| Quantity: | |
|---|---|
| PDF Export | |
DG-type Multi-stage Centrifugal Pump is an efficient and energy-saving multi-stage segmented centrifugal pump, mainly used for conveying clean water or liquids with physical and chemical properties similar to water. It is widely used in boiler feedwater, factory water supply, urban water supply, mine drainage, and high-pressure water systems. This series of pumps has the characteristics of high pressure, high efficiency, stable operation, and compact structure, which can meet various high head conveying needs.
1.Structural Feature
The DG-type horizontal multi-stage centrifugal pump adopts a segmented structure, mainly composed of pump body, impeller, guide vanes, shaft, shaft sleeve, balancing device, packing seal or mechanical seal and other components.
1.1 Pump body
The pump body consists of a suction section, a middle section, and a discharge section, which are connected by tightening bolts. The suction section and the discharge section are respectively equipped with inlet and outlet flanges, and the outlet flange can be adjusted in direction according to user needs.
1.2 Impeller
The impeller is made of high-quality alloy material and undergoes dynamic balance correction to ensure the stable operation of the pump. The blades of each stage of the impeller have been optimized to improve hydraulic performance and pump efficiency.
1.3 Guide vanes
The guide vanes play a role in guiding liquid flow and reducing hydraulic losses, enabling multi-stage centrifugal pumps to efficiently transfer energy step by step and improve overall pump performance.
1.4 Shaft and bearings
The pump shaft is made of high-strength alloy steel and equipped with rolling bearings or sliding bearings to ensure good lubrication and operational stability of the bearings.
1.5 Balance device
Due to the significant axial force generated during the operation of multi-stage pumps, DG type pumps are usually equipped with balance disks or balance drums to counteract axial thrust, ensure extended bearing life, and improve operational reliability.
1.6 Sealing device
DG type horizontal multi-stage centrifugal pump can use packing seal or mechanical seal. The packing seal adopts flexible graphite or PTFE packing, suitable for general working conditions; Mechanical seals are suitable for applications that require higher sealing performance, such as high temperature, high pressure, or corrosive media.
2.Performance Parameter
Flow range: 3.75 to 500m³/h
Head range: 50-1050m
Rotational speed: 1450r/min, 2950r/min
Medium temperature: ≤ 160 ℃ (high temperature type can reach 210 ℃)
Work pressure: ≤ 10MPa
Efficiency: 70% to 85%
3. Working Principle
The working principle of DG type horizontal multi-stage centrifugal pump is based on the action of centrifugal force. The following is its detailed working principle:
Motor drive: The impeller of the motor driven pump rotates at high speed.
Liquid enters the impeller: The liquid enters the first stage impeller through the suction port of the pump. The rotation of the impeller allows the liquid to gain kinetic energy and generate centrifugal force.
Liquid acceleration and pressurization: Under the action of the impeller, the liquid is thrown around the impeller along the flow channel between the blades, increasing both speed and pressure.
Liquid passes through the guide wheel: The liquid thrown out of the impeller enters the guide wheel, and the role of the guide wheel is to convert some of the kinetic energy of the liquid into static pressure energy, thereby further increasing the pressure of the liquid.
Multi stage pressurization: After passing through the first stage impeller and guide wheel, the liquid enters the next stage impeller and repeats the above process. Each stage of impeller and guide wheel further increases the pressure of the liquid .
Final discharge: After being pressurized by multi-stage impellers and guide wheels, the liquid is finally discharged through the pump's discharge port to achieve the required pressure and flow rate.
Axial force balance: The axial force of the pump is balanced by a balance plate to ensure stable operation of the pump.
Shaft seal: The shaft seal of the pump generally adopts packing seal, and mechanical seal can also be used according to user needs.
DG type horizontal multi-stage centrifugal pump can effectively transport liquids and provide high head and high flow output. This type of pump is widely used in industrial and municipal fields, suitable for transporting clean water or other liquids with physical and chemical properties similar to water.
4. Product Features
The characteristics of DG type horizontal multi-stage centrifugal pump mainly include the following aspects:
Efficiency: DG type pumps have the characteristic of high efficiency, which can provide stable flow and pressure at low energy consumption.
Wide performance range: This pump has a wide performance range, suitable for various working conditions, and can meet different flow and head requirements.
Safe and stable: DG type pumps operate safely and stably, and can work continuously for a long time without any malfunctions.
