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Shielded pump selection
Shielded pumps are a specialized type of centrifugal pump, designed with an integrated motor and impeller system. Unlike traditional centrifugal pumps that use a coupling to connect the motor shaft to the impeller shaft, shielded pumps have the impeller directly attached to the motor rotor. This configuration allows both the impeller and motor to rotate together within the same housing, eliminating the need for a mechanical seal. The stator and rotor are enclosed in a shielding sleeve made from high-strength, corrosion-resistant, non-magnetic stainless steel, ensuring protection from the pumped medium.
A small annular gap of approximately 0.7 mm exists between the stator and rotor. During operation, a portion of the liquid being pumped circulates through this gap, providing cooling to the motor and maintaining its efficiency. This design results in a compact structure, reduced vibration, lower noise levels, and improved energy efficiency. Additionally, since there is no dynamic seal, the risk of leakage is completely eliminated, making shielded pumps ideal for handling hazardous or corrosive fluids.
The LHP vertical shielded pump, developed by Zhejiang Yongjia Blue Sea Pump Co., Ltd., is specifically designed for applications requiring high reliability and safety. It is widely used in industries such as petrochemicals, metallurgy, chemical processing, and HVAC systems. The pump is suitable for transporting water and liquids with similar physical and chemical properties, including hot water, non-corrosive liquids, and even highly sensitive media.
Key features of the LHP series include:
- **No Shaft Seal**: Eliminates wear and leakage issues.
- **Cooling System**: Ensures long-lasting performance through continuous lubrication and cooling.
- **Advanced Hydraulic Design**: Precision-cast impellers with rigorous dynamic balancing for high efficiency and stable operation.
- **Wide Range of Specifications**: Available in 67 models and 184 specifications, with flow rates ranging from 5.5 to 1200 m³/h, head up to 125 meters, and power ratings from 0.55 kW to 160 kW.
Applications of the LHP series include:
1. **General Water Circulation**: Suitable for industrial and urban water supply, fire pressurization, HVAC systems, and building water circulation.
2. **Hot Water Systems**: Ideal for heating and cooling systems where temperatures do not exceed 160°C.
3. **Corrosion-Resistant Use**: Designed for non-corrosive, low-viscosity liquids in chemical, food, and pharmaceutical industries.
Working conditions require the medium to be soft, non-flammable, and free of solid particles or fibers. The ambient temperature should not exceed 40°C, and humidity must remain below 95%. For special applications, it's recommended to consult the manufacturer.
With its advanced technology and reliable performance, the LHP shielded pump is a preferred choice in modern industrial and commercial settings. Its integration of safety, efficiency, and durability makes it a valuable asset in various critical applications.