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Product Center
Horizontal self-balancing multistage chemical centrifugal pump type DFP
Flow: 3.7-1350m³/h
Lifting height: 73-1800m
Power: 5.5-4500kw
Efficiency: 32%-84%
Weight of the pump: 158-6256kg
NPSH (Margin against cavitation): 2.0-7.0m
Price: 5.68-68.2 million
Product description
The DFP type horizontal multi-stage self-balancing chemical centrifugal pump is a horizontal chemical centrifugal pump, single suction, multi-stage and segmented, resistant to corrosion. It is a high-efficiency, energy-saving, high-temperature, and high-pressure multi-stage centrifugal pump product developed by Zhonglian Pump Industry, used to transport corrosive liquids without solid particles and with a temperature below 80°C, with a permitted inlet pressure of less than 0.6MPa. Horizontal multi-stage. Chemical pump Made of stainless steel, with high corrosion resistance, practical safety, economy, failure-free operation capability, and low maintenance costs. Users can reasonably select the pump material, seal type, pump structure, and motor power according to the name of the transported medium, concentration, specific gravity, operating temperature, and pump inlet pressure.
Unique features of the DFP type horizontal multi-stage self-balancing chemical centrifugal pump
1. Advanced combined modular design, with extensive use of locally tested components for long-term operation, with high interchangeability of parts.
2. High-strength and high-quality materials, in addition to multiple options for inlet and outlet flanges and pipe design, which improve the high load allowed in the pump pipes. The structural material of the pump casing is of high strength and quality, with a compact structure and a lifespan five times greater than that of common cast parts. The flow parts, such as the impeller and guide vanes, are manufactured through precision casting, with smooth and flat surfaces that improve efficiency by more than 2% compared to common cast parts. It can meet the specific requirements of the system at any time under special user conditions.
3. Quick assembly and disassembly design, allowing seals and bearing components to be changed without disassembling the pump casing or the inlet and outlet pipes, ensuring minimal maintenance and inspection times.
Meaning of the model of the DFP type horizontal multi-stage self-balancing chemical centrifugal pump
Example: DFP85-80x10
DFP — indicates self-balancing, corrosion-resistant, horizontal, and multi-stage Chemical pump
85 — indicates the flow rate at the pump design point
80 — indicates the manometric height at the design point of one stage of the pump
10 — indicates the number of stages of the pump
Main structure of the DFP type horizontal multi-stage self-balancing chemical centrifugal pump
The DFP type horizontal multi-stage self-balancing chemical centrifugal pump belongs to self-balancing multi-stage pump is a segmented horizontal multi-stage centrifugal pump with single or double suction, with the suction inlet that can be oriented vertically upwards or horizontally, and the outlet oriented vertically upwards. It is mainly composed of: water inlet section, middle section, water outlet section, secondary water inlet section, front guide vanes, rear guide vanes, front impellers, rear impellers, shaft, throttler, pressure reduction device, check sleeve, bearing body, transition tube, and other parts; the middle section is connected to the inlet and outlet sections by high-strength bolts; the sealing surfaces between the inlet, middle, and outlet sections use hard metal seals lubricated with molybdenum disulfide grease; the rotor is composed of the front impeller mounted on the shaft, the pressure reduction device, the rear impeller, the shaft sleeve, the bearing check sleeve, and other parts; the bearing uses a "fixed-moving" dry lubrication structure, with cylindrical roller bearings at the drive end and angular contact ball bearings at the opposite end; the working chamber of the pump is formed by the inlet section, middle section, outlet section, secondary inlet section, front and rear guide vanes, and the transition tube.
↑Anatomical diagram of the structure of the DFP type horizontal multi-stage self-balancing chemical centrifugal pump↑
Between the rotating part and the fixed part of the DFP type horizontal multi-stage self-balancing chemical centrifugal pump, there are sealing rings and guide vane sleeves for sealing. When the wear of these rings and sleeves affects the performance of the pump, they must be replaced in time;
The shaft seal can be mechanical or packing. When the pump uses packing seal, the placement of the packing ring must be correct and the tension must be adequate to allow the liquid to leak drop by drop. The various sealing elements of the pump are installed in the sealing chamber, where water is introduced at a certain pressure to act as a water seal, cooling, and lubrication. In the shaft seal, there is a replaceable shaft sleeve to protect the pump shaft;
The pump allows changing bearings and seals without disassembling the inlet and outlet pipes.
This series of pumps is directly driven by the motor through an elastic pin coupling or a diaphragm coupling. From the direction of the motor, the pump rotates clockwise.
DFP type horizontal multi-stage self-balancing chemical centrifugal pump VS horizontal multi-stage chemical pump with balance disk
4. Combination of high efficiency, high reliability, and low cost. Through the combination of the impeller and guide vanes, as well as an adequate fit and a wide axial throttling design, the high-pressure multi-stage centrifugal pump type ZPD maintains high stability and very high operational efficiency even after prolonged operation.
5. The rotor with symmetrically arranged impeller has an impeller at both ends of the high and low-pressure zones, balancing the axial forces mutually. The instantaneous axial forces during the change of pump conditions and the residual axial forces caused by machining errors and helical seals are supported by the bearing thrust load mechanism. This type of pump eliminates the balance disk or drum for axial balance, completely avoiding instantaneous failures of the balance disk or drum that could cause rotor locking, part damage, shaft breakage, or even motor burning.
Safe sealing design of the pump casing. Depending on different pressures and structures, the casing uses hard metal-to-metal seals or O-ring seals. According to user requirements, intermediate take-offs and minimum flow systems can be added. The pump allows changing bearings and seals without disassembling the inlet and outlet pipes.
6. Good performance against cavitation. It uses an excellent hydraulic model of the impeller or a special double suction impeller structure, so the user does not need to install an additional pre-pump or raise the height of the inlet tank.
Main advantages of the self-balancing horizontal multistage chemical centrifugal pump type DFP
The DFP type stainless steel chemical centrifugal pump uses a symmetrical arrangement, eliminating the balancing device to practically eliminate axial force; the residual axial force is supported by a pair of angular contact ball bearings mounted back to back. Due to the absence of the balancing device, that is, without losses from friction of the balancing disc or losses from balancing reflux, the pump efficiency improves by between 3% and 14% compared to multistage pumps of the same category. Additionally, by not having a balancing device, the problems caused by failures in the balancing device that lead to wear on the balancing disc and its seat or the jamming of the rotor are completely resolved, significantly extending the pump's service life. Unique and robust structural design. It allows the pump to reach a manometric height per stage of up to 1.5 Mpa (150 m), with an outlet pressure of up to 15 Mpa (total height of 1500 m), and also ensures that the core assembly formed by the bearing and rotor is not affected by temperature changes, offering excellent thermal shock resistance.
Product Parameters
Performance parameter table of the multistage chemical centrifugal pump horizontal self-balancing type DFP
Model | Flow range | Lifting height range | Efficiency range | Compatible power range |
DFP6-25 | 3.75~7.5 | 70.35~320.3 | 36~49.5 | 5.5~18.5 |
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 |
Kind advice: click on the specific model series above to see more detailed parameters and corresponding performance curve graphs.
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.
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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 。
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