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Horizontal multistage centrifugal pump wear-resistant type MD

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Horizontal multistage centrifugal pump

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Pump

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Horizontal multistage centrifugal pump wear-resistant type MD

Flow: 3.75- 1352m³/h

Lifting height: 50-1820m

Efficiency: 33%-83%

Pump weight: 79-3752kg

Motor power: 3.1-1120kw

Cavitation margin: 2.0-7.0m

Price: 1.08-257,000

It is used to transport neutral mineral water with a solid particle content not exceeding 1.5% (particle size less than 0.5 mm) and other similar wastewater. The temperature of the transported medium does not exceed 80°C, suitable for steel factories, mine drainage, wastewater transport, and other scenarios.

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info@cipump.com

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Product Description Product Specifications Why Choose Us? FAQ

Product description

The wear-resistant multistage pump type MD is a single-suction, split-section multistage centrifugal pump, with passages made of high-alloy wear-resistant cast iron or high-quality wear-resistant ductile iron. It is suitable for transporting media with certain solid particles and is one of the most widely used equipment in steel plants, mine drainage, wastewater discharge, and other fields. Especially in deep underground well projects such as coal mines, where underground water inflow can cause safety accidents and threaten the personal and property safety of users. Our wear-resistant multistage pump type MD is a high-lift multistage water pump, with a maximum lift height of up to 1800 meters, as well as features such as high efficiency, wide performance range, safe and stable operation, low noise, long service life, and easy installation and maintenance, fully meeting the needs of various mining users.

Wear-resistant multistage centrifugal pump type MD

Our company is a veteran manufacturer of multistage pumps, independently established after the restructuring of the former Zhonglian Pump Industry, with more than 30 years of experience in research, development, and manufacturing of multistage pumps. With strong technical strength, rich production experience, and comprehensive inspection methods, a professional design and research team, and production technical personnel, we have become a key national high-tech enterprise in multistage pump equipment. All produced multistage pumps use computer design and optimization, ensuring stable and reliable product quality.

Scope of application of the wear-resistant multistage pump type MD

It is used for mine drainage, pumping neutral media with solid particle content not exceeding 1.5% (particle diameter less than 1.3 mm), temperature between 0 and 80 °C, medium density less than 1.02×10³ kg/m³, and other wastewater with similar physical and chemical properties. The effects of use with different transport media are as follows:

1. Under clean water conditions (solid particle content below 0.1%), operation for 5000 hours without major repairs, with an efficiency decrease not exceeding 6%;

2. Under wastewater conditions with solid particle content between 0.1% and less than 1%, operation for 3000 hours without major repairs, with an efficiency decrease not exceeding 5%;

3. Under wastewater conditions with solid particle content between 1% and 1.5%, operation for 2000 hours without major repairs, with an efficiency decrease not exceeding 6%.

Structural and component diagram of the wear-resistant multistage pump type MD

Structural diagram of multistage pump 　

Technical characteristics of the wear-resistant multistage pump type MD

1. High efficiency and energy saving: Maintaining specialized production, we have unique methods in model selection, mold manufacturing, and casting processes of hydraulic components for the wear-resistant multistage pump type MD. All flow passage components are manufactured by precision casting, ensuring dimensions and smoothness of the passage, exceeding on average more than 2% the efficiency of common multistage pumps on the market, achieving excellent energy-saving effect;

2. Advanced equipment and processes: To ensure the assembly performance of the horizontal multistage pump type D, we import advanced foreign parts cleaning equipment. Each part is carefully cleaned before final assembly. In addition to normal material tests, hydrostatic and static balance tests, all rotor components of pumps with more than 6 stages are inspected after a small assembly to verify shaft runout, controlling it within 0.05 mm, then a dynamic balance test of grade G2.5 is performed. After full assembly, shaft and coupling runout and axial movement are rechecked, ensuring product assembly quality;

3. Unique structure: The wear-resistant multistage pump type MD adds a type 0 sealing ring on the coupling surface between the balance ring and the pump to prevent high-pressure water from entering the balance chamber and affecting the balance effect of the balance disc, reducing disc wear and prolonging product life. For pumps with diameter above DN200, a wear indicator for the balance disc is installed at the shaft end to monitor wear of the disc or balance ring and allow timely replacement, ensuring normal equipment operation;

4. Good surface quality: wear-resistant multistage pump type MD It uses precision mold casting process and paint applied with automatic spraying machine, achieving good surface quality and aesthetic appearance.

Structural description of the wear-resistant multistage pump type MD

　1. This pump is a single-suction, split-section centrifugal pump, with water inlet orientable horizontally or vertically upwards. The pump casing parts corresponding to the inlet section, middle section, and outlet section are bolted together forming an assembly, with bearing components at both ends, and the number of pump stages is selected according to the lift height;

2. The rotor part of the wear-resistant multistage pump type MD mainly consists of the shaft and the parts mounted on it, such as the impeller, shaft sleeve, and balance disc. The number of impellers depends on the number of pump stages, and the parts on the shaft are fixed by keys and nuts to form an assembly with the shaft;

3. The complete rotor of the wear-resistant multistage pump type MD is supported by ball or sliding bearings at both ends. Bearings vary by model and do not bear axial forces, which are balanced by the balance disc. Additionally, a wear indicator for the balance disc is installed at the pump end to monitor its wear;

4. The sealing surfaces between the inlet, middle, and outlet sections of the wear-resistant multistage pump type MD are sealed with sealing adhesive or "O" rings. Between the rotor part and the fixed part, sealing rings and guide sleeves are installed for sealing. When wear of these components affects pump performance, they should be replaced timely;

5. The shaft sealing method of the wear-resistant multistage pump type MD can be mechanical seal or packing seal. When packing seal is used, the placement of the packing ring must be correct and the packing tension appropriate, allowing liquid to leak drop by drop. Various sealing elements of the pump are installed in the sealing chamber, which must receive adequate water pressure to function as water seal, water cooling, or water lubrication.

