,with the best performance in theory. Hydraulic components are made of metal mold,cast precisely guide blade mould is machined by CNC;guide blade shell and suction cone blank are cast by resin sand,solid flow channel is completely in accordance with design drawings,with efficiency higher, and wide high efficiency zone
High reliability:the design of the inlet flow channel is reasonable, the inlet water is uniform without vortex, with smooth running, the absolute concentricity o the pump shaft, and the excellent static balance of the rotor parts ensure that the pump has low vibration and low noise when running at high speed
Advanced technology:all parts using metal mold,precision casting,parts quality is reliable
Low maintenance: reasonable structure,convenient assembly and disassembly, and simple maintenance
Inventory management: reasonable inventory management,short lead time,fast delivery
Automatic monitoring: Equipped with intelligent water pump system independently developed,with automatic monitoring function
1.Special submersible motor
The whole series of F/H grade insulation,B grade temperature rise assessment, protection grade is IP68;the motor has low energy consumption, low temperature rise, and high stability.It has better heat resistance and longer life than ordinary motors.The wiring cavity is sealed from the stator and rotor of the motor, with double insurance.The motor bearing adopts the auxiliary oil tank structure to increase the service life of the bearing.
2.Motor pump protection system
The motor has a number of built-in warning sensors,including the leakage in the wiring chamber,the motor cavity and the oil chamber, and the temperature rise of the bearding and the motor coil. The motor is equipped with water leakage monitoring,and the oil chamber is equipped with oil mixed water probes.There is comprehensive monitoring of motor operating conditions.
3.Hydrodynamic parts
The 3-D flow theory design and CFD computational simulation are adopted,with high efficiency and wide high-efficiency zone, and good cavitation performance;
Independently developed hydraulic model,high efficiency area is wide
Adopt metal mould, precision casting
4.Cable locking sealing system
The cable outlet adopts special structure,which eliminates water leakage, electricity leakage,short circuit,and stator coil burnout caused by accidental factors such as artificial pulling,broken cable jacket, and cable aging,which effectively reduces the probability of failure caused by water in the upper part of the whole machine
5.Bearings
At the pump end is equipped with a thrust spherical roller bearings(the oil lubrication),withstand the axial thrust of pump,There are one cylindrical roller bearding and one deep groove ball bearing(grease lubrication)equipped with the top and bottom of the motor, withstand the radial force of rotor.The bearing running stable,and the motor shaft will not movement,so the bearing has little heat and no noise during the operation of the pump
5.Sealing system
The product applies a patented structure, the pump end adopts a combined double cartridge mechanical seal,and the motor side also adopts a single end mechanical seal.The structure makes the sealing performance of the pump reliable and running stable.
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