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Having 26 series -312 varieties - over 1000 pump models
Focused on water pump research and development manufacturing for 36 years
Free training for operation and maintenance personnel/free installation guidance/free provision of installation drawings
DFP-type Self-balancing Horizontal Multistage Chemical Centrifugal Pump
Traffic: 3.7–1350 m³/h
Head: 73-1800m
Power: 5.5-4500kw
Efficiency: 32%-84%
Pump weight: 158-6256kg
Cavitation margin: 2.0-7.0m
Price: 56,800–68,200
Hotline:
Chemical pump
Horizontal Single-Stage Fire Pump
Product Overview
The DFP-type self-balancing horizontal multistage chemical centrifugal pump is a horizontal, single-suction, multistage, segmental, corrosion-resistant chemical centrifugal pump. It is an efficient, energy-saving, high-temperature and high-pressure multistage centrifugal pump product developed by Zhonglian Pump Industry, a manufacturer of chemical pumps. This pump is designed for conveying corrosive liquids that contain no solid particles and have temperatures below 80°C. The allowable inlet pressure of the pump is less than 0.6 MPa. Horizontal multistage. Chemical pump Made from stainless steel, this pump boasts excellent corrosion resistance, as well as practical safety, cost-effectiveness, reliable operation without failures, and low maintenance costs. Users can reasonably select the pump material, sealing type, pump design, and motor power based on factors such as the name of the conveyed medium, its concentration, specific gravity, operating temperature, and inlet pressure of the pump.
Unique Performance of the DFP Self-Balancing Horizontal Multistage Chemical Centrifugal Pump
1. Advanced modular design featuring a large number of locally tested components that have undergone long-term operational verification, with highly interchangeable parts and components.
2. The pump features high-strength, high-quality materials as well as a variety of options for inlet and outlet flanges and connection pipe designs, significantly increasing the pump’s allowable connection load. The pump’s high-strength, high-quality casing material boasts a tightly structured design with a service life five times longer than that of conventional castings. The impeller and guide vanes—parts that come into direct contact with the fluid—are manufactured using precision casting, resulting in a smooth, even surface that improves efficiency by more than 2% compared to conventional castings. The pump can readily meet users’ specific system requirements under special conditions.
3. The quick assembly and disassembly design allows the pump to replace seals and bearing components without removing the pump body or the inlet and outlet pipelines, thereby minimizing downtime for major overhauls and inspections.
Meaning of the Model Designation for DFP Self-Aligning Horizontal Multistage Chemical Centrifugal Pump
Example: DFP85-80x10
DFP—Self-balancing, corrosion-resistant horizontal multistage Chemical pump
85—represents the pump’s design-point flow rate.
80—represents the head at the single-stage design point of the pump.
10——indicates the number of stages of the pump
Main Structure of the DFP Self-Balancing Horizontal Multistage Chemical Centrifugal Pump
The DFP-type self-balancing horizontal multistage chemical centrifugal pump belongs to... Self-balancing multistage pump It is a horizontal, sectional multistage centrifugal pump with either single-suction or double-suction inlet. The pump’s suction port can be arranged vertically upward or horizontally, while the discharge port is positioned vertically upward. The main components include: the suction section, the middle section, the discharge section, the secondary suction section, forward guide vanes, reverse guide vanes, forward impellers, reverse impellers, shaft, throttling and pressure-reducing devices, sleeve bearings, bearing housings, transition pipes, and other parts. The middle section is connected to the suction and discharge sections via high-strength through-bolts. The sealing surfaces between the suction section, middle section, and discharge section all employ hard metal seals lubricated with molybdenum disulfide grease. The rotor consists of components mounted on the shaft, including forward impellers, throttling and pressure-reducing devices, reverse impellers, shaft sleeves, and bearing sleeves. The bearings adopt a “fixed-floating” dry-lubrication design: the drive end uses cylindrical roller bearings, while the tail end employs angular contact ball bearings. The pump’s working chamber comprises the suction section, middle section, discharge section, secondary suction section, forward guide vanes, reverse guide vanes, and transition pipes.
