| Parameter | Specification |
| Product Name | DG Horizontal Multistage Boiler Feed Pump |
| Pump Type | Horizontal multistage centrifugal pump |
| Flow Rate | 5–850 m³/h |
| Head Range | 5–1200 m |
| Outlet Diameter | φ40–φ300 mm |
| Liquid Temperature | 0–150°C |
| Installation Type | Horizontal installation |
| Hydraulic Structure | Multistage centrifugal design |
| Pumped Medium | Clean water, boiler feed water and similar low-viscosity liquids |
| Main Applications | Small boiler feed systems and municipal water supply and drainage |
Specific motor power, number of stages, rotational speed, materials and sealing configuration depend on the selected model and operating conditions.
The DG pump uses multiple impeller stages to progressively increase the liquid pressure.
With a maximum head of up to 1200 meters, it is suitable for systems requiring high discharge pressure, substantial elevation lifting or long-distance pressurized water transportation.
Typical high-head applications include:
The pump can handle liquids with temperatures ranging from 0 to 150°C.
This temperature capability makes it suitable for boiler feed water, hot-water transportation and other thermal water systems.
For high-temperature operation, the pump materials, shaft seal, bearings and cooling arrangement should be selected according to the actual temperature and system pressure.
The hydraulic components are designed to reduce internal flow losses and improve energy conversion.
When the pump is correctly selected and operated near its recommended duty point, the high-efficiency hydraulic design can help:
For systems with changing demand, variable-frequency control may be used where appropriate to improve energy performance.
The horizontal arrangement provides stable installation and convenient connection to the motor and pipelines.
The multistage structure allows high pressure to be generated without requiring a single oversized impeller.
The pump can be installed on a common base with the motor and connected to the suction and discharge pipelines using standard fittings.
The horizontal configuration simplifies equipment positioning, shaft alignment and pump-room layout.
Once correctly installed, filled and commissioned, the pump provides stable continuous operation with straightforward operating procedures.
Pressure gauges, valves and protection equipment can be integrated into the system for convenient monitoring and control.
The sectional multistage construction allows the pump to be dismantled for inspection and maintenance.
Internal components such as impellers, guide vanes, shaft sleeves, bearings and seals can be checked or replaced according to the maintenance schedule.
Flow capacities from 5 to 850 m³/h and heads from 5 to 1200 meters allow the DG series to cover a broad range of small, medium and large high-pressure water systems.
The rigid horizontal structure and balanced rotor arrangement support reliable continuous-duty operation when the pump is properly aligned, lubricated and maintained.
The DG Horizontal Multistage Boiler Feed Pump is primarily designed for feeding water into small and medium boiler systems.
The pump raises the feed-water pressure so that water can enter the boiler against the internal operating pressure.
Typical applications include:
The selected pump discharge pressure must be higher than the boiler operating pressure while also overcoming pipeline resistance and elevation differences.
The pump can be used for high-pressure water delivery in municipal pumping stations and distribution networks.
Typical uses include:
For suitable clean or lightly contaminated water, the pump may be used in municipal drainage and water-transfer projects requiring medium or high pressure.
The liquid should not contain large particles, long fibers or highly abrasive solids.
The high-head capability makes the pump suitable for water-supply systems serving high-rise buildings or elevated facilities.
It can be integrated into booster systems to maintain adequate water pressure at upper floors.
The DG pump can provide pressurized clean water for industrial production and utility systems.
Applications may include:
The pump is suitable for transporting water through long pipelines where significant friction losses must be overcome.
Pipeline length, diameter, elevation and fitting losses should be included when calculating the required total head.
With a maximum liquid temperature of 150°C, the pump can be selected for compatible hot-water applications.
The system should be designed to maintain sufficient inlet pressure and prevent vaporization or cavitation at elevated temperatures.
The DG Horizontal Multistage Boiler Feed Pump is mainly suitable for transporting:
The pumped medium should generally be free from:
Water quality should be controlled in boiler systems to reduce scaling, corrosion and deposits inside the pump.
The DG pump contains several impellers installed along a common shaft.
Water enters the first-stage impeller, where it gains velocity and pressure. It then passes through a guide vane or return channel into the next stage.
Each successive stage adds pressure to the water until it reaches the final discharge outlet.
This multistage process provides:
The number of stages is selected according to the required flow and total discharge head.
Boiler feed-water systems require stable pressure and reliable continuous operation.
The DG pump provides several advantages for these applications:
The feed-water pressure should always be selected with an adequate margin above the boiler operating pressure.
As liquid temperature increases, the possibility of vaporization and cavitation also increases.
For hot-water and boiler-feed applications, the following factors should be considered:
A feed tank or deaerator should provide sufficient pressure at the pump inlet to support stable operation.
The pump should not be operated under conditions where the inlet pressure is insufficient for the water temperature.
The pump should be selected so that its normal duty point is close to the recommended high-efficiency operating range.
Operating too far from the design point may increase:
Variable-frequency control may be considered when the required flow changes significantly during operation.
However, minimum rotational-speed, pressure and boiler-supply requirements must be considered before using frequency control.
The pump should be installed horizontally on a firm and level foundation.
The pump and motor shafts must be accurately aligned before startup. Poor alignment may cause vibration, bearing wear, seal leakage and coupling damage.
The suction pipeline should be as short and direct as possible.
Pipe diameter should be selected to maintain suitable inlet velocity and reduce suction losses.
The suction and discharge pipelines must be independently supported so that their weight and thermal expansion forces are not transferred to the pump casing.
For hot-water applications, pipeline thermal expansion should be considered during system design.
Valves and pressure gauges should be installed on the inlet and outlet sides as required.
Before startup, the pump casing and suction pipeline must be completely filled with liquid and properly vented.
Dry running must be avoided.
Before starting the pump:
1.Confirm that the pump and motor are correctly aligned;
2.Check bearing lubrication;
3.Confirm that all fasteners are secure;
4.Fill the pump and suction line with liquid;
5.Remove trapped air from the pump casing;
6.Open the suction valve fully;
7.Set the discharge valve according to the startup procedure;
8.Check the motor rotation direction;
9.Start the motor;
10.Gradually adjust the discharge valve;
11.Confirm stable pressure and flow;
12.Check for abnormal vibration, noise or leakage.
The operating current should remain within the motor rating.
Regular inspection is essential for reliable long-term operation.
Recommended checks include:
Water-quality control is especially important in boiler-feed systems because scale and deposits can reduce pump efficiency and restrict internal flow passages.
The DG Horizontal Multistage Boiler Feed Pump combines high-head performance, high-temperature capability and energy-efficient operation.
Its multistage structure provides heads of up to 1200 meters, making it suitable for boiler feed water, high-pressure municipal supply and long-distance water transportation.
The pump can handle liquids at temperatures up to 150°C when equipped with the appropriate materials and sealing configuration.
Its horizontal sectional structure is convenient to install, operate, dismantle and maintain, helping reduce service difficulty and equipment downtime.
With flow capacities from 5 to 850 m³/h and outlet sizes from φ40 to φ300 mm, the DG series provides a flexible and reliable pumping solution for small boiler systems and municipal water projects.
Please send us your required flow rate, head, boiler pressure, water temperature, inlet conditions, pipeline information, power supply and installation requirements.
Our technical team will recommend a suitable DG Horizontal Multistage Boiler Feed Pump and provide detailed performance data, motor configuration, materials, installation dimensions and quotation.
DG Horizontal Multistage Boiler Feed Pump — A high-head, high-temperature and energy-efficient solution for boiler feed water and municipal water systems.
