-
Product
-
-
Service Policy
-
-
Blog
-
Join Us
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
DGP-type Self-balancing Multistage Boiler Feed Pump
Flow rate: 3.7–1350 m³/h
Head: 73–1800 m
Power: 5.5–4500 kW
Efficiency: 32%-84%
Pump weight: 158–6256 kg
Cavitation margin: 2.0–7.0 m
Price: 31,200–288,000
The DGP-type self-balancing multistage boiler high-pressure feedwater pump is primarily used to convey clean water or liquids with physicochemical properties similar to clean water, at temperatures ranging from -20℃ to 210℃ and free of solid particles. It is suitable for medium-, low-, and high-pressure feedwater applications.
Hotline:
Self-balancing multistage pump
Horizontal Single-Stage Fire Pump
Product Overview
The DGP-type self-balancing multistage boiler high-pressure feedwater pump features a rotor assembly with symmetric impellers arranged at each stage. It eliminates the conventional balance disc mechanism found in traditional multistage boiler high-pressure feedwater pumps. As a result, the axial forces generated during operation are mutually canceled and essentially achieve self-balancing. This ensures that the alignment between the impellers and guide vanes remains consistently balanced, thereby significantly improving the pump’s operational efficiency. This pump represents an innovative structural design within the multistage boiler high-pressure feedwater pump series and is one of the models under the self-balancing multistage pump family. It serves as an alternative to multistage pumps that rely on balance discs or balance drums. Moreover, self-balancing technology is poised to become the future trend in the field of multistage centrifugal pumps.
|
↑Animated demonstration of the DGP-type self-balancing multistage high-pressure boiler feed pump↑ |
↑On-site operation of the DGP-type self-balancing multistage high-pressure boiler feedwater pump↑ |
The DGP-type self-balancing multistage boiler high-pressure feedwater pump is primarily used to convey clean water or liquids with physicochemical properties similar to clean water, which contain no solid particles and have temperatures ranging from -20℃ to 210℃. It is suitable for medium-, low-, and high-pressure feedwater applications.
Model Description for DGP Self-Balancing Multi-Stage High-Pressure Boiler Feed Pumps
DGP46–50×8
DGP—Self-balancing Multistage Boiler Feed Pump
46 - Flow rate (m³/h)
50 – Single-stage head of the pump (m)
8 - Pump stages
↑Factory photo of the DGP-type self-balancing multistage high-pressure boiler feedwater pump↑
Cost Analysis of DGP-Type Self-Balancing Multistage Boiler High-Pressure Feedwater Pumps vs. Traditional Boiler High-Pressure Feedwater Pumps
As shown in the comparison above, the main advantages of the self-balancing multistage system over the traditional multistage system are:
1. Highly efficient and energy-saving, with significant power-saving effects.
Due to the reduced shaft power, the pump's power consumption per unit time decreases, resulting in a significant reduction in operating costs.
2. Advanced structure with a long maintenance-free period.
Due to the absence of balancing devices, the hydraulic system has fewer vulnerable parts, boasts long trouble-free operating hours, and significantly reduces maintenance and repair costs.
Structural Design of the DGP-Type Self-Balancing Multi-Stage High-Pressure Boiler Feed Pump
This pump model is a horizontal, sectional, self-balancing multistage pump. The pump’s suction inlet can be arranged vertically upward or horizontally, while the discharge outlet 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 forward impellers mounted on the shaft, throttling and pressure-reducing devices, reverse impellers, shaft sleeves, bearing sleeves, and other components. 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. A sealing ring and guide vane sleeves are installed between the rotating and stationary parts to ensure effective sealing.
Main configurations of the DGP-type self-balancing multistage high-pressure boiler feedwater pump
The minimum material configuration for this pump model is cast steel; stainless steel can be used upon customer request.
The uniqueness of the DGP-type self-balancing multistage high-pressure boiler feedwater pump
This pump model introduces an innovative structural design based on the conventional multistage centrifugal pump. It eliminates the axial force balancing mechanism typically found in multistage pumps, making it a viable replacement for D- and DG-type multistage centrifugal pumps that rely on balance discs or balance drums. Since this pump is devoid of any balancing device—therefore eliminating both disc friction losses associated with balance discs and return flow losses from balancing systems—it achieves a 5% to 14% higher efficiency compared to similar multistage pumps. Moreover, it completely resolves various failures—such as wear on the balance disc and its seat or rotor seizure—that often occur when the balancing device fails, thereby significantly extending the pump’s service life.
