For nearly 30 years, Dafu has been focusing on technical research, production manufacturing, and market promotion of various pumps and motors, committed to becoming a pioneer in changing traditional water flow. In order to implement the strategy of developing the enterprise through science and technology, we have implemented modern production and management modes of the industry, conducted equipment renovation and process improvement continuously to improve product quality and production efficiency, and promote the comprehensive quality management to establish and improve the quality management system gradually for stabilizing and improving product quality, so as to provide customers with high quality products and thorough service.
Why Choose Us
Professional R&D Team
We have an excellent technology research and development team and type test laboratory of the industry nationwide , also has set up the Shangrao Enterprise Technology Centre and applied for more than 30 patents, which provides a reliable guarantee for product technology and core competitiveness enhancement of the company.
Quality Assurance
The company has passed ISO9001 quality management system certification, as well as other related product certificates such as CE, GS, EMC, ROHS, etc.
Rich Experience
We have 36 years experience sine our establishment in 1988,we are professional in producing and selling water pumps.Meeting the requirements of the product design and process, providing strict testing data.
Production Equipment
We have equipped with the most advanced CNC processing equipment for casting, CNC precision automatic lathe for shaft, UAS patent automatic machine for casting aluminum in rotor, automatic winding machine and other kinds of processing equipment at home and abroad.Our technicians will do regular scheduled maintenance on these machines to guarantee them work well.
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![Stainless Steel Deep Well Pumps]()
Stainless Steel Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +50℃. Maximum sand content:read more -
![Cast Iron Deep Well Pumps]()
Cast Iron Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![Vertical Deep Well Jet Pump]()
Vertical Deep Well Jet PumpSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![Submersible Deep Well Water Pump Solar]()
Submersible Deep Well Water Pump SolarSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈4000rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![High Flow Submersible Well Pump]()
High Flow Submersible Well PumpSuitable fluids: Substances that are clear, solid or abrasive in nature closely resemble water in their chemical neutrality and other features.. Speed range: n≈2850rpm. Maximum fluid temperature upread more -
![Irrigation Deep Well Pumps]()
Irrigation Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![Vertical Deep Well Water Pumps]()
Vertical Deep Well Water PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![2.5' Deep Well Pumps]()
2.5' Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![3' Deep Well Pumps]()
3' Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![3.5' Deep Well Pumps]()
3.5' Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![4' Deep Well Pumps]()
4' Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more -
![5' Deep Well Pumps]()
5' Deep Well PumpsSuitable fluids: Clear, solid or abrasive substances, chemically neutral and close to the characteristics of water. Speed range: n≈2850rpm. Maximum fluid temperature up to +35℃. Maximum sand content:read more
Advantages of Submersible Pumps
Safe
All internal components of a submersible pump stay completely sealed from the water or other foreign elements. Hence, it is safer to use a submersible pump in comparison to other types of pumping devices. These devices are coated to prevent corrosion resulting from staying submerged.
Portable
Submersible pumps are lightweight pumping machines with a compact structure. Hence, it can be carried by one person to different places based upon a user's requirements or pumping requirements.
Priming
There is no need to prime a submersible pump since it functions below the level of the liquid that is being pumped out. Therefore, a submersible pump can be easily used and maintained.
Leak Proof
A submersible pump is fitted with watertight seals and gaskets. This type of sealed structure prevents the leakage of fluid from the submersible pump. The internal components of the pump remain completely sealed which eliminates any possibility of electrical accident.
Resistant to Corrosion
The materials used for the manufacturing of a submersible pump are capable of resisting corrosion. The hermetic sealing of the pump also prevents exposure to corrosive material or oxidation.
Noise Level
A submersible pump is not noisy when the motor is running since the pump remains submerged. Therefore, the sound is muffled to some extent by the water or any other liquid wherein the pump remains.
Components of Submersible Pumps
Motor: The motor is the primary component of a submersible pump and is responsible for driving the impeller. It is typically a sealed, waterproof unit specially designed to operate underwater.
Impeller: The impeller is a rotating component that consists of curved blades or vanes. Its main function is to create centrifugal force, which propels the fluid from the inlet to the outlet of the pump, generating the pumping action.
Diffuser: The diffuser is a stationary component that surrounds the impeller. Its purpose is to gradually convert the high-speed, low-pressure flow from the impeller into a high-pressure flow by increasing the flow area.
Casing: The casing, also known as the pump housing, is the outer shell of the pump that encloses the motor and impeller. It provides structural support and is typically made of durable materials such as stainless steel or cast iron to withstand the harsh conditions in which submersible pumps operate.
Shaft: The shaft connects the motor to the impeller and transfers the rotational motion from the motor to the impeller. It is usually made of stainless steel or another corrosion-resistant material to withstand exposure to fluids.
Power Cable: The power cable supplies electrical power from the surface to the submersible pump. It is specially designed to be waterproof and durable to withstand submersion. The cable is typically protected by a sheath to ensure electrical safety.
Strainer: The strainer is located at the inlet of the pump and serves to filter out large debris and solids from entering the pump. It typically consists of a mesh or perforated plate that prevents clogging and damage to the impeller.
Float Switch: Float switches are commonly used in submersible pumps for automatic operation. They activate or deactivate the pump based on the water level, ensuring proper water management, and preventing dry running.
Control Panel: For larger submersible pump installations, a control panel is used to monitor and control the pump's operation. It may include features such as motor protection, level sensors, timers, and alarms.
Materials Used in Submersible Pumps
Stainless Steel
Stainless steel is one of the most popular materials for submersible pump construction. It is highly resistant to corrosion and is suitable for various water-related applications, including potable water supply, well pumps, and wastewater handling. Stainless steel pumps are known for their durability and longevity.
Cast Iron
Cast iron is another common material used in submersible pump construction. It is known for its strength and durability. Cast iron submersible pumps are often used in sewage and wastewater applications due to their resistance to abrasion and wear.
Bronze
Bronze is used in submersible pumps, particularly in applications where the pump needs to handle seawater or brackish water. It is corrosion-resistant and can withstand the harsh conditions of marine environments.
Plastic or Thermoplastic
Some submersible pumps are constructed with thermoplastic materials, such as PVC or thermoplastic elastomers. These pumps are suitable for less demanding applications, such as small-scale residential water supply or sump pump systems. They are lightweight and cost-effective but may not be as durable as metal alternatives.
Boreholes / Water Wells
Submersible pumps are commonly used in deep wells to extract groundwater. Their ability to operate at significant depths and provide a steady flow of water makes them ideal for residential, agricultural, and industrial water supply.
Sewage Treatment
In sewage treatment plants, submersible pumps are employed to move wastewater and sludge. Their sealed design prevents contamination and ensures reliable operation in harsh conditions.
Oil Production
Submersible pumps are utilized in the oil and gas industry for extracting oil from deep wells. Their ability to handle high pressures and operate in challenging environments is crucial for efficient oil production.
Irrigation Systems
Agricultural irrigation systems benefit from submersible pumps due to their efficiency and ability to deliver water directly to the fields. This ensures optimal water usage and supports crop growth.
Flood Control / Dewatering
During floods, submersible pumps are deployed to remove water from basements, tunnels, and other flooded areas. Their portability and high efficiency make them indispensable for emergency flood management.
FAQ
We're professional submersible pumps manufacturers and suppliers in China, specialized in providing high quality customized service. We warmly welcome you to buy high-grade submersible pumps from our factory.