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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
MD-type wear-resistant multistage pump for mining applications
Flow rate: 3.7–1350 m³/h
Head: 49–1800 m
Power: 3–1120 kW
Efficiency: 32%-84%
Pump weight: 78–3750 kg
Cavitation margin: 2.0–7.0 m
Price: 15,800–258,000
It is used for conveying neutral mine water (with particle size less than 0.5 mm) and other similar wastewater containing solid particles at a concentration of no more than 1.5%. The temperature of the conveyed medium shall not exceed 80℃. This pump is suitable for applications such as drainage in steel plants, mining operations, and sewage transportation.
Hotline:
Multistage pump
Coal Mine Safety Certified Multi-stage Pump
Horizontal Single-Stage Fire Pump
Product Overview
The MD-type wear-resistant multistage centrifugal pump for mining is a horizontal, single-suction, multistage, sectional or segmental centrifugal pump. Among multistage pump manufacturers, Zhonglian Pump Industry has adopted the hydraulic model of highly efficient and energy-saving products recommended by the national standards to develop a specialized, high-efficiency, high-pressure multistage centrifugal pump tailored specifically for the mining industry. This pump enjoys an advanced technological position within the industry. It boasts advantages such as high efficiency, a wide performance range, safe and stable operation, low noise, long service life, and convenient installation and maintenance. This type of multistage centrifugal pump for mining is designed for conveying neutral mine water (with particle size less than 0.5 mm) containing solid particles at a concentration of no more than 1.5%, as well as other similar wastewater. The temperature of the medium being conveyed shall not exceed 80℃. It is suitable for applications such as drainage in steel plants, mines, and sewage transportation.
↑Operation Case of MD-Type Multi-stage Centrifugal Pump for Mining↑
Meaning of the MD-type Wear-Resistant Multi-stage Centrifugal Pump Model
MD155-67x9
MD—Mine Multistage Centrifugal Pump
155—The pump’s design-point flow rate is 155 m³/h.
67—The single-stage design head of the pump is 67 m.
9——The pump has 9 stages.
Application Conditions for MD-Type Wear-Resistant Multi-Stage Centrifugal Pumps for Mining
1. Under clear-water conditions (with solid particle content below 0.1%), the equipment can operate for 5,000 hours without major overhauls, and its efficiency decline shall not exceed 6%.
2. Under sewage conditions containing solid particles at a concentration of 0.1% to less than 1%, the equipment can operate for 3,000 hours without major overhauls, with an efficiency drop not exceeding 5%.
3. Under sewage conditions containing solid particles at a concentration of 1% to 1.5%, the equipment can operate for 2,000 hours without major overhauls, with an efficiency drop not exceeding 6%.
Introduction to the Structural Features of MD-Type Wear-Resistant Multi-Stage Centrifugal Pumps for Mining Applications
The stator assembly of the multistage pump consists primarily of the front section, middle section, guide vanes, rear section, bearing housing, and balance chamber cover, all connected as a single unit by through bolts and nuts. The flanges on the sides of the front and rear sections are secured to the pump base using bolts and nuts.
The rotor assembly mainly consists of an impeller, an impeller retaining sleeve, a balance retaining sleeve, a balance disc, and a shaft sleeve. These components are secured to the shaft by small round nuts and are prevented from rotating by means of a keyway. The entire rotor is supported by bearings at both ends. The rotor is directly connected to the motor via an elastic pin-type coupling.
To compensate for thermal expansion, a toothed shim is installed between the last stage and the balance sleeve. This component should be replaced during pump maintenance.
The wear-resistant, mining-grade multistage centrifugal pump employs a hydraulic balancing device—the balance disc—that can completely and automatically balance axial forces. This device consists of four components: the balance plate, the balance disc, the balance sleeve, and the balance stop sleeve.
