Puede fabricar 26 series de productos, incluyendo bombas de circulación para grandes centrales eléctricas, bombas de condensación para grandes centrales eléctricas, bombas petroquímicas, bombas multietapa, bombas de aguas residuales y lodo, bombas multietapa autoequilibradas, bombas de doble succión y única etapa tipo split, y bombas centrífugas de succión simple y única etapa.
La elección de más de cientos de miles de clientes, cubriendo industrias como minería de carbón, metalurgia, química, energía, recursos hídricos, alimentos, municipalidades y protección ambiental, y exportando a Asia Sudeste, África, América y otros lugares.
La empresa fue la primera en la industria en obtener las certificaciones internacionales del sistema de calidad ISO 9001:2008, del sistema de gestión ambiental ISO 14001 y del sistema de gestión de seguridad y salud ocupacional GB/T 28001, además de la certificación API 610 de la Asociación Estadounidense del Petróleo.
La empresa, fundada en 1989, es una empresa nacional de alta tecnología integral que integra diseño, investigación y desarrollo, fabricación y servicios; actualmente es una empresa clave en la industria china de bombas centrífugas y una de las grandes fábricas especializadas.
Con productos innovadores, calidad excepcional y servicios integrales, buscamos la verdad y la pragmática, avanzamos con iniciativa, y nos esforzamos por lograr el objetivo de ser "la marca líder en el campo de aplicación de bombas centrífugas en el país"! Raigada en Hunan, orientada a todo el país y hacia el mundo!
Corrosion-resistant self-balancing multistage pump type DFP
Flow: 3.6-1346m³/h
Manometric height: 71-1795m
Price: 5.89-499,000
Motor power: 5.8-4500kw
Cavitation margin: 2.0-7.0m
Pump weight: 155-6260kg
Efficiency: 30%-82%
Made of cast stainless steel, with high corrosion resistance, practical safety, economy, fault-free operation capability, and low maintenance costs. Widely used for transporting corrosive liquids without solid particles, with a temperature range of -20 to 105℃.
As one of the recognized national manufacturers of multistage centrifugal pumps, to actively respond to the national call for energy saving and adherence to the sustainable development path, our company, after studying and adopting advanced technologies from similar foreign products and combining years of experience in pump design, has developed a series of high-efficiency and energy-saving self-balancing multistage pumps. This series of multistage pumps uses a hydraulic model recommended by the state, developed according to the API610 standard, with advantages such as high energy efficiency, wide performance range, reasonable structure, good cavitation performance, safe and stable operation, low noise, few wear parts, and easy installation and maintenance, positioning itself at the technological forefront of the industry.
The self-balancing multistage centrifugal pump innovates the traditional structure of multistage pumps, eliminating the axial force balancing device of common multistage pumps, and uses the mutual cancellation of the forces of symmetrically arranged impeller rotors to balance the axial force, effectively solving the axial displacement. During operation, there is no efficiency loss caused by the friction of the balancing disc or by backflow, increasing efficiency by 3-12% compared to common multistage pumps of the same category. In addition, it completely eliminates failures such as wear or blockage of the disc and balancing seat due to failures of the balancing device, significantly prolonging the pump's lifespan. After years of use by users, it has been proven that our self-balancing multistage pumps have much greater reliability and efficiency than traditional multistage pumps, with a fault-free operating time more than three times greater, effectively extending the lifespan, which not only saves production costs for users but also significantly reduces operating and maintenance costs. The corrosion-resistant self-balancing multistage pump type DFP is a model within this series designed to transport corrosive media. Classified as a corrosion-resistant pump according to its use, it has advantages such as uniform flow, simple structure, wide flow and height range, and easy maintenance. It can be used to transport corrosive slurries, various acids and alkalis in wet metallurgy, as well as seawater for desalination. Therefore, it is widely used in chemistry, metallurgy, mining, light industry, synthetic fibers, environmental protection, and food, being an excellent replacement for traditional DF type multistage pumps with disc or balancing drum structure.
Corrosion-resistant self-balancing multistage pump type DFP Scope of application
To transport corrosive liquids without solid particles, with a temperature between -20~105℃. Users can reasonably select the pump material, seal type, pump structure, and motor power according to the name, concentration, specific gravity, operating temperature, and inlet pressure of the transported medium.
Corrosion-resistant self-balancing multistage pump type DFP Description of the structure
The corrosion-resistant self-balancing multistage pump type DFP is supported at both ends, with a segmented casing. The pump transmission is connected to the motor via a pin elastic coupling. Direction of rotation of the pump: viewed from the drive end, the pump rotates clockwise.
1. Stator part
Mainly composed of the suction section (water inlet), middle section, discharge section (water outlet), guide vanes, secondary water inlet section, packing body (rear cover) and Bearing and other parts connected together by tension bolts. Viewed from the coupling end, the pump inlet is horizontally oriented to the right and the outlet vertically upwards.
2. Rotor part
Mainly composed of shaft, impeller, throttling shaft components, bearings, and sleeves.
3. Pump sealing
3.1 The static joint surfaces between the suction section (water inlet), middle section, discharge section (water outlet), and secondary water inlet section are sealed with sealing glue or molybdenum disulfide.
3.2 Throttling sealing is used between the stages of the pump.
3.3 The shaft seals on both sides of the pump use soft packings.
3.4 A water retaining ring is used to prevent water from entering the bearings.
4. Bearing part
The complete rotor of the pump is supported by a cylindrical roller bearing according to the standard 《GB/T283-94》 at the drive end and an angular contact ball bearing according to the standard 《GB/T292-94》 at the opposite end. The bearings are lubricated with mechanical oil CD30 or CD40 up to the center of the oil sight glass. Due to the use of the angular contact ball bearing according to 《GB/T292-94》, the assembled rotor does not exhibit axial displacement.
