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Mixed flow pumps are a common type of centrifugal pump that play an important role in fluid transfer and circulation systems. It is designed and constructed to combine the features of an axial flow pump and a centrifugal pump to perform well in medium flow and medium head applications. When choosing, you need to consider many factors to ensure that you choose the pump type and specification that suits your needs. This article will introduce some key considerations for choosing a mixed flow pump to help readers better understand and make a good choice.
1. Understand what a mixed flow pump is
Working principle of mixed flow pump
Mixed flow pump is a kind of pump equipment commonly used in industrial and construction fields. It belongs to a type of centrifugal pump and has characteristics between centrifugal pump and axial flow pump.
Its working principle is to pass the liquid through the inlet of the pump, and then discharge the liquid from the outlet of the pump under the combined action of centrifugal force and axial thrust. Compared with centrifugal pumps, the fluid movement path of mixed flow pumps is closer to the axial direction, but still has a certain centrifugal effect. This makes it capable of producing higher flows and lower heads.
Advantages and disadvantages of mixed flow pumps
Double acting provides a number of unique qualities to mixed flow pumps:
Advantages of mixed flow pumps
- high traffic
- They can pump both clear liquids as well as contaminated or cloudy liquids
- Combines the higher mass flow of axial pumps with the higher pressure of centrifugal pumps
Disadvantages of mixed flow pumps
- relatively low pressure head
Mixed flow pump application
The unique features of mixed flow pumps allow them to be used in some special applications where other types of centrifugal pumps fail, especially in the range between radial and axial flow pumps. Mixed flow pumps are used to pump:
- Industrial accessories sewage
- industrial waste
- seawater
- paper mill
The unique diagonal design of the impeller enables the mixed flow pump to handle contaminated or turbid liquids. Therefore, mixed flow pumps are often used to pump sewage or industrial liquids containing suspended solids. It is also used for dehydration and pumping sea water. Also used for pumping pulp in paper mills.
If we look at the characteristics of the pump, we see that a mixed flow pump has a specific speed between axial and radial configurations. Therefore, mixed flow pumps are ideal for any application that requires the pump to operate in the gap between the axial pump and the radial pump.
2. What are the types of mixed flow pumps
Horizontal Axis Mixed Flow Pumps: Horizontal axis mixed flow pumps are the most common type of mixed flow pump. Its inlet and outlet are on the same level, which is suitable for the application of large flow and medium lift.
Vertical axis mixed flow pump: The inlet and outlet of the vertical axis mixed flow pump are in the vertical direction, which is suitable for vertical installation or occasions that need to save space.
Mixed-flow centrifugal pump: The mixed-flow centrifugal pump combines the characteristics of mixed-flow pumps and centrifugal pumps, and has higher flow and higher head. It is suitable for medium to high head applications.
Adjustable vane mixed flow pump: The adjustable vane mixed flow pump can adjust the angle of the vane as needed to achieve different flow and head requirements. It has greater flexibility and adjustability.
3. Confirm the flow requirements of the mixed flow pump
Determine the required flow range: First, determine the maximum and minimum flow ranges required for your application. Consider fluid handling needs, such as flow requirements for water systems or process fluids.
Consider flow changes and adjustment needs: Determine whether there are flow changes and adjustment needs. Some applications may require flow adjustments for different time periods or conditions. Understanding these changes will help determine the required flow range and sizing options.
Consider Piping and System Constraints: Evaluate piping and system constraints such as pipe diameters, lengths, and height differences. These factors affect flow and may require consideration of additional pump lift and drag losses.
Consider system characteristics: Know the characteristics of your fluid transfer system, such as the viscosity, density, and special requirements of your fluids. Certain applications may require special pump designs or accessories to meet specific flow requirements.
Refer to relevant standards and codes: Consult relevant standards and codes, such as industry standards or building codes, for guidance on flow requirements for the respective industry.
4. Determine the head requirements of the mixed flow pump
Determine the maximum and minimum head range required. Head is the pressure lift required for the liquid to move from the inlet to the outlet of the pump. Determine the required head range based on specific application needs and liquid transfer requirements.
Consider head changes and adjustment needs. Certain applications may require head adjustments for different operating conditions or different height differences. Understanding these variations will help determine the desired head range and sizing options.
Consider piping and system constraints. Evaluate piping and system factors such as pipe lengths, height differences, pipe diameters, and drag losses. These factors will affect the head of the pump and additional pump lift may need to be considered.