Low noise: This pump has low noise during operation and is suitable for use in situations that require a quiet environment.
Long lifespan: The design and material selection of DG type pumps give them a longer service life, reducing the frequency of maintenance and replacement.
Easy installation and maintenance: The structural design of this pump makes the installation and maintenance process relatively simple, reducing maintenance costs and downtime.
Applicable medium: DG type pumps are suitable for transporting clean water or other liquids with physical and chemical properties similar to water, including liquids containing small amounts of solid particles.
Temperature range: This pump can handle a wide range of liquid temperatures, typically suitable for liquid temperatures between -20 ° C and 105 ° C.
Shaft seal design: The shaft seal of DG type pump can use soft packing seal or mechanical seal to ensure safe and reliable sealing.
5.Application Scope:
The application range of DG type horizontal multi-stage centrifugal pump is very wide, mainly including the following aspects:
Industrial boiler feedwater: DG type pumps are suitable for the feedwater system of industrial boilers, providing stable high-pressure water flow to ensure the normal operation of the boiler.
Water treatment: DG type pumps are commonly used in various water treatment applications to transport clean water or liquids with physical and chemical properties similar to water, including reverse osmosis systems and wastewater treatment.
Municipal water supply and drainage: DG type pumps are suitable for water supply and drainage systems in municipal engineering, which can efficiently transport water flow and meet the needs of urban water supply and drainage.
Air conditioning system: In the air conditioning system, DG type pumps are used to transport circulating water, ensuring the normal operation of the air conditioning system.
Agricultural irrigation: DG type pumps are also suitable for agricultural irrigation systems, providing stable water flow to meet the needs of farmland irrigation.
Petroleum and chemical industry: In the petroleum and chemical industry, DG type pumps are used to transport various liquids, including oils, chemicals, and other industrial liquids.
Fire protection system: DG type pumps are also used in fire protection systems, which can provide high-pressure water flow for fire extinguishing and water supply to firefighting equipment.
Mining: In mining, DG type pumps are used for applications such as mine drainage and slurry transportation.
Energy and power industry: DG type pumps are used in various high-pressure water transportation applications in the energy and power industry, including cooling water systems and boiler feedwater.
Architecture and Construction: In the field of architecture and construction, DG type pumps are used for the construction of water supply systems, drainage systems, and fire protection systems.
These application ranges demonstrate the wide applicability and importance of DG type horizontal multi-stage centrifugal pumps in various industrial and municipal fields.
6.INSTALLATION REQUIREMENTS：
The installation requirements for DG type horizontal multi-stage centrifugal pump are as follows:
Basic plane leveling:
The foundation plane for installing the pump should be leveled horizontally. After the basic cement solidifies, the base and anchor bolt holes should be checked for looseness.
Concentricity between motor and pump:
After the assembly of the motor, pump, and base, the concentricity of the pump shaft and motor shaft should be strictly checked to ensure that the two axis centerlines are on the same horizontal line.
Coupling end shaft clearance:
When installing the motor and water pump in combination, the axial end of the pump coupling should be pulled out and a gap of 2-3 mm should be left on the end face to ensure the normal operation of the pump and motor.
Pump channel inspection:
Before installing the pump, carefully check whether there are any hard objects (such as stones, iron sand, etc.) in the pump flow channel to prevent them from affecting the normal operation of the pump.
Installation tools and lifting equipment:
Prepare installation tools and lifting equipment to ensure a smooth installation process.
Pipeline connection:
The suction and discharge pipes of the pump should have their own supports, and the pump body itself is not allowed to bear the load of the pipes.
Trial operation:
The pump is prohibited from high-speed no-load trial operation before operation, and should be tested with liquid according to the requirements of the operating manual.
Electrical safety:
Only authorized personnel are allowed to install, maintain, and inspect pumps, repair electrical components, and comply with local safety regulations.
These installation requirements ensure that the DG type horizontal multi-stage centrifugal pump can operate safely and stably, and extend its service life.
Shanghai Jiushi Pump Industry is a professional enterprise engaged in the research and development, production, and sales of pump equipment. Its products cover multiple categories such as centrifugal pumps, multi-stage pumps, sewage pumps, water pumps, rotary pumps, self-priming pumps, pipeline pumps, magnetic pumps, and chemical pumps, and are widely used in industries such as power, petrochemicals, environmental protection, and water supply. The company is committed to providing efficient and energy-saving pump products, and winning market recognition with high-quality after-sales service.