Product Parameters
Performance Parameters of DGP-Type High-Temperature Self-Balancing Boiler Feed Pump
| Model Series |
Flow range (m³/h) |
Head range (m) |
Efficiency range (%) |
Matching power range (kw) |
| DGP6-25 | 3.75~7.5 | 70.35–320.3 | 36~49.5 | 5.5 to 18.5 |
| DGP6-50 | 3.75~7.5 | 144~624 | 28~30 | 15~55 |
| DGP6-80 | 3.75~7.5 | 225~982 | 32~36 | 15~75 |
| DGP12-25 | 7.5–15 | 68.3–325.3 | 43.3–52.1 | 7.5–30 |
| DGP12-50 | 7.5–15 | 142.7~635 | 30.6–44.6 | 18.5~75 |
| DGP12-80 | 7.5–15 | 225~982 | 37~40 | 30~132 |
| DGP25-30 | 15~30 | 77.7~418.8 | 55.2–56.9 | 15~55 |
| DGP25-50 | 15~30 | 144~618 | 44~54 | 22~110 |
| DGP25-80 | 15~30 | 228~1013 | 47–56 | 37~160 |
| DGP46-30 | 30~55 | 76.2~429 | 60~66.8 | 22~90 |
| DGP46-50 | 30~55 | 138.3–658.8 | 53.6–64.5 | 37~160 |
| DGP46-80 | 30~55 | 228~1056 | 59–65 | 55~250 |
| DGP65-80 | 50~75 | 228~1056 | 60–67 | 75~315 |
| DGP85-45 | 55~100 | 121.8~612 | 64.2–70.4 | 55~200 |
| DGP85-67 | 55~100 | 186.9~888 | 56.1–68.4 | 90~315 |
| DGP85-80 | 55~100 | 228~1056 | 59~71 | 110~450 |
| DGP85-150 | 55~100 | 429~1872 | 53~60 | 220~900 |
| DGP100-55 | 85~120 | 147~708 | 64.4–68 | 90~315 |
| DGP120-50 | 96~140 | 126.9~654 | 72~78 | 90~280 |
| DGP120-67 | 96~140 | 183–840 | 62–71 | 110~450 |
| DGP120-80 | 96~140 | 216~1056 | 61.6–70.4 | 132~560 |
| DGP120-100 | 96~140 | 261.6–1320 | 69.5~73 | 220~900 |
| DGP150-50 | 120~180 | 127.5–660 | 72~75 | 110~400 |
| DGP150-80 | 120~180 | 228~1056 | 65~75 | 185~710 |
| DGP150-100 | 120~180 | 261.6–1320 | 69.5~73 | 220~900 |
| DGP150-130 | 120~180 | 354~1644 | 62.5~64 | 315~1250 |
| DGP155-30 | 100~185 | 81.6–400.8 | 65.5–73.2 | 75~250 |
| DGP155-67 | 100~185 | 179.4–895.2 | 63–74 | 132~560 |
| DGP200-50 | 132~240 | 135~696 | 78–81 | 132~500 |
| DGP200-80 | 132~240 | 216~1044 | 70.9~75 | 220~900 |
| DGP200-100 | 132~240 | 252~1356 | 70~76 | 250~1000 |
| DGP280-43 | 185~335 | 116.1~564 | 70.5–76.7 | 160~630 |
| DGP280-65 | 185~335 | 184.5~816 | 63.3–74 | 250~1000 |
| DGP280-95 | 185~335 | 273~1200 | 68~72.5 | 400~1600 |
| DGP280-100 | 185~335 | 279~1248 | 58.6–72.6 | 400~1600 |
| DGP300-65 | 240~350 | 180~828 | 69.2–69.5 | 315~1120 |
| DGP360-40 | 300~440 | 106.5~504 | 77~80 | 185~710 |
| DGP360-60 | 300~440 | 157.5–768 | 71~74.5 | 355~1250 |
| DGP360-95 | 300~440 | 267~1224 | 70~73 | 500~2000 |
| DGP420-95 | 350~500 | 263~1192 | 67.9–71 | 560~2240 |
| DGP450-40 | 330~500 | 112.5~528 | 73.9–76.9 | 220~1000 |
| DGP450-60 | 335~500 | 162.9–765.6 | 74.1–78.9 | 355~1400 |
| DGP450-95 | 335~500 | 267~1200 | 72~75 | 560~2240 |
| DGP500-57 | 375~555 | 109.6–717.6 | 69.7–82.6 | 220~1400 |
| DGP550-40 | 400~600 | 76~528 | 75.1–78.4 | 185~1120 |
| DGP550-50 | 400~600 | 95~660 | 75.1–77.8 | 220~1400 |
| DGP550-95 | 400~600 | 182~1230 | 70.9–72.4 | 450~2800 |
| DGP580-60 | 450~640 | 113~780 | 75.5–76.8 | 280~1800 |
| DGP580-100 | 450~640 | 190–1284 | 70~74 | 500~2800 |
| DGP600-60 | 450~710 | 104~780 | 79–82 | 280~1800 |
| DGP600-85 | 450~710 | 162~1092 | 72.4–73.6 | 450~2800 |
| DGP650-80 | 540~715 | 154~1005 | 73.5–75.5 | 450~2800 |
| DGP650-100 | 540~715 | 193~1256 | 79.2–83 | 500~2800 |
| DGP720-60 | 550~850 | 106.8~738.1 | 79.2–82.4 | 355~2240 |
| DGP720-80 | 550~850 | 149~931.8 | 72.9~76 | 630~2800 |
| DGP720-100 | 550~850 | 186~1059 | 76.5–84 | 560~2800 |
| DGP800-80 | 620~900 | 150~951.5 | 73–81 | 500~2800 |
| DGP850-100 | 705~935 | 289~942 | 80~85 | 900~2800 |
| DGP900-60 | 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.
Previous Page
Previous Page
Product message
Contact our team promptly; we are happy to help you.
*Note: Please fill in the information accurately and keep the communication open. We will contact you as soon as possible.
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
Quick Navigation
Hot Products
Online Consultation
Powered by:www.300.cn Changsha SEO