Consider the properties of liquids. Learn about the viscosity, density and special requirements of liquids. Certain applications may require special pump designs or accessories to meet specific head requirements.
Refer to relevant standards and specifications. Consult relevant standards and codes, such as industry standards or building codes, for guidance on head requirements for the respective industry.
5. Environmental requirements for mixed flow pumps
Mixed flow pumps have some requirements on the environment during installation and operation. The following are the environmental requirements for some common mixed flow pumps:
Temperature requirements: Mixed-flow pumps usually have certain temperature range requirements, including the temperature of the working environment and the temperature of the liquid being transported. Ensure normal operation within the allowable temperature range to avoid performance loss or equipment damage.
Power supply: A reliable power supply is often required. Make sure that the power supply system can meet the power demand of the mixed flow pump, and maintain a stable voltage and frequency to ensure the normal operation of the pump.
Noise control: The mixed flow pump will produce certain noise during operation. In noise-sensitive areas or where a low-noise environment is required, appropriate noise control measures such as sound enclosures or vibration dampening devices are required.
Vibration control: The vibration of the mixed-flow pump should be controlled within a reasonable range to reduce the mechanical stress of the equipment and the transmission of vibration to the surrounding structures. Appropriate vibration control measures can include vibration damping mounts, vibration monitoring and balancing treatments.
The pump needs regular maintenance and maintenance to ensure its proper operation and prolong its service life. Maintenance work includes cleaning, lubricating, tightening connections and checking various parameters of the pump, etc.
Safety requirements: Safety standards and specifications should be complied with to ensure safety during operation and maintenance. This includes protection against electric shock, fire and other potential hazards.
6. Consider choosing the size of the mixed flow pump
When considering the size of the mixed flow pump, there are many aspects to consider:
Flow Requirements: First, determine the required maximum and minimum flow ranges. Select the appropriate mixed flow pump size based on the flow requirements of your specific application. Make sure that the rated flow range of the selected pump covers the flow requirements of the application.
Head Requirements: Determine the required maximum and minimum head ranges. Depending on the head requirements of the application, select a pump size with the appropriate head capability.
Pump Efficiency: Consider efficiency. Higher pump efficiency means less wasted energy and lower operating costs. Choose pumps with high efficiency to improve energy utilization.
Pump size and installation space: Consider available installation space and pump size limitations. Make sure that the selected mixed flow pump is sized for the installation space and can be installed and maintained smoothly.
Material selection: Select suitable materials according to liquid properties and application requirements. Consider factors such as the corrosiveness of the liquid, temperature and pressure, and select pump materials with corrosion resistance and adaptability.
Budget and economy: According to budget constraints and economic considerations, choose a reasonable size that meets budget requirements. At the same time, considering the operating cost and maintenance cost comprehensively, choose an economical and practical size.
7. Consider efficiency and energy consumption
Pump efficiency: The efficiency of a mixed flow pump refers to the ability of the pump to convert the input power into useful liquid power. Higher pump efficiency means more efficient use of energy when transferring liquids, reducing energy waste and operating costs. Therefore, choosing a mixed-flow pump with higher efficiency can reduce energy consumption.
Comparing the Efficiency of Different Models and Brands: When selecting a mixed flow pump, it is important to compare the efficiency of different models and brands. Consult the technical data and performance curves provided by the suppliers to compare the efficiency indicators of different pumps. Choose a pump with higher efficiency for more energy-efficient operation.
Part Load Efficiency: Consider the efficiency of a mixed flow pump at part load conditions. Some applications may require operation over different operating conditions or flow ranges. Make sure the selected pump is still highly efficient at part load to reduce energy consumption.
Frequency conversion speed regulation: consider using frequency conversion speed regulation technology to control the speed of the mixed flow pump. By adjusting the operating speed of the pump according to actual demand, higher efficiency can be achieved under different working conditions and energy consumption can be reduced. Frequency control also provides more precise flow control.
Energy cost and operating cost analysis: Consider the energy cost and the operating cost of the pump together. While an efficient mixed flow pump may have a high initial investment, it can save energy costs and maintenance costs in the long run. Conduct energy cost and operating cost analyzes to evaluate the economics of different pump options.
8. Recommendations for Selecting a Mixed Flow Pump Manufacturer
After all, choosing a suitable mixed-flow pump manufacturer is not a simple matter, and it needs to be investigated from many aspects:
Brand Reputation: Choose a manufacturer with a good reputation and popularity. These brands usually have a long history and reliable product quality in the market, and can provide high-quality pump products and reliable after-sales service.
