Hunan PDM Machinery. Co., Ltd.

China Manufacturer with main products: Centrifugal Pump, Water Pump, Oil Pump, Split Case Pump, Mixed Flow Pump, Boiler Pump, Fire Fighting Pump, Multistage Pump

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self balance multistage pump

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Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe


Product Overview
DP Pump is a self –balancing multilevel boiler feed pump with single-suction, multievel and sectional structure. This series of pumps are suitbalbe for medium and low pressure boiler water feeding, and high-pressure boiler water feeding for thermal power plant, as well as high-lift water supply and drainage of factories and cities. They are used in transferring water or other liquid with similar physical and chemical properties to water. Temperature of media being transferred can vary from -20℃~160℃
This series of products in the design, production and testing, etc. mainly follow the belowing latest version standards and specifications:
Executive Standard
GB/T5657        ” Technical Conditions for Centrifugal pump (III)
JB/T1051-93      ”Types and Basic Parameters of Multi-stage pump for water”
GB/T13006        " NPSH of Centrifugal pump , mixed flow pump, axial flow pump”
GB/T13007        "Centrifugal pump efficiency”
GB/T3216-2005   “Rotodynamic Pumps-Hydraulic Performance Acceptance Tests-Grades 1 and 2”
The technical parameter of type DP pump
Medium and Low pressure pump
Pump inlet and outlet diameter:40-200mm
Capacity Q: 3.75~335m3/h
Head H: 92~760m
Motor Power N: 7.5~500kW
Second high-pressure pump
Pump Inlet and outlet diameter : 65~200mm
Capacity Q: 17.4~336 m3/h
Head H: 280-1110m
Motor Power N: 75~1250 kW
Type References
E.g. DP150-100X10
DP——refers to multilevel boiler feed pump
150——refers to design flow being 150 m3/h
100——refers to design single level lift being 100m
10 ——refers to levels of pump being 10
Technical advantage
Efficient energy-saving
Using advanced hydraulic model, independent R&D energy efficient products. Good centering of impeller and guid vane channel and efficiency will not significantly drop as balancing disc wears and rotor components move forward. No leakage of balancing water reduces loss of volume and improves pump efficincy and pump efficiency is on average 2-5% higher than normal DG pump.
New structure
With symmetrically arranged impeller rotor components, axial forces generated by all levels of symmetrical impellers forces offset each other and automatic balancing of huge axial thrust within pump cavity can be realized without the balcancing disc structure.
New technology
Unique throttling and pressure reduction devices, odd-lecel balancing device.
High reliability
By canceling easy-failing balancing disc, pump reliability is greatly improved, maintenance frequency and maintenance cost are reduced.
Low maintenance cost and long life time
By adopting precision casting and unique throttling and pressure reducing devices for auxiliary support, pump vibration and noise are greatly reduced and service life is prolonged.

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