This section provides an overview for centrifugal pumps as well as their applications and principles. Also, please take a look at
the list of 58 centrifugal pump manufacturers
and their company rankings. Here are the top-ranked centrifugal pump companies as of September, : 1.CORNELL PUMP COMPANY, 2.Franklin Electric Co., Inc., 3.Graymills.
SGB contains other products and information you need, so please check it out.
Categories Related to Centrifugal Pumps
What Is a Centrifugal Pump?
A centrifugal pump is a type of pump that has an impeller-like impeller inside the pump casing. The casing has a volute shape and is also called a volute pump.
Liquid enters the impeller through the suction port at the center, and is propelled outward at high speed by the centrifugal action of rotation. As it passes through the volute chamber, it is gradually decelerated and converted to pressure.
There are two types of centrifugal pumps: single-stage with one impeller and multi-stage with two or more impellers. The multistage type increases pressure with each stage and is used when high pressure is required.
Uses of Centrifugal Pumps
Centrifugal pumps are often used when a high flow rate and low pressure are required. They are widely used in industrial applications such as drainage, boiler water supply, water supply and sewage, mining, and chemical industry. They are also used in agriculture, such as for irrigation, and for water supply and drainage of air conditioning units.
Centrifugal pumps are often used for relatively low viscosity solutions with a solids volume concentration of 20% or less in the liquid. Those with improved vane shapes and materials to resist wear and corrosion are used for transporting muddy water, sewage, slurries, and pulp mixtures, sand and gravel, coal, and other liquids. Furthermore, by reducing the number of blades and increasing the flow path area, they can be used to transport fish, oranges, etc. along with water.
Principle of Centrifugal Pump
Centrifugal pumps use centrifugal force to impart pressure and velocity energy to a fluid by rotating an impeller in a casing. It is then decelerated in the volute-shaped casing and the velocity energy is converted to pressure energy. This phenomenon is known as Bernoulli's theorem.
There are two types of impellers: a radial flow form with a two-dimensional curved surface in which the fluid flows in the radial direction, and a mixed flow form with a three-dimensional curved surface that changes from axial to radial in an incremental manner. This is an important element for efficiently converting velocity energy into pressure.
The casing is installed to form a spiral-shaped chamber outside the impeller. As the cross-sectional area gradually increases in the direction of rotation, the high-speed fluid ejected from the impeller by centrifugal force is gradually decelerated and the pressure (static pressure) increases.
There is a limit to the pressure that can be generated by a single impeller. If higher pressure is required, a multi-stage pump is used. In a multi-stage pump, the fluid leaving the first impeller is sucked into the second impeller to further increase pressure. This can be repeated several times to obtain high pressure.
Pump Structure
Pump construction is closely related to flow rate and head, and is an important selection criterion when choosing a pump. Centrifugal Pumps consist of an impeller and volute casing, shaft, bearings, drive coupling, and suction and discharge couplings, shaft sealing device, and if necessary, a pressure gauge, pressure sensor, and pressure switch.
There are pumps with non-rotating fixed guide vanes arranged around the periphery of the impeller. They are called diffuser pumps or turbine pumps and are part of the centrifugal pump family. The mechanism is similar to that of centrifugal pumps, but the fluid leaving the impeller is efficiently decelerated as it passes through the guide vane and the static pressure increases, resulting in higher overall efficiency.
Other Information on Centrifugal Pumps
Centrifugal Pumps and Cavitation
Since the pump structure is designed to convert liquid to pressure, problems can occur if gases are introduced into the pump or if gases are generated inside the pump. One of these problems is cavitation.
Cavitation in pumps is a phenomenon in which the pressure of a liquid drops rapidly inside the pump, and when it reaches saturation vapor pressure, the liquid vaporizes rapidly. Cavitation in centrifugal pumps occurs when the static pressure of the fluid decreases due to the increased velocity of the liquid flowing into the impeller and the static pressure near the inlet falls below the saturation vapor pressure of the fluid.
Repeated cavitation causes damage to the impeller, resulting in cavitation erosion. Vibration and noise are also generated, and performance is reduced. This leads to premature deterioration and destruction of the equipment, not only in the centrifugal pump but also in the pipes and valves.
Cavitation can be prevented by changing operating conditions, reducing resistance on the suction side, and improving the shape and area of the impeller so that the fluid pressure does not fall below the saturated vapor pressure.
Product Description
Brief introduction of Horizontal Mixed Flow Pumps:
A Horizontal Mixed Flow Pump is a kind of pump between single stage end suction centrifugal pump and horizontal axial flow pump. It has the characteristics of large flow rate, medium head, high efficiency and wide application range.
