Changsha Zhonglian Pump Industry Co., Ltd.

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Having 26 series -312 varieties - over 1000 pump models

Focused on water pump research and development manufacturing for 36 years

Free training for operation and maintenance personnel/free installation guidance/free provision of installation drawings

Self-balancing multistage pump

Multistage pump

Coal Mine Safety Certified Multi-stage Pump

Vertical multistage pump

Integrated pump station

Vacuum pump

Fire pump

Constant-pressure water supply equipment

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Stainless steel multistage submersible deep well pump

Stainless steel multistage submersible deep well pump

Traffic: 2–500 m³/h

Head: 19-600m

Power: 3-90kw

Pipe diameter: 40-200mm

Rated current: 7.9-182.8A

Price: 0.12–86,500

The stainless steel submersible deep-well pump is a high-performance, wear-resistant submersible pump produced by Lianlian Pump Industry—a pump manufacturer that has introduced leading pump technology from overseas companies. The power section is equipped with an internationally advanced, water-immersed stainless steel submersible motor, ensuring absolutely zero contamination of the water quality. This pump represents the finest in both domestic and international deep-well pumping technology today. It features a high-quality stainless steel housing and shaft core.

Hotline:

+86 0731-88632200

classification：

Submersible pump

keyword：

Horizontal Single-Stage Fire Pump

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Product overview Product parameters Why choose us? Frequently Asked Questions

Product Overview

The stainless steel multistage submersible deep-well pump is a high-performance, wear-resistant submersible pump produced by Lianlian Pump Industry, which has introduced leading pump manufacturing technologies from overseas pump companies. The power section is equipped with an internationally advanced, water-immersed stainless steel submersible motor that ensures absolutely zero contamination of the water quality. This pump represents the finest in both domestic and international deep-well pumping technology today. It features a high-quality stainless steel housing, shaft, coupling, inlet seat, and pump head (or a copper-alloy inlet seat and pump head), as well as a high-strength, wear-resistant impeller made from a new composite polymer material and a stainless steel diffuser casing. The pump’s entirely new “floating” impeller design eliminates axial pressure on the motor during operation. It is suitable for conveying hot water, sewage, water containing impurities, and certain corrosive media. It is particularly well-suited for use in industries such as mining and metallurgy, agriculture, construction, aquaculture, food and beverage processing, and residential (or high-rise water supply) applications.

Stainless steel deep well pump 1

Depending on the medium being pumped, stainless steel submersible pumps can be categorized into different subtypes. When pumping well water, fountain water, or water for pressurized water supply systems, the QJ stainless steel deep-well pump is generally considered the optimal choice. It boasts advantages such as high efficiency, high reliability, compact structure, low noise levels, and a long service life, while also meeting hygienic-grade requirements. Pumps made of 316 material are suitable for liquids with higher corrosivity. Based on users’ specific environmental requirements, the QDN stainless steel submersible pump and the QN stainless steel multistage submersible pump are also excellent choices.

Product Parameters

Model Description for Stainless Steel Multi-Stage Submersible Deep Well Pumps

For example: SH250QJ80-300/10-110KW
SH—Enterprise Standard Upgraded Pump Model

250—Indicates that the applicable wellbore diameter is no less than 250 millimeters.
Q—stands for “diving” (the initial letter of the pinyin for “diving”)

J—stands for “well-used” (the initial letter of the pinyin for “well”)
80—indicates a flow rate of 80 m³/h.

300—indicates that the head is 300 meters.

10—indicates a 10-stage impeller in series

110 kW—indicates the motor power

Product Advantages of Stainless Steel Multi-Stage Submersible Deep Well Pumps

The stainless steel submersible pump features a simple structure, convenient maintenance, a small footprint, material savings, high safety and reliability, easy installation, straightforward operation, and compliance with international standards.

Suitable for three-phase power supplies, featuring an aesthetically pleasing appearance, rust prevention, and strong corrosion resistance (pH range of 4 to 10).

Suitable for fountains, marine aquaculture, landscaping and agricultural irrigation, construction, and other fields.

Product Features of Stainless Steel Multi-Stage Submersible Deep Well Pumps

1. The power system of the stainless steel submersible deep-well pump features a 100% copper motor that complies with national standards. The motor’s windings are wound entirely by hand, undergo high-temperature varnish baking, and are subjected to rigorous winding inspections. Additionally, it utilizes 800-grade silicon steel sheets that meet national standards, ensuring powerful motor performance.

2. The stainless steel submersible deep-well pump is equipped with NSK bearings imported from Japan. These imported bearings not only withstand high temperatures of up to 120℃, but also exhibit exceptional wear resistance and operate with low noise levels. As a result, they significantly extend the service life of the stainless steel sewage pump.

3. For mechanical seals, our company uses high-quality double-face mechanical seals made of silicon carbide paired with alloy materials. All rubber components are made of fluororubber, which offers excellent resistance to corrosion, high temperatures, and exceptional wear resistance. These seals ensure zero leakage, allowing our stainless steel sewage pumps to operate safely and reliably even when submerged in water.