↑Structural Diagram of the DFP-Type Self-Balancing Horizontal Multistage Chemical Centrifugal Pump↑
The rotor section of the DFP-type self-balancing horizontal multistage chemical pump is sealed between the rotating and stationary parts by means of sealing rings, guide vane sleeves, and other components. When the wear level of the sealing rings and guide vane sleeves has begun to affect the pump’s operational performance, they should be replaced promptly.
There are two types of shaft seals: mechanical seals and packing seals. When a pump is equipped with a packing seal, the packing rings must be properly positioned, and the tightness of the packing should be just right—ideally allowing liquid to seep out drop by drop. All sealing components of the pump are housed within a sealing chamber, which is supplied with water at a certain pressure to serve as a water seal, provide water cooling, and offer water lubrication. A replaceable shaft sleeve is installed at the shaft seal area to protect the pump shaft.
The pump’s bearings and seals can be replaced without dismantling the inlet and outlet pipelines.
This series of pumps is directly driven by the prime mover via an elastic pin coupling or a diaphragm coupling. When viewed from the direction of the prime mover, the pump rotates clockwise.
DFP-type self-balancing horizontal multistage chemical centrifugal pump vs. balance-disc type horizontal multistage chemical pump
4. A combination of high efficiency, high reliability, and low cost. By optimizing the pairing of impellers and guide vanes, along with appropriately designed clearances and a wide axial throttling design, the ZPD-type high-pressure multistage centrifugal pump can maintain its high stability and extremely high operational efficiency even after prolonged operation.
5. The rotor assembly features symmetrically arranged impellers, with the impellers divided into high-pressure and low-pressure zones at both ends of the rotor. The axial forces generated by these zones mutually cancel each other out, achieving axial force balance. Any transient axial forces that arise during pump operation under varying conditions, as well as residual axial forces caused by manufacturing tolerances and helical seals, are borne by the thrust-bearing mechanism in the bearing assembly. This type of pump eliminates conventional axial-force balancing components such as balance discs or balance drums, thereby completely avoiding accidents—such as rotor seizure, component damage, shaft breakage, or even motor burnout—that can occur when the balance disc or balance drum fails temporarily due to changes in pump operating conditions.
Safe pump body sealing design. Depending on the pressure and structure of the pump, the pump body features either a metal-to-metal hard seal or an O-ring seal. Upon customer request, intermediate taps and a minimum-flow system can be added. The pump allows bearing and seal replacement without dismantling the inlet and outlet pipelines.
6. Excellent cavitation performance. By adopting an excellent impeller hydraulic model or a special double-suction impeller structure, users do not need to additionally install a booster pump or raise the height of the suction tank.
Main advantages of the DFP-type self-balancing horizontal multistage chemical centrifugal pump
The DFP-type stainless steel chemical centrifugal pump features a symmetrical design and eliminates the need for a balancing device, thereby virtually eliminating axial forces. Any residual axial force is borne by a pair of back-to-back angular contact ball bearings. Since there is no balancing device—no disc friction losses associated with balance discs and no balancing reflux losses—the pump efficiency is 3% to 14% higher than that of comparable multistage pumps. Moreover, the absence of a balancing device completely resolves various failures caused by the failure of the balancing device, such as wear on the balance disc and its seat or rotor seizure, thus significantly extending the pump’s service life. The pump boasts a uniquely robust structural design that allows each stage to achieve a head of up to 1.5 MPa (150 m), with an outlet pressure reaching as high as 15 MPa (total head of 1,500 m). Furthermore, the bearing and rotor assembly—a core component—is insulated from the effects of temperature fluctuations, giving it excellent resistance to thermal shock.