DG-type Multi-stage Centrifugal Pump is an efficient and energy-saving multi-stage segmented centrifugal pump, mainly used for conveying clean water or liquids with physical and chemical properties similar to water. It is widely used in boiler feedwater, factory water supply, urban water supply, mine drainage, and high-pressure water systems. This series of pumps has the characteristics of high pressure, high efficiency, stable operation, and compact structure, which can meet various high head conveying needs.
1.Structural Feature
The DG-type horizontal multi-stage centrifugal pump adopts a segmented structure, mainly composed of pump body, impeller, guide vanes, shaft, shaft sleeve, balancing device, packing seal or mechanical seal and other components.
1.1 Pump body
The pump body consists of a suction section, a middle section, and a discharge section, which are connected by tightening bolts. The suction section and the discharge section are respectively equipped with inlet and outlet flanges, and the outlet flange can be adjusted in direction according to user needs.
1.2 Impeller
The impeller is made of high-quality alloy material and undergoes dynamic balance correction to ensure the stable operation of the pump. The blades of each stage of the impeller have been optimized to improve hydraulic performance and pump efficiency.
1.3 Guide vanes
The guide vanes play a role in guiding liquid flow and reducing hydraulic losses, enabling multi-stage centrifugal pumps to efficiently transfer energy step by step and improve overall pump performance.
1.4 Shaft and bearings
The pump shaft is made of high-strength alloy steel and equipped with rolling bearings or sliding bearings to ensure good lubrication and operational stability of the bearings.
1.5 Balance device
Due to the significant axial force generated during the operation of multi-stage pumps, DG type pumps are usually equipped with balance disks or balance drums to counteract axial thrust, ensure extended bearing life, and improve operational reliability.
1.6 Sealing device
DG type horizontal multi-stage centrifugal pump can use packing seal or mechanical seal. The packing seal adopts flexible graphite or PTFE packing, suitable for general working conditions; Mechanical seals are suitable for applications that require higher sealing performance, such as high temperature, high pressure, or corrosive media.
2.Performance Parameter
Flow range: 3.75 to 500m³/h
Head range: 50-1050m
Rotational speed: 1450r/min, 2950r/min
Medium temperature: ≤ 160 ℃ (high temperature type can reach 210 ℃)
Work pressure: ≤ 10MPa
Efficiency: 70% to 85%
3. Working Principle
The working principle of DG type horizontal multi-stage centrifugal pump is based on the action of centrifugal force. The following is its detailed working principle:
Motor drive: The impeller of the motor driven pump rotates at high speed.
Liquid enters the impeller: The liquid enters the first stage impeller through the suction port of the pump. The rotation of the impeller allows the liquid to gain kinetic energy and generate centrifugal force.
Liquid acceleration and pressurization: Under the action of the impeller, the liquid is thrown around the impeller along the flow channel between the blades, increasing both speed and pressure.
Liquid passes through the guide wheel: The liquid thrown out of the impeller enters the guide wheel, and the role of the guide wheel is to convert some of the kinetic energy of the liquid into static pressure energy, thereby further increasing the pressure of the liquid.
Multi stage pressurization: After passing through the first stage impeller and guide wheel, the liquid enters the next stage impeller and repeats the above process. Each stage of impeller and guide wheel further increases the pressure of the liquid .
Final discharge: After being pressurized by multi-stage impellers and guide wheels, the liquid is finally discharged through the pump's discharge port to achieve the required pressure and flow rate.
Axial force balance: The axial force of the pump is balanced by a balance plate to ensure stable operation of the pump.
Shaft seal: The shaft seal of the pump generally adopts packing seal, and mechanical seal can also be used according to user needs.
DG type horizontal multi-stage centrifugal pump can effectively transport liquids and provide high head and high flow output. This type of pump is widely used in industrial and municipal fields, suitable for transporting clean water or other liquids with physical and chemical properties similar to water.
4. Product Features
The characteristics of DG type horizontal multi-stage centrifugal pump mainly include the following aspects:
Efficiency: DG type pumps have the characteristic of high efficiency, which can provide stable flow and pressure at low energy consumption.
Wide performance range: This pump has a wide performance range, suitable for various working conditions, and can meet different flow and head requirements.
Safe and stable: DG type pumps operate safely and stably, and can work continuously for a long time without any malfunctions.
Low noise: This pump has low noise during operation and is suitable for use in situations that require a quiet environment.
