D(DG) Horizontal Multistage Centrifugal Pump
I. Overview
Horizontal multistage centrifugal pump has the advantages of high efficiency, wide performance range, stable operation, low noise, long service life, and convenient installation and maintenance. They are used to transport clean water or other liquids with physical and chemical properties similar to water. They are mainly applicable to water supply and drainage in high – rise urban buildings, fire – fighting water, factory and mine water supply, long – distance water transfer, water in production processes, heating and ventilation circulation, domestic water, and many other purposes.
II. Model Meaning
D (DG) 46 – 50×12
- “D (DG)” represents segmental boiler feed – water centrifugal pumps.
- “46 – 50×12”:
- “46” is not clearly defined in the given content in a specific way related to the following parameters in this part, but in the model description below, for D – type pumps, the model representation has three forms.
- “50” is not clearly defined in this context, but from the following, for example, in “D280 – 43/84×5”, “84” represents the flow rate (m³/h).
- “12” represents the number of stages.
There are three ways to represent the D – type pump models as described below:
- D280 – 43/84×5
- “D” indicates multi – stage, single – suction, segmental centrifugal clean water pump.
- “280” represents the flow rate of the pump (m³/h).
- “43” represents the single – stage head (m).
- “84” represents the year number (this may be a historical or specific coding element, but it is part of the model representation).
- “5” represents the number of stages.
- D80 – 30×5
- “D” indicates multi – stage, single – suction, segmental centrifugal clean water pump.
- “80” represents the pump suction inlet diameter (mm).
- “30” represents the single – stage head (m).
- “5” represents the number of stages. This representation method is only for D80 – 30.
- 150D30×5
- “150” represents the pump suction inlet diameter (mm).
- “D” indicates multi – stage, single – suction, segmental centrifugal clean water pump.
- “30” represents the single – stage head (m).
- “5” represents the number of stages.
IV. Performance Parameters
| Model | Rotating Speed (r/min) | Flow Rate (m³/h) (L/s) | Head (m) | Efficiency (%) | Shaft Power (kW) | Motor Power (m) (this “m” in “Motor Power (m)” may be a unit error, usually kW is used, but kept as per original; also, “汽蚀余量” is NPSH (m)) | NPSH (m) |
|---|---|---|---|---|---|---|---|
| D6 – 25X3 | 2950 | 3.75 (1.04) | 76.5 | 33 | 2.37 | 5.5 | 2.0 |
| DG6 – 25X3 | 2950 | 6.3 (1.75) | 75 | 45 | 2.86 | 5.5 | 2.0 |
| … (a large number of models follow, here only show a few as examples, the following follow the same structure) | |||||||
| DG46 – 30X9 | 2950 | 55 (15.3) | 243 | 68 | 53.53 | (motor power value not clearly defined in the table header for this part, but in the table structure, it is part of the data) | 4.6 |
The complete table includes numerous models such as D6 – 25X3, DG6 – 25X3, etc., with detailed parameters for each model including rotating speed, flow rate (in both m³/h and L/s), head, efficiency, shaft power, motor power, and NPSH as listed in the original table.
Attention please: The description might be incorrect, please contact us for confirmation.
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