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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
DK-type multistage double-suction split-case pump
Flow rate: 18–1368 m³/h
Head: 100–400 m
Power: 22–1600 kW
Efficiency: 37%-85%
Pump weight: 100–3000 kg
Cavitation margin: 2.0–14.3 m
Price: 81,800–1,180,000 yuan
The DK-type double-suction mid-split pump is a horizontal, two-stage, horizontally split, double-suction centrifugal pump. It’s a new-generation, highly efficient and energy-saving double-suction mid-split pump developed by Zhonglian Pump Industry—a manufacturer of double-suction mid-split pumps—using its own proprietary technology. This product boasts superior performance, a comprehensive range of models and specifications, and a reasonable price. It is suitable for industrial and municipal water supply and drainage applications and can also be used for agricultural irrigation and drainage.
Hotline:
Middle-open pump
Coal Mine Safety Certified Multi-stage Pump
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Product Overview
DK-type multistage double-suction Middle-open pump This is a horizontal, two-stage, split-case centrifugal pump suitable for industrial and municipal water supply and drainage applications, as well as agricultural irrigation and drainage. It is designed to convey clean water or liquids whose physical and chemical properties are similar to those of water. The temperature of the medium being conveyed ranges from -20°C to 80°C. The maximum allowable inlet pressure is 0.6 MPa.
Model Description for DK-Type Multi-stage Double-suction Split-case Pump
Model: 40DK130
40 - Outlet diameter (mm)
DK—Indicates a multi-stage, open-type design.
130 - Pump head (m)
Schematic Diagram of the DK-Type Multi-stage Double-suction Split-case Pump Structure
 |
1. Pump cover 2. Impeller 3. Seal ring 4. Axis 5. Pump body 6. Water seal pipe component 7. Bearing housing component 8. Shaft seal components |
DK-type multi-stage Middle-open pump The pump features a horizontal split casing. Both the suction and discharge ports are located in the lower part of the pump casing, beneath the split surface, and are positioned horizontally on either side, perpendicular to the shaft axis. During maintenance, there is no need to remove the motor or piping, making operation extremely convenient. The shaft is supported by either rolling bearings or sliding bearings. With the exception of models 100DK230 and 250DK240, which use oil lubrication for their rolling bearings, all other models employ grease lubrication. Model 250DK360 uses forced circulating oil lubrication with sliding bearings (equipped with an oil supply station). The pump shaft seal can be either a packing seal or a mechanical seal.
Rotation direction: When viewed from the motor end, pumps of models 250DK240 and 250DK360 rotate counterclockwise—that is, the suction port is on the left and the discharge port is on the right. All other models rotate clockwise.
Part material: 250DK360 is made of cast steel and cast stainless steel; all others are made of cast iron.
Complete package scope: Supply pumps, motors, bases, check valves, and gate valves as a complete set.
Performance of DK-type Multi-stage Double-suction Split-case Pump Products
1. High efficiency and energy saving
The multi-stage double-suction, center-split centrifugal pump adopts a high-efficiency hydraulic model, optimized flow passages and structural design, simultaneously reducing both hydraulic and volumetric losses. As a result, the new DKS series of high-efficiency, horizontal, center-split multi-stage centrifugal pumps boasts higher design efficiency and operational efficiency.
2. Advanced design technology
The hydraulic model design of the multistage double-suction centrifugal pump employs advanced hydraulic design software and is integrated with internationally renowned hydraulic model designs. Using CFD technology, flow field analysis is conducted based on the theory of three-dimensional flow and mesh generation techniques, resulting in a pump efficiency that is more than 5% higher than that achieved by conventional design methods.
The design strength of the multistage, center-split centrifugal pump casing and pump shaft is verified through finite element analysis to ensure reliable structural integrity, smooth and durable operation, and a long service life.
3. Optimized flow channel technology
The optimized flow passage is matched to the pump’s operational performance, ensuring high efficiency and a wide efficient operating range, making it easier to meet the requirements under various operating conditions. At the same time, this design balances radial forces, reduces impact and vibration during pump operation, and enables smoother pump performance.
4. High Reliability
With its dual-inlet structure, the pump features a simple and leak-resistant seal, making the sealing more secure and reliable.
All impellers are arranged back-to-back on the pump shaft, ensuring that axial forces are completely balanced during operation and allowing for safe operation even when conveying media under heavy-load conditions.
The rotor assembly undergoes rigorous dynamic balancing tests to eliminate unbalance, reduce pump vibration, and ensure smooth pump operation with low noise levels.
5. Fully automatic monitoring system
Multi-stage, split-case pumps can be optionally equipped with automatic monitoring devices according to operational requirements. These devices can monitor vibrations in bearings, pump casings, and motors, as well as leakage from mechanical seals, and also track the operational efficiency of the unit. An automatic insulation system ensures safe operation of the unit even during cold seasons. All monitoring instruments are connected via an explosion-proof operator column system, enabling both local and remote operation of the unit.
Product Parameters
Parameter Range of DK-Type Multi-stage Double-suction Split-case Pump
Flow rate Q: 18–1368 m³/h
Head H: 100~400 m
Technical Specification Table for DK-Type Multi-stage Double-suction Split-case Pump
| Model | Flow rate (m³/h) | Head (m) | Efficiency (%) | Shaft power (kW) | Rotational speed (rpm) | Motor power (kW) |
| 40DK130 | 23.4 | 126.8 | 47 | 17.2 | 2980 | 22 |
| 40DK160 | 41.8 | 159.3 | 49.2 | 36.88 | 2980 | 55 |
| 50DK100 | 50.1 | 100.5 | 69.3 | 19.8 | 2980 | 30 |
| 50DK170 | 72 | 168 | 60 | 54.94 | 2980 | 75 |
| 80DK160 | 122.4 | 187 | 78 | 79.96 | 2980 | 110 |
| 100DK230 | 231.1 | 229.5 | 81.5 | 177.33 | 2980 | 250 |
| 250DK240 | 1188 | 240 | 85 | 914.06 | 1480 | 1250 |
| 250DK240A | 900 | 192 | 84 | 560.57 | 1480 | 630 |
| 250DK360 | 1100 | 360 | 83 | 1300.12 | 2980 | 1600 |
| 250DK360A | 992 | 292 | 83 | 951.01 | 2980 | 1000 |
Friendly reminder: Click on the specific model series above to view more detailed specifications and performance curves, among other information.
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.
Square meters of land area
100% factory pass rate
Square meters of land area
100% factory pass rate
Q
What is your typical delivery time?
A
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 。
Q
Do you have centrifugal pumps in stock?
A
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.
Q
What information should I provide when requesting a quote?
A
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.
Q
What products do you mainly produce?
A
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.
Q
Why is it so slow to get a price quote?
A
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.
Product message
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Hotline:
+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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