The QZ-type high-flow submersible axial-flow pump is an upgraded, next-generation replacement for conventional split-unit pumps. The motor driving the pump is a dry-type, fully enclosed, three-phase asynchronous submersible motor. In this unit, the pump and motor are integrated on the same shaft, allowing the entire assembly to operate continuously submerged in water for extended periods. It boasts a series of advantages that are unmatched by conventional pump units.

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+86 0731-88632200

classification：

Axial-flow pump

keyword：

Horizontal Single-Stage Fire Pump

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Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

The QZ-type submersible axial-flow pump is an upgraded, next-generation replacement for conventional split-unit pumping systems. The motor driving the pump is a dry-type, fully enclosed, three-phase asynchronous submersible motor. In this integrated unit, the pump and motor are coaxially coupled and can operate continuously submerged in water, offering a host of advantages that traditional units simply cannot match. Since the pump and motor are integrated and both are submerged together, there’s no longer any need to perform the labor-intensive and time-consuming alignment procedure required when assembling the pump and motor shafts on-site—making on-site installation both convenient and rapid. Moreover, because the electric pump operates submerged in water, the civil engineering structure of the pump station can be significantly simplified, reducing the installation footprint and cutting the overall construction costs of the pump station by 30% to 40%. When the electric pump operates submerged, it generates much lower noise levels, provides excellent cooling conditions for the motor, and ensures that the pump station remains free from high temperatures and noise disturbances, thereby greatly improving the working environment within the station. At the same time, it allows for the construction of entirely underground pump stations as needed, preserving the aesthetic appearance of the surrounding ground surface. In terms of operation, the unit is highly flexible: it can be started and stopped at any time without requiring pre-operation lubrication of the pump’s rubber bearings. Remote control and automatic operation are also easily achievable. The unit is easy to disassemble and maintain. Adopting this unit represents an ideal solution for addressing flood-control challenges in areas along rivers and lakes where water levels fluctuate dramatically, eliminating the need for a long shaft between the pump and motor and significantly enhancing operational safety and reliability.

QZ-type high-flow submersible axial-flow pump

Product Parameters

Operating Conditions for QZ-Type High-Flow Submersible Axial-Flow Pumps

· Power supply: 3-phase AC power supply, 50 Hz, 380 V.

· The water temperature should not exceed 40℃.

· The pH value of water should be within the range of 5.5 to 8.5.

· The electric pump must be fully submerged in water, with a submergence depth of no less than 0.8 meters.

Application Areas and Advantages of the QZ High-Flow Submersible Axial-Flow Pump

1. Submersible axial-flow pumps are suitable for irrigation and drainage pumping stations and hydraulic engineering projects. They feature large flow rates, low head, high efficiency, and energy savings.

2. The motor adopts the YE3 high-efficiency series that meets national standards; it is directly connected to the pump components via mechanical seals and sealing rings, ensuring a longer service life for the entire unit.

3. Depending on the water quality and environmental conditions, impeller and shaft materials can be optionally selected. This product is widely used in pump station projects related to seawater aquaculture, agricultural irrigation, drainage and drought resistance, urban water supply, and stormwater and wastewater treatment!

(1) Agricultural irrigation and drainage;

(2) Municipal stormwater and lightly polluted wastewater;

(3) Process water and cooling water in industry;

(4) Water diversion projects in water conservancy.

Model Description for QZ High-Flow Submersible Axial-Flow Pump

QZ Type Submersible Axial Flow Pump Model Description

Structural Description of the QZ Type High-Flow Submersible Axial-Flow Pump

Structural Diagram of QZ Type Submersible Axial-Flow Pump

The QZ-type submersible axial-flow pump consists of four major components: the inlet bellmouth, the impeller housing, and the guide vane assembly.