4. Our stainless steel submersible deep-well pumps can be equipped with agitator impellers, flow-channel impellers, and cutting impellers. Among these, the agitator impeller can thoroughly mix the sludge at the bottom of the pool into the wastewater, making it easy to pump away. The flow-channel impeller helps prevent clogging and entanglement in the pump. As for the stainless steel submersible deep-well pump fitted with a cutting impeller, its applications are also quite broad: when dealing with domestic sewage or wastewater containing impurities, it can easily shred these impurities, thereby reducing the likelihood of pump blockage.

Application Scope of Stainless Steel Multi-Stage Submersible Deep Well Pumps

1. Wastewater discharge from industrial enterprises.

2. Urban wastewater treatment plant discharge system.

3. Subway, basement, and civil defense system drainage stations.

4. Wastewater discharge from hospitals, hotels, and high-rise buildings.

5. Sewage pumping station in the residential area.

6. Discharge of dilute slurry in municipal engineering and construction sites.

7. Water supply equipment at the water treatment plant.

8. Wastewater discharge from livestock farms and irrigation of rural farmland.

9. Supporting equipment for mine exploration and water treatment.

10. Instead of carrying loads on shoulders or backs, use suction to transport river silt.

Basic Structure of Stainless Steel Multi-Stage Submersible Deep Well Pumps

The basic structure of a multi-stage stainless steel submersible pump consists of six components: the impeller, the pump body, the pump shaft, the bearing, the sealing ring, and the stuffing box.

1. The impeller is the core component of a centrifugal pump. It operates at high speeds and delivers substantial power. The blades on the impeller play a crucial role. Before assembly, the impeller must undergo a static balance test. The inner and outer surfaces of the impeller must be smooth to minimize frictional losses in the water flow.

2. The pump body of the stainless steel submersible pump, also known as the pump casing, is the main component of the pump. It provides support and fixation and is connected to the bracket that houses the bearings.

3. The function of the pump shaft is to connect to the motor via a coupling, transmitting the motor’s torque to the impeller; thus, it is the primary component for transferring mechanical energy.

4. Bearings are components that fit around the pump shaft to support it; there are two main types: rolling bearings and sliding bearings. Rolling bearings use grease as a lubricant, and the amount of grease added should be appropriate—typically filling between 2/3 and 3/4 of the bearing’s volume. Adding too much grease can cause overheating, while adding too little may result in noise and increased temperature! Sliding bearings use clear oil as a lubricant; the oil level should be maintained at the specified mark. Too much oil can seep along the pump shaft and spill onto surrounding areas, whereas too little oil can lead to overheating and eventual damage or even accidents! During pump operation, the bearing temperature typically reaches a maximum of 85 degrees Celsius, though it usually operates around 60 degrees Celsius. If the temperature rises above this range, you should promptly investigate the cause (such as the presence of impurities, whether the oil has turned black, or whether water has entered the system) and take corrective action immediately!

5. The sealing ring for stainless steel submersible deep-well pumps is also known as a leakage-reducing ring. If the clearance between the impeller inlet and the pump casing is too large, water from the high-pressure zone inside the pump will flow through this gap into the low-pressure zone, thereby affecting the pump’s water output and reducing its efficiency. On the other hand, if the clearance is too small, it may cause friction and wear between the impeller and the pump casing. To increase backflow resistance, reduce internal leakage, and extend the service life of both the impeller and the pump casing, a sealing ring is installed at the junction between the inner edge of the pump casing and the outer edge of the impeller. The ideal sealing gap should be maintained within the range of 0.25 to 1.10 mm.

6. The stuffing box mainly consists of packing, a water seal ring, a packing sleeve, a packing gland, and a water seal pipe. The primary function of the stuffing box is to seal the gap between the pump casing and the pump shaft, preventing water from leaking out of the pump and air from entering the pump from the outside. This ensures that the pump maintains a constant vacuum at all times! When friction between the pump shaft and the packing generates heat, the water seal pipe directs water into the water seal ring to cool the packing, thereby keeping the pump running smoothly. Therefore, during routine inspections of the pump’s operation, special attention must be paid to checking the stuffing box. The packing should be replaced approximately every 600 operating hours.

Styles of stainless steel multistage submersible deep well pumps

1. Made of cast iron, specifically conventional gray cast iron HT200.

2. Stainless steel stamped designs are available in 201 and 304 materials. They are relatively inexpensive, but their thickness and corrosion resistance are slightly weaker.

3. High-density casting in stainless steel, available in grades 304, 316, and 316L. Although slightly more expensive than stamping, it offers significant advantages in terms of corrosion resistance and durability.

Friendly reminder: For performance parameters of stainless steel multistage submersible deep well pumps, please click → [Pump Selection] page to view.

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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+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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