The rotor assembly of the MD-type horizontal multi-stage centrifugal pump for mining applications mainly consists of the shaft and components mounted on the shaft, including impellers, shaft sleeves, balance discs, and others. The number of impellers depends on the pump’s stage configuration. The components mounted on the shaft are securely fastened to the shaft by means of keyways and shaft nuts, ensuring they rotate as a single unit with the shaft. The entire rotor is supported at both ends by rolling bearings or sliding bearings, depending on the bearing model. None of these bearings bear any axial loads; instead, the axial forces are balanced by the balance disc. During operation, the rotor is allowed to axially float within the pump casing, and radial ball bearings must not be used. Rolling bearings are lubricated with grease, while sliding bearings are lubricated with thin oil and self-lubricated via oil rings, with circulating water used for cooling. The sealing surfaces between the pump’s suction section, middle section, and discharge section are all sealed using molybdenum disulfide grease. Additionally, sealing rings and guide vane bushings are installed between the rotating and stationary parts to ensure proper sealing. When the wear level of the sealing rings and guide vane bushings begins to affect the pump’s operational performance, they should be replaced promptly.
The sealing types for multistage centrifugal pumps used in mining applications include mechanical seals and packing seals. When a pump is equipped with a packing seal, the packing rings must be properly positioned, and the packing should be tightened to an appropriate degree—just enough so that liquid leaks 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, or offer water lubrication as needed. A replaceable shaft sleeve is installed at the shaft seal area to protect the pump shaft.
From the perspective of the original motor’s rotation direction, the rotary direction of this type of mining multistage centrifugal pump is clockwise.
MD-type wear-resistant mining multistage centrifugal pump—Coal Safety and Mining Safety Certification Number
MD-type wear-resistant multistage centrifugal pump for mining applications |
|||
Serial Number |
MA |
KA |
Model Specifications |
1 |
MBB140123 |
KBB140037 |
MD6-25×(2~12) |
2 |
MBB140120 |
KBB140047 |
MD6-50×(2~12) |
3 |
MBB140124 |
KBB140048 |
MD6-80×(3~12) |
4 |
MBB140164 |
KBB140071 |
MD12-25×(2~12) |
5 |
MBB140125 |
KBB140057 |
MD12-50×(2~12) |
6 |
MBB140179 |
KBB140058 |
MD12-80×(3~12) |
7 |
MBB140184 |
KBB140066 |
MD25-30×(2~10) |
8 |
MBB140182 |
KBB140067 |
MD25-50×(2~12) |
9 |
MBB140172 |
KBB140068 |
MD25-80×(3~12) |
10 |
MBB140154 |
KBB140040 |
MD46-30×(2~10) |
11 |
MBB140172 |
KBB140041 |
MD46-50×(2~12) |
12 |
MBB140136 |
KBB140042 |
MD46-80×(3~12) |
13 |
MBB140161 |
KBB140050 |
MD85-45×(2~10) |
14 |
MBB140155 |
KBB140046 |
MD85-67×(2~10) |
15 |
MBB140128 |
KBB140052 |
MD85-80×(3~12) |
16 |
MBB140138 |
KBB140055 |
MD100-25×(2~10) |
17 |
MBB140159 |
KBB140051 |
MD120-50×(2~12) |
18 |
MBB140151 |
KBB140061 |
MD150-50×(2~12) |
19 |
MBB140131 |
KBB140062 |
MD150-80×(3~12) |
20 |
MBB140174 |
KBB140059 |
MD150-100×(3~12) |
21 |
MBB140173 |
KBB140060 |
MD155-30×(2~10) |
22 |
MBB140118 |
KBB140063 |
MD155-67×(2~10) |
23 |
MBB140152 |
KBB140065 |
MD200-50×(2~12) |
24 |
MBB140135 |
KBB140072 |
MD200-100×(3~10) |
25 |
MBB140142 |
KBB140069 |
MD280-43×(2~10) |
26 |
MBB140127 |
KBB140070 |
MD280-65×(2~10) |
27 |
MBB140122 |
KBB140064 |
MD280-95×(4~10) |
28 |
MBB140178 |
KBB140056 |
MD360-40×(2~10) |
29 |
MBB140180 |
KBB140054 |
MD360-60×(4~10) |
30 |
MBB140146 |
KBB140044 |
MD360-95×(4~10) |
31 |
MBB140168 |
KBB140038 |
MD450-60×(2~10) |
32 |
MBB140167 |
KBB140039 |
MD450-95×(4~10) |
33 |
MBB140169 |
KBB140043 |
MD500-57×(2~10) |
34 |
MBB140145 |
KBB140045 |
MD600-60×(2~10) |
35 |
MBB140137 |
KBB140049 |
MD720-60×(2~10) |
36 |
MBB140132 |
KBB140009 |
200MD43×(2~10) |
Operating Instructions for MD-Type Wear-Resistant Multistage Centrifugal Pump for Mining Applications: Startup, Operation, and Shutdown
I. Starting the MD-type wear-resistant multistage centrifugal pump for mining applications
Before starting a multi-stage centrifugal pump for mining applications, the pump rotor should be turned to check whether it rotates smoothly.
