DF Series Corrosion Resistant Horizontal Multistage Centrifugal Pump
Type DF pumps are horizontal multistage corrosion-resistant centrifugal pumps, specifically engineered for seawater desalination, brine mining, and salt chemical industries. Designed with a segmental casing and advanced balancing system, they are ideal for conveying high-salinity brine and aggressive chemical fluids. By utilizing high-grade materials such as Duplex Stainless Steel or SS316L, the DF series ensures exceptional durability and reliable high-pressure performance in environments prone to pitting and stress corrosion.
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Dải lưu lượng : |
3.75m³/h ~ 850m³/h |
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Phạm vi đầu: |
19m~816m |
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Công suất : |
3~1600kw |
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Nhiệt độ : |
≤ 80℃ |
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Material of wetted parts: |
Materials such as various grades of stainless steel, high-chromium stainless steel, high-chromium alloy, wear-resistant cast iron, or high-grade wear-resistant ductile iron may be used |
Introduction
The DF Series Corrosion Resistant Horizontal Multistage Centrifugal Pump is a high-performance fluid handling solution specifically engineered for the most demanding environments, including sea water desalination, brine mining, and salt chemical processing. Designed with a robust segmental casing (drum-type) structure, this horizontal multistage pump features Changyu’s innovative four-stage axial force balancing system (comprising a balancing drum, pressure adjustment ring, throttle plate, and precision positioning). This advanced technology achieves complete axial force neutralization, ensuring exceptional stability and a 15% increase in energy efficiency throughout its lifecycle, especially under fluctuating frequencies or abrasive conditions.
Built to withstand extreme salinity and chemical aggression, the Changyu DF series offers superior resistance to pitting and chloride-induced stress corrosion. With versatile material selections—including various grades of Stainless Steel, High-Chromium Alloys, and Duplex Steel—it ensures the safe and continuous transportation of corrosive fluids. The rotor and stator feature a differential hardness friction pair design, reducing clearance and increasing overall efficiency by over 3%. Whether applied in high-pressure reverse osmosis (RO), salt extraction, or aggressive chemical transfer, the Changyu DF series corrosion-resistant horizontal multistage centrifugal pump delivers reliable performance with flow rates ranging from 3.75 to 850 m³/h and heads from 19 to 816 m. Trust Bơm Changyu ISO-certified technology to minimize operational downtime and extend the service life of your critical industrial systems.
Parts of Horizontal Multistage Centrifugal Pump
Changyu Pump’s DF Series Corrosion Resistant Horizontal Multistage Centrifugal Pump is a high-performance fluid handling solution specifically engineered for the most demanding environments, including seawater desalination, brine mining, and salt chemical processing. Designed with a robust segmental casing (drum-type) structure, this pump features an innovative four-stage axial force balancing system that achieves complete axial force neutralization. This advanced technology ensures exceptional stability and a 15% increase in energy efficiency throughout its lifecycle, even under fluctuating frequencies or abrasive conditions.
Casing & Structural Components
- Suction Casing: Located at the pump’s inlet (typically on the left), it smoothly guides seawater or brine into the first-stage impeller.
- Stage Casing / Middle Section: Positioned between the suction and discharge sections with a “drum-type” design. Each section houses an impeller and diffuser, forming the core pressure-boosting zone.
- Discharge Casing: Located at the outlet (right side), it collects the pressurized liquid and directs it to the discharge piping.
- Tightening Bolts / Tension Rods: High-strength bolts that traverse the entire pump body, tightly securing the suction, stage, and discharge sections into a single pressure-resistant unit.
Rotor System – The Operational Heart
- Shaft: The central transmission component made of high-strength stainless steel or duplex steel, transmitting motor power to each impeller.
- Impellers: Arranged in series. Changyu Pump’s DF series utilizes precision-cast SS316L or duplex steel impellers to resist pitting in high-salinity media.
- Diffusers: Fixed within the stage casings to convert kinetic energy into pressure energy. Combined with differential hardness friction pairs, it boosts overall efficiency by over 3%.
Advanced Four-Stage Balancing System
- Stage 1: Balancing Drum
- Works with the balancing sleeve to offset approximately 70% of the axial thrust.
- Stage 2: Pressure Adjustment Ring
- Operates in tandem with the drum to neutralize another 20% of the force.
- Stage 3: Throttle Plate
- Precisely balances the remaining 10% of the axial thrust.
- Stage 4: Precision Positioning System
- Handles instantaneous thrust changes during frequency conversions or harsh startup conditions.
Sealing & Bearing Units
- Mechanical Seal: Positioned where the shaft exits the casing. High-performance corrosion-resistant seals are used for salt chemical processes to ensure zero leakage.
- Bearing Housing: Supports the high-speed rotation of the rotor. Thanks to the four-stage balancing system, bearing load is minimized, significantly extending service life.
Notice: Trust Changyu Pump’s ISO-certified DF Series Corrosion Resistant Horizontal Multistage Centrifugal Pump to minimize operational downtime and lower your total cost of ownership in high-salinity industrial applications.