Technical Capabilities: Consider the manufacturer's technical capabilities and innovation capabilities. They should have advanced design and manufacturing capabilities and be able to provide high-efficiency pump products that meet modern engineering requirements.
Product Quality: Evaluate the manufacturer's product quality management system. Learn about their production process, quality inspection standards and product certification. Choose a manufacturer with high quality standards and strict quality control to ensure the reliability and durability of the selected pump.
Technical support and after-sales service: Consider the technical support and after-sales service provided by the manufacturer. They should be able to provide timely technical advice, training and maintenance support. Check out customer testimonials and feedback to see how a manufacturer is doing in terms of after-sales service.
Experience and expertise: Choose a manufacturer with extensive experience and expertise. They should understand all aspects of mixed flow pump applications and be able to provide customized solutions based on specific needs.
See what other users say: Find reviews and opinions from other users about their experiences and satisfaction with a particular manufacturer. This can help assess the credibility and reliability of the manufacturer.
Price and cost performance: comprehensively consider price and cost performance. Choose the balance between the product quality, technical support and after-sales service offered by the manufacturer and its price. Not only the initial investment cost, but also the long-term operating and maintenance costs must be considered.
9. Top 5 Mixed Flow Pump Manufacturers
1. LIANCHENG GROUP
Established: 1993
Location: No. 3616-3618, Cao'an Road, Jiangqiao District, Shanghai
Main Products:
Company Profile:
Founded in 1993, Shanghai Liancheng (Group) Co., Ltd. is a large-scale enterprise specializing in R&D and manufacturing of pumps, valves, environmental protection equipment, fluid delivery systems, and electronic control systems. It is also a world-leading manufacturer of mixed-flow pumps . The product category covers more than 5,000 series, which are widely used in national pillar industries such as municipal administration, water conservancy, construction, fire protection, electric power, environmental protection, petroleum, chemical industry, mining, and medicine.
LIANCHENG GROUP has more than 2,000 sets of advanced production and testing equipment such as national "first-class" water pump testing center, horizontal machining center, laser rapid prototyping machine, CNC vertical lathe, CNC vertical turning center, and CNC horizontal double-sided boring , CNC pentagonal gantry milling machine, gantry moving beam machine tool, gantry machining center, universal grinding machine, CNC automation line, laser pipe cutting machine, three-coordinate measuring instrument, dynamic and static balance measuring instrument, portable spectrometer, CNC machine tool cluster. They attach great importance to the innovation of core technology and continuously invest huge sums of money in technology research and development. Our products adopt CFD analysis method and pass the test to meet international standards.
LIANCHENG GROUP is committed to becoming a first-class manufacturer in the domestic fluid industry, adhering to the concept of harmonious coexistence between man and nature, focusing on the development of environmentally friendly and energy-saving products to improve the quality of human life.
They will take "100-year LIANCHENG" as the development goal, and strive to achieve "the water is deep because of LIANCHENG, and the water is far away because of LIANCHENG".
2. CRI PUMPS
Established: 1961
Location : 7/46-1, Keeranatham Road, Saravanapatti Coimbatore - 641 035.
Main Products ：
- Mixed flow pump
- centrifugal pump
- axial flow pump
- multistage pump
Company Profile :
Established in 1961, CRI Pumps is a leading manufacturer of mixed flow pumps based in India. Known for innovation, quality and reliability, the company provides a wide range of pump solutions to customers around the world. CRI Pumps' product line covers various types of pumps, including centrifugal pumps, plunger pumps, axial flow pumps, mixed flow pumps and multistage pumps, etc. These products are widely used in water supply system, drainage system, industrial fluid treatment, farmland irrigation and construction fields, etc.
As an innovation-driven company, CRI Pumps focuses on R&D and technological innovation. They have advanced research and development facilities and laboratories, and constantly introduce new products with high efficiency, energy saving and environmental protection. The company is committed to meeting the needs of customers and tailoring customized pump solutions for customers.
CRI Pumps are known for quality manufacturing and strict quality control. They use advanced manufacturing techniques and high-quality materials, ensuring the reliability and durability of their products. The company has an experienced engineering team that can provide professional technical support and after-sales service to ensure customer satisfaction. Through years of development and expansion, CRI Pumps has established a worldwide sales and service network. Their products are exported to many countries and enjoy a good reputation and a wide customer base worldwide.