Check whether the motor rotation direction is consistent with the pump rotation direction.
Open the pump suction valve, close the gate valve on the pump discharge pipeline and the pressure gauge cock, so that the pump is completely filled with liquid, or use a vacuum system to remove air from the suction pipe and the pump itself.
Check the tightness of the bolts connecting the pump and motor, as well as the safety conditions around the pump, to ensure that the pump is in a ready-to-start condition.
Start the motor. Once the pump is running normally, open the pressure gauge cock and gradually open the pump outlet gate valve until the pressure gauge pointer reaches the desired pressure (control the pump’s head according to the reading on the outlet pressure gauge).
II. Operation of MD-type wear-resistant multistage centrifugal pumps for mining applications:
The wear-resistant multistage centrifugal pump for mining uses an internal balancing mechanism within the pump to counterbalance axial forces. The balancing device has a balancing liquid that flows out; this balancing liquid is routed via a balancing pipe to the suction section, or alternatively, a short pipe can be designed outside the balancing chamber, through which the balancing liquid flows outward from the pump. To ensure normal pump operation, the balancing pipe must never be blocked under any circumstances.
While driving and operating the equipment, you must pay close attention to the instrument readings and ensure that the bearing temperature, packing leakage and heating, as well as pump vibration and noise, are all normal. If any abnormalities are detected, they should be addressed promptly.
The variation in bearing temperature rise reflects the assembly quality of the pump. The bearing temperature rise must not exceed 35℃ above the ambient temperature, and the maximum bearing temperature must not exceed 75℃.
The pump rotor experiences a certain amount of axial movement during operation. This axial movement should remain within the allowable range, and the clearance between the end faces of the motor and pump couplings must be ensured.
During operation, the pump should be regularly inspected for wear on components such as the impeller, sealing rings, guide vane sleeves, shaft sleeves, and balance discs. If wear exceeds acceptable limits, these parts should be replaced promptly.
3. Shutdown of the MD-type wear-resistant multistage centrifugal pump for mining use:
Before shutting down the pump, first close the pressure gauge cock, then slowly close the outlet gate valve. After the outlet valve is fully closed, stop the motor. Once the pump has come to a complete stop, close the pump’s suction valve. After draining the water from the pump, if the pump is to be stored for an extended period, disassemble it, clean it thoroughly, apply lubricant, and then properly package and store it.
Product Parameters
Performance Parameters of MD-Type Wear-Resistant Multi-Stage Centrifugal Pump for Mining Applications
| Model Series |
Flow range (m³/h) |
Head range (m) |
Efficiency range (%) |
Matching power range (kw) |
| MD6-25 | 3.75–7.5 | 70.35–320.3 | 36~49.5 | 5.5 to 18.5 |
| MD6-50 | 3.75–7.5 | 144~624 | 28~30 | 15~55 |
| MD6-80 | 3.75–7.5 | 225~982 | 32~36 | 15~75 |
