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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
MDP-type wear-resistant self-balancing multistage pump for mining applications
Flow rate: 3.7–1350 m³/h
Head: 73–1800 m
Power: 5.5–4500 kW
Efficiency: 32%-84%
Pump weight: 158–6256 kg
Cavitation margin: 2.0–7.0 m
Price: 29,500–498,500
The MDP-type mine-use self-balancing multistage centrifugal pump can convey medium-sized mine water and other similar wastewater containing particles with a content of ≤1.5%, particle size of ≤1.3 mm, and temperatures ranging from -20℃ to 80℃.
Hotline:
Self-balancing multistage pump
Coal Mine Safety Certified Multi-stage Pump
Horizontal Single-Stage Fire Pump
Product Overview
The MDP-type mine-use self-balancing multistage centrifugal pump features a rotor assembly with symmetric impellers at each stage, eliminating the conventional balance disc mechanism found in traditional multistage mine pumps. During operation, the axial forces generated are mutually balanced and essentially self-balanced, ensuring that the alignment between the impellers and diffusers remains consistently stable. This design significantly enhances the overall operational efficiency of the pump. The MDP-type pump represents an innovative structural design within the self-balancing multistage pump series and serves as a viable alternative to pumps equipped with balance discs or balance drums. Moreover, self-balancing technology is poised to become the future trend in the field of multistage centrifugal pumps.
The MDP-type mine self-balancing multistage centrifugal pump can convey medium-sized mine water and other similar wastewater containing particles with a content of ≤1.5%, particle size of ≤1.3 mm, and temperatures ranging from -20℃ to 80℃.
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↑Animated demonstration of a mine-use self-balancing multistage centrifugal pump↑ |
↑8 underground real-shot images of mine-use self-balancing multistage centrifugal pumps↑ |
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I. Parameter Range and Model Description for MDP-Type Wear-Resistant Self-Balancing Multistage Pumps for Mining Applications
Flow rate Q: 3.7–1350 m³/h
Head H: 73–1800 m
Model: MD(P)85-67×7
MDP—Mine-use Self-balancing Multistage Centrifugal Pump
85——Pump design point flow rate: 85 m³/h
67—The single-stage design head of the pump is 67 m.
7——Number of pump stages
II. MDP-type Wear-Resistant Self-Balancing Multistage Pump for Mining vs. Traditional Wear-Resistant Multistage Pumps
As shown in the comparison above, the main advantages of the self-balancing multistage system over the traditional multistage system are:
1. Highly efficient and energy-saving, with significant power-saving effects.
Due to the reduced shaft power, the pump's power consumption per unit time decreases, resulting in a significant reduction in operating costs.
2. Advanced structure with a long maintenance-free period.
Due to the absence of balancing devices, the hydraulic system has fewer vulnerable parts, boasts long trouble-free operating periods, and significantly reduces maintenance and repair costs.
III. Introduction to the Structure of MDP-Type Wear-Resistant Self-Balancing Multistage Pumps for Mining Applications
The suction inlet of the MDP-type mine-use wear-resistant self-balancing multistage pump can be arranged vertically upward or horizontally, while the discharge outlet is positioned vertically upward. The pump mainly consists of the following components: the suction section, the middle section, the discharge section, the secondary suction section, forward guide vanes, reverse guide vanes, forward impellers, reverse impellers, shaft, throttling and pressure-reducing devices, sleeve bushings, bearing housings, transition pipes, and other parts. The middle section is connected to the suction and discharge sections by high-strength through-bolts. The sealing surfaces between the pump’s suction section, middle section, and discharge section all employ a hard metal seal lubricated with molybdenum disulfide grease. The rotor comprises forward impellers mounted on the shaft, a throttling and pressure-reducing device, reverse impellers, shaft sleeves, bearing bushings, and other components. The bearings adopt a “fixed-floating” dry-lubrication structure: the drive end uses cylindrical roller bearings, while the tail end employs angular contact ball bearings. The pump’s working chamber is composed of the suction section, middle section, discharge section, secondary suction section, forward guide vanes, reverse guide vanes, transition pipes, and other components. A sealing ring and guide vane sleeves are installed between the rotating and stationary parts to ensure proper sealing. When the degree of wear on the sealing rings and guide vane sleeves begins to affect the pump’s operational performance, they should be replaced promptly.
↑Anatomical Diagram of a Self-Balancing Multistage Pump↑
IV. Structural Diagram of the MDP-Type Wear-Resistant Self-Balancing Multistage Pump for Mining Applications
There are two types of shaft seals: mechanical seals and packing seals. When a pump uses a packing seal, the packing rings must be properly positioned, and the tightness of the packing should be just right—ideally allowing liquid to seep out drop by drop. All sealing components of the pump are housed within a sealing chamber, which is supplied with water at a certain pressure to serve as a water seal, provide water cooling, and offer water lubrication. A replaceable shaft sleeve is installed at the shaft seal to protect the pump shaft.
V. Working Principle of the MDP-Type Wear-Resistant Self-Balancing Multistage Pump for Mining Applications
Driven by the motor, the shaft of the MDP-type mine-use self-balancing multistage centrifugal pump rotates, doing work on the liquid and increasing its energy. As a result, the required amount of liquid is continuously conveyed—from the suction sump through the pump’s inlet section, forward impeller, forward guide vanes, middle section, horizontal outlet at the discharge section, transition pipe, secondary inlet section, reverse impeller, reverse guide vanes, and finally via the vertical outlet at the discharge section.
