1. Product introduction
Type D horizontal multistage centrifugal pump (horizontal multistage pump) is suitable for conveying clean water (impurity content less than 1%, particle size less than 0.1mm) and other liquids with physical and chemical properties similar to clean water.
The temperature of the medium conveyed by the DG type medium and low pressure boiler feed pump is not more than 105 ℃, which is suitable for small boiler feed water or conveying similar hot water.
The temperature of medium conveyed by DG type sub high pressure boiler feed pump is not more than 160 ℃, which is suitable for small boiler feed water or conveying similar hot water.
2. Product pictures
3. Scope of application
D. DG type horizontal multi-stage pump is applicable to industrial and urban water supply and drainage, pressurization water supply for high-rise buildings, garden sprinkler irrigation, fire pressurization, long-distance water supply, heating, bathroom and other cold and warm water cycle pressurization and equipment supporting, especially for small boiler water supply.
4. Product Features
1. Advanced hydraulic model, high efficiency and wide performance range.
2. The pump runs stably with low noise.
3. The shaft seal adopts soft packing seal or mechanical seal, which is safe and reliable, simple in structure, and convenient and quick in maintenance.
4. The shaft is fully sealed to ensure no contact with medium, no rust and long service life.
5. Model Meaning
6. Specifications
D. Technical parameters of DG type horizontal multistage pump:
Flow: 6.3-300m3/h;
Lift: 13-650m;
Power: 2.2-400KW;
Rotating speed: 1450-2950r/min;
Caliber: φ 50- φ 200；
Temperature range: ≤ 160 ℃;
Working pressure: ≤ 3.0Mpa.
7. Installation method
(1) The unit of horizontal multi-stage pump must have a concrete foundation with sufficient strength and size, and the quality of the foundation is about 3-5 times of the unit quality. The foundation of the pump is 50-70mm longer than the base of the pump, and anchor holes (3-4 times the diameter of steel pipes for anchor bolts) should be reserved.
(2) When installing the pipeline, it shall be noted that the inlet and outlet pipelines of the pump shall be equipped with corresponding supports.
(3) The specification and length of the pipeline used shall be suitable and have sufficient pressure bearing capacity to minimize the turning and accessories of the pipeline.
(4) Check whether the rotating parts of the pump are stuck or collided. If the pump is collided during transportation, check whether the coupling is concentric and adjust it.
(5) Sufficient maintenance space shall be reserved for the pump during installation to facilitate equipment maintenance in the later period.
8. Precautions
(1) The horizontal multistage pump can only operate within the specified parameter range
(2) Turn on the power supply, click the start switch first to see whether the running direction of the motor is consistent with the rotation direction of the pump. If not, correct it immediately, and do not reverse it.
(3) The pump cannot be operated by closing the suction valve, otherwise the pump will run dry and the pump parts will be damaged.
(4) Observe the indication of pressure gauge and switch for adjustment during startup.
9. Frequently Asked Questions
(1) The water pump does not absorb water. It may be that the water injected into the pump is not enough,
(2) Insufficient flow of water pump may be due to blockage of water pump, excessive friction of sealing ring and insufficient rotation speed
(3) Excessive pump power may be used beyond the rated flow.
(4) Noise and vibration may be caused by unstable pipeline support, gas mixed with liquid, bearing damage, etc.
10. Use needs
(1) Regularly check the pump performance (such as flow, lift, vibration, etc.) and make records. The maintenance items and the interval time between each maintenance depend on the working conditions and operating conditions of the pump.
(2) After the pump is started, do not close the discharge valve or close it for a long time, otherwise the liquid in the pump will overheat.
(3) When the pump stops, close the discharge valve of the pump to the minimum flow, but never close the suction valve of the pump.
(4) The medium conveyed by the pump shall not contain air or gas, otherwise, the flow and lift of the pump will not be measured accurately, and the parts will be damaged by grinding.
(5) The suction pipe of the pump shall be as short as possible, the pipe diameter shall be greater than or equal to the diameter of the suction inlet of the pump, and the bending radius of the suction pipe of the pump shall be as large as possible.
D-Type Horizontal Multistage Centrifugal Pump: Performance, Maintenance, Applications, and Safety Guidelines
The D-type horizontal multistage centrifugal pump is a highly efficient, high-pressure fluid handling solution widely applied in industrial, agricultural, and municipal sectors. With its horizontal sectional design and multistage impellers, it provides consistent pressure, stable performance, and long service life. This article introduces its performance features, maintenance methods, usage precautions, and applications, offering a complete guide for engineers, operators, and procurement managers.