Corrosion-resistant self-balancing multistage pump type DFP Operating principle
The pump shaft, driven by the motor, rotates the impeller, doing work on the liquid and increasing its rotational energy at high speed, so that the required amount of liquid passes successively from the suction tank through the pump inlet section, direct impeller, direct guide vanes, middle section, horizontal outlet, transition pipe, secondary inlet section, reverse impeller, reverse guide vanes, to the vertical outlet, and then is discharged to the point of demand.
Self-balancing multistage pump VS traditional multistage pump 10 major advantages
1. New structure: The self-balancing multistage pump has rotor components with symmetrically arranged impellers, so that the axial forces generated by the direct and reverse impeller groups mutually cancel each other, eliminating the balancing disc device that has small spaces, high pressure drop, easy erosion, wear, and failures, overcoming the traditional structure of multistage pumps.
2. New technology: The self-balancing multistage pump has unique throttling devices, pressure reduction, and balance in odd stages, which also act as auxiliary support.
3. High efficiency and energy saving: The self-balancing multistage pump uses an advanced hydraulic model that resolves wear and axial pulsation caused by the balance disk, always maintaining excellent centering between the impeller and the guide vanes. During prolonged use, it also prevents significant efficiency loss caused by wear of the balance disk and forward displacement of rotor components in common multistage pumps, in addition to eliminating balance water leakage, reducing volumetric loss, generally improving the operational efficiency of the pump and reducing shaft power, with an average efficiency 3%-12% higher than that of common multistage pumps.
4. High reliability: The self-balancing multistage pump uses a self-balancing system that basically compensates for the axial force load generated during the operation of the pump, minimizing rotor wear and system interference. A small residual part of the axial force is supported by the thrust bearing, keeping the pump shaft always under tension, with a uniform force distribution and a significant reduction in the peak stress compared to the prototype structure, which improves the rigidity and critical speed of the rotor, significantly increasing the stability and reliability of the pump rotor operation.
5. High stability: The self-balancing multistage pump, thanks to the excellent symmetrical combination of the impeller and guide vanes, as well as a reasonable adjustment play and a wide axial throttling design, maintains high stability and operational efficiency even after prolonged operation.
6. Good performance against cavitation: The self-balancing multistage pump uses an optimized hydraulic model and structural design, with a double suction structure in the first stage impeller, along with precise casting and wear-resistant materials, giving it good performance against cavitation. The machine operates stably and with low noise, without the user needing to install an additional previous pump or raise the height of the inlet tank.
7. Mechanical seal High reliability: Because there is no axial displacement of the rotor during startup and shutdown in the self-balancing multistage pump, nor axial pulsation during operation, the problem of low reliability of the mechanical seal that has always affected multistage pumps has been overcome.
8. Easy maintenance: The self-balancing multistage pump uses a three-dimensional design for the entire machine, with rotor components machined by numerical control, strictly ensuring the dimensions and machining precision of each component. This allows for quick assembly and disassembly of the pump, and the replacement of seals and bearings without disassembling the pump body or the inlet and outlet pipes. General technical personnel can complete the process by following the order and requirements of the assembly diagram, completely avoiding the need for specialized personnel to adjust and position the axial displacement, providing great convenience to the user.
9. Low maintenance rate: The self-balancing multistage pump uses precise casting, reducing wear parts and the frequency of disassembly for maintenance, prolonging the product's lifespan and largely avoiding a series of problems caused by frequent disassemblies, reducing maintenance costs.
10. High adaptability: The self-balancing multistage pump uses an advanced combined modular design, with local components that have been tested in intensive use and prolonged operation. The parts have high interchangeability, eliminating the small space balance disk device, adapting to more severe medium conditions than traditional structured multistage pumps.
Self-balancing Comparative cost chart between self-balancing multistage pump and traditional multistage pump.
Product parameters
Meaning of the corrosion-resistant self-balancing multistage pump model type DFP
Self-balancing multistage corrosion-resistant pump model type DFP Parameters ( These data are for reference only, please take the actual order as the standard!
DF6-25P
DF6-50P
DF6-80P
DF12-25P
DF12-50P
DF12-80P
DF25-30P
DF25-50P
DF25-80P
DF46-30P
DF46-50P
DF46-80P
DF65-80P
DF85-45P
DF85-67P
DF85-80P
DF85-150P
DF100-55P
DF120-50P
DF120-67P
DF120-80P
DF120-100P
DF150-30P
DF150-50P
DF150-80P
DF150-100P
DF150-130P
DF155-30P
DF155-67P
DF200-50P
DF200-80P
DF200-100P
DF200-150P
DF280-43P
DF280-65P
DF280-95P
DF280-100P
DF300-45P
DF300-65P
DF360-40P
DF360-60P
DF360-95P
DF420-95P
DF450-40P
DF450-60P
DF450-95P
DF500-57P
DF550-40P
DF550-50P
DF550-95P
DF580-60P
DF580-100P
DF600-60P
DF600-85P
DF650-80P
DF650-100P
DF720-60P
DF720-80P
DF720-100P
DF800-80P
DF850-100P
DF900-60P
DF1100-85P
200DF43P
More Corrosion-resistant self-balancing multistage pump DFP For performance parameters, please visit the pump selection page Page Download the intelligent selection software 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
Q
What products do you mainly produce?
A
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.
Q
Can you help me choose a model?
A
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.
Q
Why is the price quotation so slow?
A
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.
Q
What information should I provide when I need a quote?
A
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.
Q
Do you have centrifugal pumps in stock?
A
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.
Q
What is your usual delivery time?
A
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 。