3. Pacific Pump Group
Established: 1995
Location : No. 25, Lane 7488, Hutai Road, Shanghai
Main Products ：
- axial flow pump
- submersible pump
- water pump
- vacuum pump
Company Profile :
Shanghai Pacific Pump Manufacturing (Group) Co., Ltd. is one of the leading mixed-flow pump manufacturers in China, specializing in the production of centrifugal water pumps, submersible pumps, fire pumps, water supply systems and control panels in various specifications. Pacific Pump is headquartered in Shanghai. We have four pump and motor factories in Shanghai and Wenzhou. The company integrates scientific research, development, production, sales and service. The main products are centrifugal water pumps, fire pumps, sewage pumps, chemical pumps, gear pumps, screw pumps, diaphragm pumps, vacuum pumps and other eight series. They also manufacture control panels and booster pump systems.
With strong technical strength, advanced production, inspection and testing equipment, scientific management methods, stable and reliable product quality and perfect after-sales service, our pumps are widely used in different fields such as petroleum, chemical industry, metallurgy, mining, power generation, Garden sprinkling, pressurized water supply for high-rise buildings and fire protection systems, industrial and urban water supply and drainage, textile industry, papermaking, long-distance water delivery for restaurants, bath centers and hotels, urban construction and agricultural drainage and irrigation and other related fields.
The company has passed ISO9001:2015, ISO14001, OHSAS18001 and CE certification. Their fire pumps are manufactured to NFPA20 standards and some fire pumps are UL Listed. It has successively won national, provincial and municipal new product awards, quality trustworthy enterprises and other honors. Shanghai Pacific Pump enjoys a high reputation in the field of international pump manufacturing.
4. BELLFLO
Established: 2001
Location ：511 Yishun Industrial Park A, #01-02, Singapore 768768
Main Products ：
- multistage pump
- submersible pump
- Unit pump
- axial flow pump
Company Profile :
They are a reliable mixed flow pump supplier in Singapore and a trustworthy one-stop solution provider for most of the needs of the industry, providing quality and reliable pumps, they have been involved in this field since 2001, and have accumulated expertise. They select pumps and their systems with great care. They serve their customers with empathy and help them choose the right pump.
They have the pump expertise and should be able to select and supply the most suitable pump for your pumping application at a competitive price and with stock or the earliest possible lead time for standard pumps. And will be able to provide viable pump solutions and professional services for very demanding applications. Supported by a professional network of partners, they can also provide pump testing and pump repair services.
They supply Seawater Cooling Pumps, Axial Flow Pumps, Water Transfer Pumps, HVAC Water Circulation Pumps, Oil Transfer Pumps, Well Pointing Pumps, Self Priming Sewage Transfer Pumps and many more types. Our range of pumps includes end suction centrifugal pumps, self priming centrifugal pumps, gear pumps, lobe pumps, high pressure triplex piston pumps, vacuum assisted self priming centrifugal pumps, rotary blowers and more...
5. JIANGSU FEIYUE MACHINE AND PUMPS
Established: 1957
Location : No. 96 Feiyue Road, Xinqiao Industrial Zone, Jingjiang City, Jiangsu Province
Main Products ：
- Axial mixed flow pump
- petrochemical pump
Company Profile :
This company is a leading manufacturer of mixed flow pumps, specializing in production, R&D and sales. Over the years, the company has been appraised as a "contract-honoring and trustworthy" unit in Jiangsu Province for many times, and its "Feiyue" trademark has been recognized as a famous trademark in Jiangsu Province. The company's main products cover various high-temperature, high-pressure, low-temperature, wear-resistant and corrosion-resistant pumps and valves. These products enjoy a high reputation and popularity in the market. Their pump products have participated in the launch of Chinese carrier rockets many times, so they have been congratulated and awarded by the Central Committee, the State Council and the Central Military Commission. This is an affirmation of the company's technical strength and product quality.
With the aim of technological innovation, reliable quality and customer satisfaction, they are committed to providing customers with high-quality pump and valve solutions. They have a professional R&D team and advanced production equipment to ensure the quality and reliability of products.
Conclusion:
Selecting the right mixed flow pump is critical to the efficient operation of fluid transfer and circulation systems. When choosing a mixed flow pump, we need to comprehensively consider factors such as flow requirements, head requirements, environmental requirements, size requirements, energy efficiency and economy. At the same time, choose a reputable manufacturer and consider its technical capabilities, product quality and after-sales service to ensure reliable and high-quality mixed-flow pumps. By comprehensively considering these factors, we can choose the mixed flow pump that best suits the needs, and realize an efficient and reliable fluid delivery and circulation system.