The D-type pump is a horizontal, sectional, multistage centrifugal pump designed to transport clear water or liquids with similar physical and chemical properties. Each stage of the impeller increases the fluid pressure, making the pump ideal for applications requiring high head and steady flow.
Key Characteristics:
Horizontal structure for stable operation and easy installation
Multistage impellers provide high pressure and large flow capacity
Modular design simplifies maintenance and spare parts replacement
Long service life with durable wear-resistant materials
Wide application range from industrial circulation to municipal supply
The D-type horizontal multistage centrifugal pump is known for reliability and energy efficiency.
High Efficiency: Multiple impellers deliver strong pressure with reduced energy consumption.
Stable Operation: Horizontal sectional design ensures smooth flow and minimal vibration.
Wide Flow and Head Range: Suitable for both low-flow high-head and large-flow medium-head operations.
Durability: Key parts such as impellers, shaft, and seals are manufactured from corrosion-resistant and wear-resistant materials.
Energy-Saving Design: Optimized hydraulic performance reduces operating costs.
Adaptability: Can be customized with different materials for handling hot water, oil, or corrosive liquids.
| Parameter | Range |
|---|---|
| Flow Rate | 6.3 – 450 m3/h |
| Head | 50 – 650 m |
| Working Pressure | ≤ 3.0 MPa |
| Temperature Range | 0°C – 80°C (standard), up to 105°C with special design |
| Pump Speed | 1450 or 2900 rpm |
Proper operation is essential for maximizing the performance and service life of the D-type pump.
Install the pump on a solid foundation to avoid vibration.
Ensure correct alignment between pump and motor before operation.
Install a filter or strainer at the pump inlet to prevent debris from entering.
Provide sufficient clearance around the pump for maintenance activities.
Do not operate the pump without water to prevent seal and bearing damage.
Gradually open and close valves to avoid water hammer or pressure surges.
Ensure the pump operates within its rated flow and head range to prevent cavitation.
Continuously monitor temperature, vibration, and noise for abnormal signs.
Always disconnect power supply before performing maintenance.
Use appropriate protective gear when handling high-temperature or high-pressure fluids.
Avoid mixing chemicals or corrosive liquids unless the pump is specifically designed for such media.
Replace worn seals and gaskets with genuine spare parts to maintain performance and safety.
Regular maintenance reduces downtime and extends the pump’s service life.
| Maintenance Task | Frequency | Purpose |
|---|---|---|
| Visual inspection (check leaks, vibration, noise) | Weekly | Detect early issues |
| Alignment check between pump and motor | Monthly | Prevent excessive wear |
| Lubricate bearings | Every 3–6 months | Reduce friction and extend life |
| Inspect seals and gaskets | Every 3–6 months | Prevent leakage |
| Replace worn impellers and shaft sleeves | Annually | Maintain hydraulic efficiency |
| Electrical system check | Annually | Ensure safe motor operation |
| Performance testing | Annually | Verify efficiency and pressure stability |
Keep a detailed maintenance logbook for all inspection and repair activities.
Use clean lubricants and replace them regularly.
Flush the pump with clean water after handling muddy or corrosive fluids.
Stock essential spare parts (seals, gaskets, bearings) for quick replacement.
Thanks to its high efficiency and strong pressure capabilities, the D-type horizontal multistage centrifugal pump is widely applied across industries:
Boiler Feed Systems: Reliable supply of high-pressure hot water.
Cooling Circulation: Stable operation in factories, power plants, and refineries.
Process Water Supply: Used in steel mills, paper plants, and textile industries.
Urban Water Supply: Provides stable pressure for high-rise buildings and municipal networks.
Firefighting Systems: Delivers strong, continuous water pressure for firefighting pipelines.
Water Treatment Plants: Used for transporting clean water in purification processes.
Mine Drainage: Removes underground water with high efficiency.
Agricultural Irrigation: Provides strong water delivery over long distances and varying elevations.
The D-type horizontal multistage centrifugal pump is a robust, high-pressure, and energy-efficient pumping solution suitable for diverse applications. With its modular design, stable operation, and reliable performance, it has become an essential choice for industries ranging from municipal engineering to mining operations.
By following the correct usage precautions, adhering to recommended maintenance practices, and understanding its performance features, users can ensure long service life, reduced downtime, and lower operating costs. Whether in industrial plants, municipal systems, or agricultural projects, the D-type pump provides consistent and cost-effective water transportation.
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whatsapp：+86 15868545868/+8618968868555/+8618815171262
Email：haiwan@haiwanpump.cn
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