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Product Center
Wear-resistant multistage pump for mining type MD
Flow: 3.7- 1350m³/h
Lifting height: 49-1800m
Power: 3-1120kw
Efficiency: 32%-84%
Weight of the pump: 78-3750kg
Cavitation margin: 2.0-7.0m
Price: 1.58-25.8 thousand
It is used to transport neutral mineral water with a solid particle content not exceeding 1.5% (particle size less than 0.5 millimeters) and other similar wastewater. The temperature of the transported medium does not exceed 80℃, suitable for steel factories, mine drainage, wastewater transport, and other scenarios.
Product description
The wear-resistant multistage centrifugal pump type MD for mining is a horizontal centrifugal pump with single suction and segmented/multi-stage. The multistage pump manufacturer Zhonglian Pump Industry uses an efficient and energy-saving hydraulic model recommended by the state, developing a high-pressure and high-efficiency multistage centrifugal pump specifically for the mining industry, which occupies an advanced position in technology within the sector. It has the advantages of high efficiency, wide performance range, safe and stable operation, low noise, long service life, and easy installation and maintenance. This type of multistage centrifugal pump for mining is used to transport neutral mining water with a solid particle content not exceeding 1.5% (particle size less than 0.5 mm) and other similar wastewater, with a transported medium temperature not exceeding 80°C, suitable for steel mills, mine drainage, wastewater transport, among other scenarios.
↑Operation cases of the multistage centrifugal pump for mining type MD↑
Meaning of the wear-resistant multistage centrifugal pump model type MD for mining
MD155-67x9
MD—Multistage centrifugal pump for mining
155—The design flow rate of the pump is 155m3/h
67—The design height of one stage of the pump is 67m
9—The number of stages of the pump is 9
Application conditions of the wear-resistant multistage centrifugal pump type MD for mining
1. Under clean water conditions (solid particle content less than 0.1%), operation of 5000 hours without major repair, with an efficiency decrease not exceeding 6%;
2. Under wastewater conditions with solid particle content between 0.1% and less than 1%, operation of 3000 hours without major repair, with an efficiency decrease not exceeding 5%;
3. Under wastewater conditions with solid particle content between 1% and 1.5%, operation of 2000 hours without major repair, with an efficiency decrease not exceeding 6%.
Introduction to the structural characteristics of the wear-resistant multistage centrifugal pump type MD for mining
The static part of the multistage pump is mainly composed of the front section, middle section, guide vanes, rear section, bearing support, and balance chamber cover, joined together by through rods and nuts; the wings of the front and rear sides are fixed to the pump seat with bolts and nuts.
The rotor components are mainly composed of the impeller, impeller stop sleeve, balance sleeve, balance disc, and shaft sleeve, secured with small round nuts and fixed to the shaft by keys to prevent rotation. The entire rotor is supported by bearings at both ends. The rotor is directly connected to the motor via a pin coupling.
To compensate for expansion, a toothed washer is installed between the last stage and the balance sleeve, which must be replaced during pump maintenance.
The wear-resistant multistage centrifugal pump for mining uses an axial balance hydraulic device with a balance disc that can fully and automatically balance the axial force, composed of four pieces: balance plate, balance disc, balance sleeve, and balance stop sleeve.
The rotor part of the horizontal multistage centrifugal pump type MD for mining is mainly composed of the shaft and the parts mounted on it, such as the impeller, shaft sleeve, and balance disc, the number of impellers depending on the number of stages of the pump. The parts on the shaft are fixed by keys and nuts to form an assembly with the shaft. The entire rotor is supported by roller or sliding bearings at both ends, depending on the model, without bearing axial forces, which are balanced by the balance disc. During operation, the rotor is allowed to move axially within the pump casing, centering ball bearings should not be used. Roller bearings are lubricated with grease, sliding bearings with light oil and self-lubrication through oil rings, with cooling by circulating water. The sealing surfaces between the inlet, middle, and outlet sections of the pump use molybdenum disulfide grease. Sealing rings and guide sleeves are installed between the rotating and fixed parts for sealing; when the wear of these affects the performance of the pump, they must be replaced.