6. The wear-resistant multistage pump type MD allows the rotor to move axially within the casing during operation. The horizontal multistage pump type D generally uses roller bearings and a dry oil lubrication structure (DVDG85-67, D/DG155-67 type pumps can use sliding bearings with light oil lubrication, or also roller bearings with dry lubrication).

7. The wear-resistant multistage pump type MD is directly driven by the motor through an elastic coupling. From the motor direction, the pump rotates clockwise. The standard motor is from the Y3 series, and in environments with flammable and explosive gases, the explosion-proof motor from the YB3 series is used.

8. If you have special requirements regarding the materials and structure of the wear-resistant multistage pump type MD, you can negotiate with our company. Our professional technical staff can customize the impeller material, configuration, and the pump's inlet and outlet direction according to your needs, ensuring that your operating conditions are met.

On-site usage image of wear-resistant multistage pump for mining

Precautions for the use of the wear-resistant multistage pump type MD

The multistage pump must operate under design conditions. If the lift height exceeds the specified range for a prolonged time, it will affect the safety of the entire piping system and be uneconomical. If the lift height is below the specified range, that is, the multistage pump is used under high flow and low head conditions, especially in multistage pumps with low rotational speed, the shaft power will increase rapidly, which can cause motor overload and easily burn it out. When the flow increases, the maximum allowable suction height for the pump decreases with the increase in flow, which can cause cavitation, significantly affecting the pump's performance and reducing usage economy. Therefore, it is not allowed for the multistage pump to operate below the specified conditions.

Product Parameters

Description of the wear-resistant multistage pump model type MD

Performance parameters of the wear-resistant multistage pump type MD (These data are for reference only, please take the actual order as the standard!)

D/DG/DF/MD6-25	D/DG/DF/MD6-50	D/DG/DF/MD6-80	D/DG/DF/MD12-25
D/DG/DF/MD12-50	D/DG/DF/MD12-80	D/DG/DF/MD25-30	D/DG/DF/MD25-50
D/DG/DF/MD25-80	D/DG/DF/MD46-30	D/DG/DF/MD46-50	D/DG/DF/MD46-80
D/DG/DF/MD85-45	D/DG/DF/MD85-67	D/DG/DF/MD85-80	D/DG/DF/MD85-100
D/DG/DF/MD120-50	D/DG/DF/MD120-100	D/DG/DF/MD150-30	D/DG/DF/MD150-50
D/DG/DF/MD150-80	D/DG/DF/MD150-100	D/DG/DF/MD155-30	D/DG/DF/MD155-67
D/DG/DF/MD200-50	D/DG/DF/MD200-100	D/DG/DF/MD200-150	D/DG/DF/MD210-70
D/DG/DF/MD280-43	D/DG/DF/MD280-65	D/DG/DF/MD280-95	D/DG/DF/MD280-100
D/DG/DF/MD300-45	D/DG/DF/MD360-40	D/DG/DF/MD360-60	D/DG/DF/MD360-95
D/DG/DF/MD450-60	D/DG/DF/MD450-95	D/DG/DF/MD500-57	D/DG/DF/MD550-50
D/DG/DF/MD580-60	D/DG/DF/MD640-80	D/DG/DF/MD720-60	D/DG/DF/MD1100-85

For more performance parameters of the wear-resistant multistage pump type MD, please download the intelligent selection software on the pump selection page or call: 0731-88192288 for more information.

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.

FAQ

What products do you mainly produce?

Zoomlion Pump Industry manufactures various large industrial centrifugal pumps. The main products include: self-balancing multistage pumps, multistage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condenser pumps, and more.

Can you help me choose a model?

Of course! If the water pump model is not selected accurately, it can cause significant problems. After you take it back, it might be either too small to meet the usage requirements or too large, resulting in higher electricity and fuel costs, increasing the operating expenses.

Why is the price quotation so slow?

Because centrifugal pumps are non-standard custom products with many models and a wide price range. Even for the same model, the price varies greatly depending on the materials and configurations used. Taking the most common 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 clearly confirm the relevant information to provide you with an accurate price. Normally, if you provide comprehensive information, we can quote within 5 minutes.

What information should I provide when I need a quote?

Usually, if you want to get an accurate quote, it is recommended that you provide us with the following information: pump flow rate, head, on-site operating voltage, frequency, temperature of the conveyed liquid, pH value, solid particle content, on-site installation conditions (horizontal or vertical installation), and other related details. If you are not very familiar with these, it’s okay; our sales manager will assist you in determining them.

Do you have centrifugal pumps in stock?

There are many models and configurations of centrifugal pumps. Except for a small number of commonly used standard models that are in stock, the vast majority of models and configurations are not stocked and are customized products. We need to first select the pump based on your site conditions such as flow rate, head, medium temperature, pH value, and installation conditions. After determining the pump model and configuration, we can then place an order with the workshop for production.

What is your usual delivery time?

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 。