| MD12-25 | 7.5–15 | 68.3–325.3 | 43.3–52.1 | 7.5–30 |
| MD12-50 | 7.5–15 | 142.7~635 | 30.6–44.6 | 18.5~75 |
| MD12-80 | 7.5–15 | 225~982 | 37~40 | 30~132 |
| MD25-30 | 15~30 | 77.7~418.8 | 55.2–56.9 | 15~55 |
| MD25-50 | 15~30 | 144~618 | 44~54 | 22~110 |
| MD25-80 | 15~30 | 228~1013 | 47–56 | 37~160 |
| MD46-30 | 30~55 | 76.2~429 | 60~66.8 | 22~90 |
| MD46-50 | 30~55 | 138.3–658.8 | 53.6–64.5 | 37~160 |
| MD46-80 | 30~55 | 228~1056 | 59–65 | 55~250 |
| 80D12 | 21.6–39.6 | 19~129.6 | 69–75 | 4~18.5 |
| MD65-80 | 50~75 | 228~1056 | 60–67 | 75~315 |
| 100D16 | 37.6–72 | 20.4~178.2 | 66~73 | 7.5~37 |
| MD85-45 | 55~100 | 121.8~612 | 64.2–70.4 | 55~200 |
| MD85-67 | 55~100 | 186.9~888 | 56.1–68.4 | 90~315 |
| MD85-80 | 55~100 | 228~1056 | 59~71 | 110~450 |
| MD85-150 | 55~100 | 429~1872 | 53~60 | 220~900 |
| MD100-25 | 72~119 | 46~270 | 63.4–69 | 30~132 |
| MD100-55 | 85~120 | 147~708 | 64.4–68 | 90~315 |
| MD120-50 | 96~140 | 126.9~654 | 72~78 | 90~280 |
| MD120-67 | 96~140 | 183–840 | 62–71 | 110~450 |
| MD120-80 | 96~140 | 216~1056 | 61.6–70.4 | 132~560 |
| MD120-100 | 96~140 | 261.6–1320 | 69.5~73 | 220~900 |
| 125D25 | 72~119 | 35~230.4 | 70.5–77.5 | 22~90 |
| MD150-50 | 120~180 | 127.5–660 | 72~75 | 110~400 |
| MD150-80 | 120~180 | 228~1056 | 65~75 | 185~710 |
| MD150-100 | 120~180 | 261.6–1320 | 69.5~73 | 220~900 |
| MD150-130 | 120~180 | 354~1644 | 62.5~64 | 315~1250 |
| MD155-30 (150D30) |
100~185 | 81.6–400.8 | 65.5–73.2 | 75~250 |
| MD155-67 | 100~185 | 179.4–895.2 | 63–74 | 132~560 |
| MD200-50 | 132~240 | 135~696 | 78–81 | 132~500 |
| MD200-80 | 132~240 | 216~1044 | 70.9~75 | 220~900 |
| MD200-100 | 132~240 | 252~1356 | 70~76 | 250~1000 |
| MD280-43 (200D43) |
185~335 | 116.1~564 | 70.5–76.7 | 160~630 |
| MD280-65 (200D65) |
185~335 | 184.5–816 | 63.3–74 | 250~1000 |
| MD280-95 | 185~335 | 273~1200 | 68~72.5 | 400~1600 |
| MD280-100 | 185~335 | 279~1248 | 58.6–72.6 | 400~1600 |
| MD300-65 | 240~350 | 180~828 | 69.2–69.5 | 315~1120 |
| MD360-40 | 300~440 | 106.5~504 | 77~80 | 185~710 |
| MD360-60 | 300~440 | 157.5–768 | 71~74.5 | 355~1250 |
| MD360-95 | 300~440 | 267~1224 | 70~73 | 500~2000 |
| MD420-95 | 350~500 | 263~1192 | 67.9–71 | 560~2240 |
| MD450-40 | 330~500 | 112.5~528 | 73.9–76.9 | 220~1000 |
| MD450-60 (250D60) |
335~500 | 162.9–765.6 | 74.1–78.9 | 355~1400 |
| MD450-95 | 335~500 | 267~1200 | 72~75 | 560~2240 |
| MD500-57 | 375~555 | 109.6–717.6 | 69.7–82.6 | 220~1400 |
| MD550-40 | 400~600 | 76~528 | 75.1–78.4 | 185~1120 |
| MD550-50 | 400~600 | 95~660 | 75.1–77.8 | 220~1400 |
| MD550-95 | 400~600 | 182~1230 | 70.9–72.4 | 450~2800 |
| MD580-60 | 450~640 | 113~780 | 75.5–76.8 | 280~1800 |
| MD580-100 | 450~640 | 190–1284 | 70~74 | 500~2800 |
| MD600-60 | 450~710 | 104~780 | 79–82 | 280~1800 |
| MD600-85 | 450~710 | 162~1092 | 72.4–73.6 | 450~2800 |
| MD650-80 | 540~715 | 154~1005 | 73.5–75.5 | 450~2800 |
| MD650-100 | 540~715 | 193~1256 | 79.2–83 | 500~2800 |
| MD720-60 | 550~850 | 106.8~738.1 | 79.2–82.4 | 355~2240 |
| MD720-80 | 550~850 | 149~931.8 | 72.9~76 | 630~2800 |
| MD720-100 | 550~850 | 186~1059 | 76.5–84 | 560~2800 |
| MD800-80 | 620~900 | 150~951.5 | 73–81 | 500~2800 |
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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