Product Parameters
Performance Parameter Table for DFP-Type Self-Balancing Horizontal Multistage Chemical Centrifugal Pump
Model | Flow range | Head range | Efficiency range | Matching power range |
DFP6-25 | 3.75–7.5 | 70.35–320.3 | 36~49.5 | 5.5 to 18.5 |
DFP6-50 | 3.75–7.5 | 144~624 | 28~30 | 15~55 |
DFP6-80 | 3.75–7.5 | 225~982 | 32~36 | 15~75 |
DFP12-25 | 7.5–15 | 68.3–325.3 | 43.3–52.1 | 7.5–30 |
DFP12-50 | 7.5–15 | 142.7~635 | 30.6–44.6 | 18.5~75 |
DFP12-80 | 7.5–15 | 225~982 | 37~40 | 30~132 |
DFP25-30 | 15~30 | 77.7~418.8 | 55.2–56.9 | 15~55 |
DFP25-50 | 15~30 | 144~618 | 44~54 | 22~110 |
DFP25-80 | 15~30 | 228~1013 | 47–56 | 37~160 |
DFP46-30 | 30~55 | 76.2~429 | 60~66.8 | 22~90 |
DFP46-50 | 30~55 | 138.3–658.8 | 53.6–64.5 | 37~160 |
DFP46-80 | 30~55 | 228~1056 | 59–65 | 55~250 |
DFP65-80 | 50~75 | 228~1056 | 60–67 | 75~315 |
DFP85-45 | 55~100 | 121.8~612 | 64.2–70.4 | 55~200 |
DFP85-67 | 55~100 | 186.9~888 | 56.1–68.4 | 90~315 |
DFP85-80 | 55~100 | 228~1056 | 59~71 | 110~450 |
DFP85-150 | 55~100 | 429~1872 | 53~60 | 220~900 |
DFP100-55 | 85~120 | 147~708 | 64.4–68 | 90~315 |
DFP120-50 | 96~140 | 126.9~654 | 72~78 | 90~280 |
DFP120-67 | 96~140 | 183–840 | 62–71 | 110~450 |
DFP120-80 | 96~140 | 216~1056 | 61.6–70.4 | 132~560 |
DFP120-100 | 96~140 | 261.6–1320 | 69.5~73 | 220~900 |
DFP150-50 | 120~180 | 127.5–660 | 72~75 | 110~400 |
DFP150-80 | 120~180 | 228~1056 | 65~75 | 185~710 |
DFP150-100 | 120~180 | 261.6–1320 | 69.5~73 | 220~900 |
DFP150-130 | 120~180 | 354~1644 | 62.5~64 | 315~1250 |
DFP155-30 | 100~185 | 81.6–400.8 | 65.5–73.2 | 75~250 |
DFP155-67 | 100~185 | 179.4–895.2 | 63–74 | 132~560 |
DFP200-50 | 132~240 | 135~696 | 78–81 | 132~500 |
DFP200-80 | 132~240 | 216~1044 | 70.9~75 | 220~900 |
DFP200-100 | 132~240 | 252~1356 | 70~76 | 250~1000 |
DFP280-43 | 185~335 | 116.1~564 | 70.5–76.7 | 160~630 |
DFP280-65 | 185~335 | 184.5~816 | 63.3–74 | 250~1000 |
DFP280-95 | 185~335 | 273~1200 | 68~72.5 | 400~1600 |
DFP280-100 | 185~335 | 279~1248 | 58.6–72.6 | 400~1600 |
DFP300-65 | 240~350 | 180~828 | 69.2–69.5 | 315~1120 |
DFP360-40 | 300~440 | 106.5~504 | 77~80 | 185~710 |
DFP360-60 | 300~440 | 157.5–768 | 71~74.5 | 355~1250 |
DFP360-95 | 300~440 | 267~1224 | 70~73 | 500~2000 |
DFP420-95 | 350~500 | 263~1192 | 67.9–71 | 560~2240 |
DFP450-40 | 330~500 | 112.5~528 | 73.9–76.9 | 220~1000 |
DFP450-60 | 335~500 | 162.9–765.6 | 74.1–78.9 | 355~1400 |
DFP450-95 | 335~500 | 267~1200 | 72~75 | 560~2240 |
DFP500-57 | 375~555 | 109.6–717.6 | 69.7–82.6 | 220~1400 |
DFP550-40 | 400~600 | 76~528 | 75.1–78.4 | 185~1120 |
DFP550-50 | 400~600 | 95~660 | 75.1–77.8 | 220~1400 |
DFP550-95 | 400~600 | 182~1230 | 70.9–72.4 | 450~2800 |
DFP580-60 | 450~640 | 113~780 | 75.5–76.8 | 280~1800 |
DFP580-100 | 450~640 | 190–1284 | 70~74 | 500~2800 |
DFP600-60 | 450~710 | 104~780 | 79–82 | 280~1800 |
DFP600-85 | 450~710 | 162~1092 | 72.4–73.6 | 450~2800 |
DFP650-80 | 540~715 | 154~1005 | 73.5–75.5 | 450~2800 |
DFP650-100 | 540~715 | 193~1256 | 79.2–83 | 500~2800 |
DFP720-60 | 550~850 | 106.8–738.1 | 79.2–82.4 | 355~2240 |
DFP720-80 | 550~850 | 149~931.8 | 72.9~76 | 630~2800 |
DFP720-100 | 550~850 | 186~1059 | 76.5–84 | 560~2800 |
DFP800-80 | 620~900 | 150~951.5 | 73–81 | 500~2800 |
DFP850-100 | 705~935 | 289~942 | 80~85 | 900~2800 |
DFP900-60 | 700~1000 | 168~786 | 76.2~78 | 710~2800 |