Product Parameters
Performance Parameters of MDP-Type Wear-Resistant Self-Balancing Multistage Pump for Mining Applications
| Model Series |
Flow range (m³/h) |
Head range (m) |
Efficiency range (%) |
Matching power range (kw) |
| MDP6-25 | 3.75–7.5 | 70.35–320.3 | 36~49.5 | 5.5 to 18.5 |
| MDP6-50 | 3.75–7.5 | 144~624 | 28~30 | 15~55 |
| MDP6-80 | 3.75–7.5 | 225~982 | 32~36 | 15~75 |
| MDP12-25 | 7.5–15 | 68.3–325.3 | 43.3–52.1 | 7.5–30 |
| MDP12-50 | 7.5–15 | 142.7~635 | 30.6–44.6 | 18.5~75 |
| MDP12-80 | 7.5–15 | 225~982 | 37~40 | 30~132 |
| MDP25-30 | 15~30 | 77.7~418.8 | 55.2–56.9 | 15~55 |
| MDP25-50 | 15~30 | 144~618 | 44~54 | 22~110 |
| MDP25-80 | 15~30 | 228~1013 | 47~56 | 37~160 |
| MDP46-30 | 30~55 | 76.2~429 | 60~66.8 | 22~90 |
| MDP46-50 | 30~55 | 138.3–658.8 | 53.6–64.5 | 37~160 |
| MDP46-80 | 30~55 | 228~1056 | 59–65 | 55~250 |
| MDP65-80 | 50~75 | 228~1056 | 60–67 | 75~315 |
| MDP85-45 | 55~100 | 121.8~612 | 64.2–70.4 | 55~200 |
| MDP85-67 | 55~100 | 186.9~888 | 56.1–68.4 | 90~315 |
| MDP85-80 | 55~100 | 228~1056 | 59~71 | 110~450 |
| MDP85-150 | 55~100 | 429~1872 | 53~60 | 220~900 |
| MDP100-55 | 85~120 | 147~708 | 64.4–68 | 90~315 |
| MDP120-50 | 96~140 | 126.9~654 | 72~78 | 90~280 |
| MDP120-67 | 96~140 | 183–840 | 62–71 | 110~450 |
| MDP120-80 | 96~140 | 216~1056 | 61.6–70.4 | 132~560 |
| MDP120-100 | 96~140 | 261.6–1320 | 69.5~73 | 220~900 |
| MDP150-50 | 120~180 | 127.5–660 | 72~75 | 110~400 |
| MDP150-80 | 120~180 | 228~1056 | 65~75 | 185~710 |
| MDP150-100 | 120~180 | 261.6–1320 | 69.5~73 | 220~900 |
| MDP150-130 | 120~180 | 354~1644 | 62.5~64 | 315~1250 |
| MDP155-30 | 100~185 | 81.6–400.8 | 65.5–73.2 | 75~250 |
| MDP155-67 | 100~185 | 179.4–895.2 | 63–74 | 132~560 |
| MDP200-50 | 132~240 | 135~696 | 78–81 | 132~500 |
| MDP200-80 | 132~240 | 216~1044 | 70.9~75 | 220~900 |
| MDP200-100 | 132~240 | 252~1356 | 70~76 | 250~1000 |
| MDP280-43 | 185~335 | 116.1~564 | 70.5–76.7 | 160~630 |
| MDP280-65 | 185~335 | 184.5~816 | 63.3–74 | 250~1000 |
| MDP280-95 | 185~335 | 273~1200 | 68~72.5 | 400~1600 |
| MDP280-100 | 185~335 | 279~1248 | 58.6–72.6 | 400~1600 |
| MDP300-65 | 240~350 | 180~828 | 69.2–69.5 | 315~1120 |
| MDP360-40 | 300~440 | 106.5~504 | 77~80 | 185~710 |
| MDP360-60 | 300~440 | 157.5–768 | 71~74.5 | 355~1250 |
| MDP360-95 | 300~440 | 267~1224 | 70~73 | 500~2000 |
| MDP420-95 | 350~500 | 263~1192 | 67.9~71 | 560~2240 |
| MDP450-40 | 330~500 | 112.5~528 | 73.9–76.9 | 220~1000 |
| MDP450-60 | 335~500 | 162.9–765.6 | 74.1–78.9 | 355~1400 |
| MDP450-95 | 335~500 | 267~1200 | 72~75 | 560~2240 |
| MDP500-57 | 375~555 | 109.6–717.6 | 69.7–82.6 | 220~1400 |
| MDP550-40 | 400~600 | 76~528 | 75.1–78.4 | 185~1120 |
| MDP550-50 | 400~600 | 95~660 | 75.1–77.8 | 220~1400 |
| MDP550-95 | 400~600 | 182~1230 | 70.9–72.4 | 450~2800 |
| MDP580-60 | 450~640 | 113~780 | 75.5–76.8 | 280~1800 |
| MDP580-100 | 450~640 | 190–1284 | 70~74 | 500~2800 |
| MDP600-60 | 450~710 | 104~780 | 79–82 | 280~1800 |
| MDP600-85 | 450~710 | 162~1092 | 72.4–73.6 | 450~2800 |
| MDP650-80 | 540~715 | 154~1005 | 73.5–75.5 | 450~2800 |
| MDP650-100 | 540~715 | 193~1256 | 79.2–83 | 500~2800 |
| MDP720-60 | 550~850 | 106.8~738.1 | 79.2–82.4 | 355~2240 |
| MDP720-80 | 550~850 | 149~931.8 | 72.9~76 | 630~2800 |
| MDP720-100 | 550~850 | 186~1059 | 76.5–84 | 560~2800 |
| MDP800-80 | 620~900 | 150~951.5 | 73–81 | 500~2800 |
| MDP850-100 | 705~935 | 289~942 | 80~85 | 900~2800 |
| MDP900-60 | 700~1000 | 168~786 | 76.2~78 | 710~2800 |
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.
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