Long lifespan: The design and material selection of DG type pumps give them a longer service life, reducing the frequency of maintenance and replacement.
Easy installation and maintenance: The structural design of this pump makes the installation and maintenance process relatively simple, reducing maintenance costs and downtime.
Applicable medium: DG type pumps are suitable for transporting clean water or other liquids with physical and chemical properties similar to water, including liquids containing small amounts of solid particles.
Temperature range: This pump can handle a wide range of liquid temperatures, typically suitable for liquid temperatures between -20 ° C and 105 ° C.
Shaft seal design: The shaft seal of DG type pump can use soft packing seal or mechanical seal to ensure safe and reliable sealing.
5.Application Scope:
The application range of DG type horizontal multi-stage centrifugal pump is very wide, mainly including the following aspects:
Industrial boiler feedwater: DG type pumps are suitable for the feedwater system of industrial boilers, providing stable high-pressure water flow to ensure the normal operation of the boiler.
Water treatment: DG type pumps are commonly used in various water treatment applications to transport clean water or liquids with physical and chemical properties similar to water, including reverse osmosis systems and wastewater treatment.
Municipal water supply and drainage: DG type pumps are suitable for water supply and drainage systems in municipal engineering, which can efficiently transport water flow and meet the needs of urban water supply and drainage.
Air conditioning system: In the air conditioning system, DG type pumps are used to transport circulating water, ensuring the normal operation of the air conditioning system.
Agricultural irrigation: DG type pumps are also suitable for agricultural irrigation systems, providing stable water flow to meet the needs of farmland irrigation.
Petroleum and chemical industry: In the petroleum and chemical industry, DG type pumps are used to transport various liquids, including oils, chemicals, and other industrial liquids.
Fire protection system: DG type pumps are also used in fire protection systems, which can provide high-pressure water flow for fire extinguishing and water supply to firefighting equipment.
Mining: In mining, DG type pumps are used for applications such as mine drainage and slurry transportation.
Energy and power industry: DG type pumps are used in various high-pressure water transportation applications in the energy and power industry, including cooling water systems and boiler feedwater.
Architecture and Construction: In the field of architecture and construction, DG type pumps are used for the construction of water supply systems, drainage systems, and fire protection systems.
These application ranges demonstrate the wide applicability and importance of DG type horizontal multi-stage centrifugal pumps in various industrial and municipal fields.
6.INSTALLATION REQUIREMENTS：
The installation requirements for DG type horizontal multi-stage centrifugal pump are as follows:
Basic plane leveling:
The foundation plane for installing the pump should be leveled horizontally. After the basic cement solidifies, the base and anchor bolt holes should be checked for looseness.
Concentricity between motor and pump:
After the assembly of the motor, pump, and base, the concentricity of the pump shaft and motor shaft should be strictly checked to ensure that the two axis centerlines are on the same horizontal line.
Coupling end shaft clearance:
When installing the motor and water pump in combination, the axial end of the pump coupling should be pulled out and a gap of 2-3 mm should be left on the end face to ensure the normal operation of the pump and motor.
Pump channel inspection:
Before installing the pump, carefully check whether there are any hard objects (such as stones, iron sand, etc.) in the pump flow channel to prevent them from affecting the normal operation of the pump.
Installation tools and lifting equipment:
Prepare installation tools and lifting equipment to ensure a smooth installation process.
Pipeline connection:
The suction and discharge pipes of the pump should have their own supports, and the pump body itself is not allowed to bear the load of the pipes.
Trial operation:
The pump is prohibited from high-speed no-load trial operation before operation, and should be tested with liquid according to the requirements of the operating manual.
Electrical safety:
Only authorized personnel are allowed to install, maintain, and inspect pumps, repair electrical components, and comply with local safety regulations.
These installation requirements ensure that the DG type horizontal multi-stage centrifugal pump can operate safely and stably, and extend its service life.
Shanghai Jiushi Pump Industry is a professional enterprise engaged in the research and development, production, and sales of pump equipment. Its products cover multiple categories such as centrifugal pumps, multi-stage pumps, sewage pumps, water pumps, rotary pumps, self-priming pumps, pipeline pumps, magnetic pumps, and chemical pumps, and are widely used in industries such as power, petrochemicals, environmental protection, and water supply. The company is committed to providing efficient and energy-saving pump products, and winning market recognition with high-quality after-sales service.