Friendly reminder: Click on the specific model series above to view more detailed specifications and performance curves, among other information.
Why choose us?
Changsha Zhonghlian Pump Industry Co., Ltd. was founded in 1989 and was independently established after the restructuring of Changsha Water Pump Factory. It is a comprehensive national high-tech enterprise integrating design, research and development, manufacturing, and service. The company was listed on the Hunan Provincial Equity Exchange on December 31, 2019, with the abbreviation "Zhonghlian Pump Industry" and the equity code: 600275HN. It is currently a key backbone enterprise in China's centrifugal pump industry and one of the major professional manufacturers of multi-stage pumps in the country. The headquarters is located in Changsha City, Hunan Province, a historical and cultural city in China.
Square meters of land area
100% factory pass rate
Square meters of land area
100% factory pass rate
Q
What is your typical delivery time?
A
Models in stock can be shipped the next day at the latest. All others are custom-made, with lead times generally ranging from 7 to 90 days depending on the product size and project specifics. Please contact our sales manager for details: 0731-88632200 。
Q
Do you have centrifugal pumps in stock?
A
Centrifugal pumps come in numerous models and configurations. Except for a small number of high-volume, standard models that are in stock, the vast majority are not stocked and are customized products. We need to select a pump based on your site's flow rate, head, media temperature, pH value, and installation conditions, etc., to determine the pump model and configuration before we can submit an order to the factory for production.
Q
What information should I provide when requesting a quote?
A
Generally, to obtain an accurate quotation, we recommend providing us with the following information: pump flow rate, head, on-site operating voltage and frequency, temperature, pH value, and solid particle content of the fluid being conveyed, and on-site installation conditions (horizontal or vertical installation), etc.
If you are not sure, don't worry, our business managers will assist you in determining this.
Q
What products do you mainly produce?
A
Zhonglian Pump Industry manufactures various large industrial centrifugal pumps. Main products include: self-balancing multi-stage pumps, multi-stage centrifugal pumps, single-stage centrifugal pumps, split-case pumps, chemical pumps, submersible pumps, pipeline pumps, long-shaft pumps, condensate pumps, etc.
Q
Why is it so slow to get a price quote?
A
Because centrifugal pumps are non-standard customized products with many models, the price range is also very large. Even for the same model, the price difference is also very large due to different materials and configurations. Taking the most common water 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 clarify the relevant information to give you an accurate price. Normally, if you provide relatively comprehensive information, we can quote within 5 minutes.
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Hotline:
+86 0731-88632200
Export Trade/Technical Support:
+86 153-4831-2290
Head Office Email:
zoomlian@yeah.net
No. 210, Huanbao Zhong Road, Yuhua District, Changsha City, Hunan Province, Leowoju Wisdom Valley Building B, 8th Floor
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