Horizontal mixed flow pumps are most commonly used in the process of flue gas desulfurization, so they are often called desulfurization pumps, FGD circulating pumps. Mixed flow pumps are suitable for solid-liquid two-phase flow of complex processes, which have the advantages of short axial size, stable operation, simple structure and convenient installation.
Applications of Horizontal Mixed Flow Pumps:
Our highly efficient, reliable solutions are used wherever desulfurization slurry medium need to be transported.
1. Coal-fired power station FGD
2. Post-combustion desulfurization
3. Super critical coal fired project
4. Absorber recirculation pump
5. Heating power fluidized bed boiler FGD project
6. Heating supply station boiler FGD project
7. Heating boiler FGD
8. Scrubber recycle pumps for Catalytic cracking project in petrochemical industry / R
efinery
9. Sintering FGD in iron and steel industry
10. Limestone-gypsum wet flue gas desulfurization
11. Smelting and electrolysis FGD
12. Copper smelter flue gas desulfurization project
13. Flue gas desulfurization unit for electrolytic aluminium industry
14. FGD for building material (glass and cement) furnaces
15. Dry clinker production line gas desulfurization project
16. Ship exhaust gas cleaning systems
17. FGD for other industrial furnaces
18. FGD for Roaster asphalt gas purification project
19. FGD for municipal solid waste incineration project
Mixed flow pumps made from cast iron could be used in Agricultural Drainage and Irrigation, Flood Prevention and Drainage, Water Conservancy Projects, Sewage Treatment, Power Plant and other cooling system.
Performance range of Horizontal Mixed Flow Pumps:
Product Parameters
Parameters of Chemical Centrifugal Pumps:
Flow rate:
Q= 500~ (m³/h)
Total head:
H=13~65 (m)
Pump speed:
n=490/980rpm
Fluid s.g.:
γ&#;1.5
Fluid temperature:
T=0~145ºC
Solid content:
&#;60%
Cl- concentration:
&#;ppm
Pump structure
Structure of the Horizontal Mixed Flow Pumps:
1 Front pump cover
8 Front bearing gland
2 Impeller nut
9 Bearing housing
3 Impeller
10 Shaft
4 Short shaft sleeve
11 Bearing box
5 Pump body
12 End bearing gland
6 End pump cover
13 Bracket
7 Mechanical seal
1 Front cover plate
2 Pump cover
3 Impeller
4 Pump casing
5 Rear pump cover
6 Mechanical seal
7 Shaft
8 Bearing pedestal
9 Bracket
The body of a horizontal mixed flow pump alongs the radial diffusion, so the axial size is short, the pump unit runs stably.
Detailed Photos
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Pump features
The Features of Chemical Centrifugal Pumps:
The hydraulic model is optimized by CFD,with excellent anti-cavitation performance.
The rotor part can be adjusted by the bearing housing,which enables the convenient method to recover the pump performance after slight abrasion of pump.
Axial direction adjustable rotor part. The gap between the impeller and the front cover can be adjusted to enable stable operation at high efficiency.
Pump diameter from 200 mm to 900 mm.A lot of real sales achievements for each specification.
The discharge direction can be customized based on the requirements of process.
Zigong Pump & Valve has conducted in-depth research on the hydraulic performance of mixed flow pumps. Our company and Southest University jointly set up the fluid laboratory, which makes extensive use of Computer Fluid Dynamics (referred to as CFD). CFD numerical simulation is used to study the fluid motion inside the pump body and test the efficiency and performance of the pump. It provides data support and theoretical basis for hydraulic optimization, impeller optimization and guide vane optimization of mixed flow pumps. The constant exploration of fluid machinery makes the mixed flow pumps produced by our company, with high efficiency, stable operation, far superior to the quality of similar products.
Experts in abrasion-resistant materials
We are experienced with the handling of limestone slurry and gypsum mixtures. Thanks to wear-resistant and corrosion-resistant materials developed, our desulfurization pumps own premium corrosion and wear resistance.
Cr30
Cr30 is a kind of high chromium corrosion-resistant and wear-resistant cast steel with ferrite matrix. It not only has the same general corrosion resistance as Austenitic stainless steel, but also has excellent resistance to chloride stress corrosion, pitting corrosion and crevice corrosion.
Cr30A
Cr30A is specially used in limestone slurry circulating pump for flue gas desulfurization in thermal power plants. After adding Ni and Cu elements, its resistance to chloride ion corrosion is greatly improved. Because this material has high hardness, corrosion resistance and corrosion resistance, it is used to manufacture the wearable plates, shafts and impellers of desulfurization mixed flow pumps.