The submersible motor is a fully sealed, dry-type asynchronous motor. The motor casing completely encloses the motor unit. At the cable outlet on the upper end of the motor, there is a static sealing device; at the shaft outlet on the lower end cover, there is a rotating sealing device. This submersible motor boasts all the safety and reliability features required for submersible operation. It is equipped with detection, alarm, and protection devices for both seal leakage and temperature rises in the windings and bearings. Early-stage leakage—without affecting normal motor operation—is detected only by an alarm. When the winding temperature exceeds 135°C or the bearing temperature exceeds 90°C, the motor is automatically de-energized for protection. All protective devices are monitored by a dedicated protector specifically designed for submersible pumps, ensuring the safe operation of the pump.

Main features of the QZ-type high-flow submersible axial-flow pump

In addition to maintaining essentially the same application scenarios, inlet and outlet water conditions, and characteristic parameters as conventional long-shaft pumps, submersible axial-flow pumps offer the following notable advantages:

The total investment in the pumping station project has been reduced by more than 30%.

Construction period reduced by more than 40%;

The installation time for the crew has been reduced by more than 95%.

The crew weight has been reduced by more than 50%.

Eliminate the investment in flood-control walls for pump stations;

Low maintenance costs;

No operational noise, simple operation, and easy to automate;

The low height of the above-ground structure allows for the elimination of a pump house building, and it’s even possible to construct the pump station below ground level.

Friendly reminder: For more performance parameters of the QZ-type high-flow submersible axial-flow pump, please click → [Water Pump Selection] Page query

Why choose us?

Changsha Zhonghlian Pump Industry Co., Ltd. was founded in 1989 and was independently established after the restructuring of Changsha Water Pump Factory. It is a comprehensive national high-tech enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Equity Exchange on December 31, 2019, with the abbreviation "Zhonghlian Pump Industry" and the equity code: 600275HN. It is currently a key backbone enterprise in China's centrifugal pump industry and one of the major professional manufacturers of multi-stage pumps in the country. The headquarters is located in Changsha City, Hunan Province, a historical and cultural city in China.

41000 m²

Square meters of land area

100 %

100% factory pass rate

41000 m²

Square meters of land area

100 %

100% factory pass rate

What is your typical delivery time?

Models in stock can be shipped the next day at the latest. All others are custom-made, with lead times generally ranging from 7 to 90 days depending on the product size and project specifics. Please contact our sales manager for details: 0731-88632200 。

Do you have centrifugal pumps in stock?

Centrifugal pumps come in numerous models and configurations. Except for a small number of high-volume, standard models that are in stock, the vast majority are not stocked and are customized products. We need to select a pump based on your site's flow rate, head, media temperature, pH value, and installation conditions, etc., to determine the pump model and configuration before we can submit an order to the factory for production.

What information should I provide when requesting a quote?

Generally, to obtain an accurate quotation, we recommend providing us with the following information: pump flow rate, head, on-site operating voltage and frequency, temperature, pH value, and solid particle content of the fluid being conveyed, and on-site installation conditions (horizontal or vertical installation), etc.

If you are not sure, don't worry, our business managers will assist you in determining this.

What products do you mainly produce?

Zhonglian Pump Industry manufactures various large industrial centrifugal pumps. Main products include: self-balancing multi-stage pumps, multi-stage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condensate pumps, etc.

Could you help me with the selection?

Certainly! If the water pump model is not selected accurately, there will be big problems. If you choose a smaller one, it won't meet your needs; if you choose a larger one, it will waste electricity and fuel, increasing your costs.

Why is it so slow to get a price quote?

Because centrifugal pumps are non-standard customized products with many models, the price range is also very large. Even for the same model, the price difference is also very large due to different materials and configurations. Taking the most common water pump accessory—the impeller—as an example, the price of a stainless steel impeller is several times that of a cast iron impeller. Therefore, we need to clarify the relevant information to give you an accurate price. Normally, if you provide relatively comprehensive information, we can quote within 5 minutes.

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HZ Horizontal Chemical Axial Flow Pump

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HZ Horizontal Chemical Axial Flow Pump

+86 0731-88632200

Export Trade/Technical Support:

+86 153-4831-2290

Head Office Email:

zoomlian@yeah.net

No. 210, Huanbao Zhong Road, Yuhua District, Changsha City, Hunan Province, Leowoju Wisdom Valley Building B, 8th Floor

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