The sealing methods of the multistage centrifugal pump for mining include mechanical sealing and packing sealing. When using packing sealing, the position of the packing ring must be correct and the tension must be adequate to allow the liquid to leak drop by drop. The various sealing elements are installed in the sealing chamber, which must have an adequate water pressure to function as a water seal, cooling, or lubrication with water. A replaceable sleeve is installed in the shaft seal to protect the pump shaft.
The direction of rotation of this type of multistage centrifugal pump for mining, viewed from the original direction of the motor, is clockwise.
Mining and coal safety certificate number for the wear-resistant multistage centrifugal pump type MD for mining
Wear-resistant multistage centrifugal pump type MD for mining | |||
No. Number | MA | KA | Model and 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) |
Instructions for starting, operating, and stopping the wear-resistant multistage centrifugal pump type MD for mining
I. Starting the wear-resistant multistage centrifugal pump type MD for mining
Before starting the multistage centrifugal pump for mining, the pump rotor must be turned to check if the rotor is flexible;
Check that the motor direction matches the pump direction;
Open the suction valve of the pump, close the gate valve and the pressure gauge plug in the outlet pipe to fill the pump with liquid, or use a vacuum system to remove air from the suction pipe and the pump;
Check the tightness of the connection bolts between the pump and the motor and the safety around the pump to ensure it is ready to start;
Start the motor, and when the pump is running normally, open the pressure gauge plug and slowly open the outlet gate valve until the pressure gauge indicates the required pressure (control the lift height given by the pump according to the reading of the outlet pressure gauge).
II. Operation of the wear-resistant multistage centrifugal pump type MD for mining:
The wear-resistant multistage centrifugal pump for mining balances the axial force through an internal balancing mechanism; the balancing liquid flows from the balancing water tube to the inlet section, or a short tube is designed outside the balancing chamber for the balancing liquid to flow outside the pump. To ensure the normal operation of the pump, the balancing water tube must not be blocked under any circumstances;
During startup and operation, the instrument readings, bearing heating, leakage, and packing heating, as well as the vibration and sound of the pump, must be carefully monitored; if any anomalies are detected, they must be addressed in a timely manner;
The change in bearing temperature increase reflects the quality of the pump assembly; the bearing temperature must not exceed 35℃ above ambient temperature, and the maximum bearing temperature must not exceed 75℃;
The pump rotor exhibits some axial movement during operation, the axial movement must be within the allowed range, and the value of the space between the faces of the motor and water pump couplings must be guaranteed;
During operation, the wear of parts such as the impeller, sealing ring, guide vane sleeve, shaft sleeve, and balancing disk must be periodically inspected; if the wear is excessive, it must be replaced in a timely manner.
III. Stopping the wear-resistant multistage centrifugal pump type MD for mining:
Before stopping, the pressure gauge plug must be closed first, slowly close the outlet gate valve, and after the outlet valve is completely closed, turn off the motor; once the pump stops, close the suction valve; drain the water inside the pump; if it is to be left unused for a long time, it must be disassembled, cleaned, lubricated, and stored properly.
Product parameters
Performance parameters of the wear-resistant multistage centrifugal pump type MD for mining
| Model Series |
Flow range (m³/h) |
Lifting height range (m) |
Efficiency range (%) |
Compatible power range (kw) |
| MD6-25 | 3.75~7.5 | 70.35~320.3 | 36~49.5 | 5.5~18.5 |
| 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 |
Kind advice: click on the specific model series above to see more detailed parameters and corresponding performance curve graphs.
Why Choose Us?
Changsha Zhonglian Pump Industry Co., Ltd. was established in 1989, following the reform of the Changsha Water Pump Factory. It is a national high-tech comprehensive enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Stock Exchange on December 31, 2019, with the abbreviated name "Zhonglian Pump Industry" and stock code: 600275HN. It is currently a key enterprise in China's centrifugal pump industry and one of the leading domestic manufacturers of multi-stage pumps, headquartered in Changsha, Hunan, a historical and cultural city in China.
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Models in stock can be shipped by the next day at the latest. Others are custom-made, and depending on the product size and specific project conditions, the delivery time is generally between 7-90 days. Please consult our sales manager for details: 0731-88632200 。
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