Cr26
Cr26 is a chromium-based wear-resistant white cast iron with eutectic carbide M7C3 + austenite, which has an excellent performance of wear-resistant. The material has high chromium content and contains copper element. It has certain corrosion resistance and high temperature oxidation resistance, and could withstand large impact loads and wear of hard particles.
Cr33
Cr33 is composed of ferrite, austenite and carbides. It has a high hardness at the same time (HRC about 44), but also can adapt to a certain degree of acid corrosion (PH >2).
N
N is a special cast ferritic-austenitic duplex stainless steel, specially developed for flue gas desulfurization in coal-fired boilers. In the field of chloride solution containing solid, it has good wear and corrosion resistance, and excellent casting performance and mechanical properties.
CD4MCuN
CD4MCuN is a low-carbon duplex stainless steel whose wear and corrosion resistance are superior to ordinary stainless steel. It also has good resistance to stress corrosion in media containing chloride ions.
1. (00Cr25Ni6Mo3N)
It belongs to one of the second generation of duplex stainless steel, by adjusting the content of carbon, nitrogen and molybdenum, it has stronger pitting resistance and crevice corrosion resistance. It has strong resistance to chloride pitting and stress corrosion.
ASTM-A890 5A (00Cr25Ni7Mo4N) (ASF)
This super duplex stainless steel is designed for harsh media environments, especially chlorine-containing environments such as seawater.
MM4
It is austenitic duplex stainless steel, with good casting properties, high strength, toughness and hardness, can be welded. It not only has very good corrosion resistance, but also has good wear resistance.
17-4PH (0Cr17Ni4CuNb)
It is martensitic precipitation-hardened stainless steel, which has a low carbon content, a high chromium content, and also contains copper, which has strong corrosion resistance.
Based on CFD technology, Optimize pump hydraulic performance more efficiently.
Chemical centrifugal process pumps, the optimised hydraulic design delivers superior performance through high efficiency impellers and volutes casings, contributing to low energy consumption subsequent total cost of ownership. Adopting the optimization algorithm provided by Isight, it integrates the functional optimization platform of 3D modeling software Catia, grid division software ICEM and numerical simulation software CFX.
Pump Configuration:
Company Profile
We have eight modernized workshops covering 12,000 square meters, which producing ability was designed as pieces per year. The factory consists of foundry workshop, finish-machining workshop, plate welding workshop, assembly workshop and testing center. The maximum lifting ability for tramelling crane is 50 metric tons; There are 510 sets of large and essential processing facilities which enable the requirements for producing all kinds of industrial pumps.
Casting of parts and components is an important part of the industrial pump production process. The precise control of the pump material smelting and the flow path size of the over-current components is our key control program for the quality of the pump products. The annual production capacity of 8,000 tons of alloy cast iron and dozens of new casting equipment such as AOD refining furnace and spectrum analyzer, as well as a group of skilled stylists, ensure the excellent quality of our castings.
HOT SELLING PUMPS
CERTIFICATES & PATENTS
TESTING
The comprehensive pump testing center. Make sure the quality control can be refined in the material inspection,components check,performance test.
PACKAGING
Product is packaged according to the customer's needs. Plywood boes are used according to international regulations.
Why choose us?
5 DECADES
Established in , long history of pump making brings us rich experience, making us a professional pump manufaturer and ranking us as a famous pump factory in China.
500+ STAFFS
Well trained and professional engineers and workers guarantees the in time delivery and offers professional pump solutions to our clients.
m2 WORKSHOPS
Large and modernized workshops and facilities enables the efficient and strict QA&QC procedures and therefore assures the qualified products.
20+ BRANCHES
Established 20+ branches offices and subsidiaries throughout China, they offer closer and in time services to our clients. And our overseas customers are from different places of the world.
+ CLIENTS
Own more than clients both in China and overseas, which is an approval of our product quality and a praise of our service.
20+ PATENTS
Gained more than 20 patents, which is a strong proof of the ability of R&D and a backup of product quality.
FAQ
Product is packaged according to the customer's needs. Plywood boes are used according to international regulations.
Q: How long is your factory history?
A: Our factory was established in .
Q: How many staffs does your factory have?
A: We have around 500 staffs.
Q: What international certificates does your factory have?
A: We have API, CE, ISO...
Q: Does your factory have foundry for yourself?
A: We have our own two foundries in our factory.
Q: What after sales service your factory can provide?
A: Generally, most of the issues can be solved by free guidance of video calls. But paid site service is also available.
Q: What is your product warranty?
A: 12 months since commissioning or 18 months after shipment,whichever is earlier.
Q: What is your factory's annual output capacity?
A: Around 20,000 pcs of various type of pumps.
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