Email: jade@changyupump.com
Điện thoại: +86-13651913727
Specifications
Technical Specifications: DF Series Horizontal Multistage Centrifugal Pump
| Parameter | Range & Specifications |
| Flow Rate | 3.75 m³/h – 850 m³/h |
| Head | 19 m – 816 m |
| Power Output | 3 kW – 1600 kW |
| Max. Working Temperature | ≤ 80°C |
| Balancing System | Innovative Four-stage Axial Force Balancing (15% Energy Saving) |
| Efficiency Boost | >3% (via Differential Hardness Friction Pairs) |
| Max. Inlet Pressure | Customizable (Please specify during inquiry) |
Detailed Material Configuration
To ensure maximum durability in aggressive environments like seawater desalination and brine mining, the Changyu DF Series offers specialized material selections:
- Casing & Impeller: Stainless Steel (SS304, SS316, SS316L), Duplex Stainless Steel (2205/2507), High-Chromium Alloy.
- Pump Shaft: High-strength Stainless Steel (2Cr13), SS304, or Duplex Steel for extreme torque and corrosion resistance.
- Static Sealing: Fluorine Rubber (Viton) / PTFE.
Standard Sealing Options
Mechanical Seal (Single/Double): Engineered for zero leakage in chemical processing and high-pressure salt chemical transfer.
Model Identification Code (Example)
To help our engineers select the right DF Series Corrosion-Resistant Horizontal Multistage Centrifugal Pump for your project, please refer to the following naming convention:
The example DF 280 – 43 x 5:
- DF: Series Name (Single-suction, Multistage, Segmental Corrosion-resistant Centrifugal Pump)
- 280: Design Flow Rate (m³/h)
- 43: Single-stage Head (m)
- 5: Number of Stages (Total Head = Single-stage Head × Number of Stages)
Due to the complexity of chemical media and the high-pressure requirements in desalination and brine mining, please contact our technical team with your specific liquid concentration and inlet pressure. We provide customized solutions to lower your total cost of ownership.
Email: jade@changyupump.com
Điện thoại: +86-13651913727
Advantages of Horizontal Multistage Centrifugal Pump
Innovative Four-Stage Balancing System
Featuring an exclusive four-stage axial force balancing technology (balancing drum + pressure ring + throttle plate + precision positioning), the DF series achieves 100% axial force neutralization. This ensures exceptional stability and reliability even under harsh conditions like variable frequency operation or fluids with impurities.
Superior Corrosion Resistance
Specifically engineered for seawater desalination, brine mining, and salt chemicals, the pump components are precision-cast from high-grade materials such as SS316L or Duplex Stainless Steel. This provides ultimate protection against pitting and chloride-induced stress corrosion.
High-Efficiency & Energy Saving
Utilizing a state-recommended hydraulic model and multi-streamline transition technology, the Changyu DF series reduces energy loss and boosts overall efficiency by over 3%. This advanced design delivers a 15% increase in energy saving across the entire equipment lifecycle.
Simplified Maintenance & Durability
The modular design is compatible with traditional balancing disk installation dimensions, allowing for quick replacements and minimal downtime. With a differential hardness friction pair design for the rotor and stator, the DF series significantly extends service life and reduces labor costs.
Applications: Horizontal Multistage Centrifugal Pump
Changyu Pump’s DF series horizontal multistage centrifugal pumps provide high-efficiency, high-pressure fluid handling solutions. Specifically engineered for extreme corrosion resistance and durability, they are widely used across multiple high-salinity sectors to ensure the safe and stable transportation of aggressive media.
Sea Water Desalination
High-pressure Reverse Osmosis (RO) feed pumps and concentrated brine transportation.
Brine Mining & Salt Chemicals
Extraction and circulation of high-concentration salt solutions and aggressive chemical fluids.
Metallurgy & Mining
Drainage of corrosive mine water and acidic liquid transfer in smelting processes.
Industrial Wastewater Treatment
Handling of high-salinity wastewater and chemical-heavy industrial discharge.
Leading Manufacturer of High-Performance Horizontal Single stage Centrifugal Pumps
Founded in 2006, Anhui Changyu Pump and Valve Manufacturing Co., Ltd is a premier national high-tech enterprise dedicated to the R&D and precision manufacturing of industrial pumps. With over two decades of deep-rooted expertise, we operate a 20,000 m² state-of-the-art facility, delivering more than 20,000 units annually to global markets. We are recognized as a pioneer in the industry, particularly for our breakthroughs in high-pressure multistage pump technology.
Our DF series of corrosion-resistant horizontal multistage centrifugal pumps are our classic bestsellers. Supported by ISO 9001, CE, and over 50 independent patents, Changyu Pump provides reliable solutions for the most challenging fluid environments. From seawater desalination to complex brine mining, our mission is to ensure safe, energy-efficient, and leak-free transportation of aggressive media.
Factory Show
Câu hỏi thường gặp
Project Showcases
From large-scale seawater desalination plants to complex brine mining and salt chemical processing, our extensive library of real-world applications demonstrates the exceptional reliability, efficiency, and long-term durability of the Changyu DF series. Our fluid solutions are engineered to thrive in diverse and high-pressure environments where standard pumps fail.
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