CHVAC (Shanghai) Machinery Co., Ltd., established in 1999, specializes in the trade of large, new, and pre-owned refrigeration units and HVAC solutions. The company’s extensive product range includes:
New and ex-stock centrifugal chilled water air conditioning units
Screw chilled water and heat pump ice-making units
Air-cooled screw cooling and heating units
Air-cooled vortex cooling and heating units
Air-cooled piston cooling and heating units
Centrifugal screw compressors
Host machine accessories
Why Choose Us?
Affordable parts
We provide parts at the lowest prices, making it economical to maintain your product and keep it running efficiently.
24/7 service centers
Our service centers operate around the clock, offering support whenever you need it, including evenings and weekends.
Rich experience
The company has long market experience and stable technical skills. The team understands project needs and offers clear solutions. Customers receive reliable support in every step.
Integrated business system
The company covers chiller sales, parts supply, and maintenance service. It manages multiple CHVAC brand companies in China and overseas. Customers get full support from one service platform.

Types of Oil Pump Impeller:
Closed impellers: Closed impellers are known for relative higher efficiency and the closed design ensures a streamlined flow, minimizing the risk of clogs and improving overall pump performance.
Open impellers: Open impellers offer easy pump maintenance and are well-suited for applications with varying viscosities. Their design allows for simple adjustments back to design clearances and the ability to handle fluids with higher solid content without compromising efficiency.
Semi-open impellers: Combining the benefits of closed and open designs, semi-open impellers strike a balance. They provide improved efficiency and solid handling capabilities while maintaining the flexibility and ease of maintenance associated with open impellers.
Vortex impellers:
Vortex impellers are designed to handle slurries and fluids with high solid content. Their unique design creates a vortex flow, preventing clogs and ensuring reliable performance in challenging applications like wastewater treatment.
Screw impellers:
Screw impellers are designed with a helical structure, providing a gentle and continuous flow. They effectively handle shear-sensitive materials and are often used in applications requiring precise fluid movement.
Cutter impellers:
Cutter impellers are specifically engineered for applications involving cutting or chopping solids. With sharp edges or blades, these impellers effectively macerate solid particles, making them suitable for wastewater treatment and other processes with challenging debris.bottom of form
Low flow impellers:
Combined with a circular casing, low flow impellers utilize straight vanes providing stable hydraulics at low flows with reduced radial bearing loads, vibration and impeller vane stress.
Applications of Oil Pump Impeller:
Pumps: In centrifugal, axial, and mixed-flow pumps, impellers are used to increase fluid pressure and flow rate for water supply, irrigation, industrial processes, and sewage treatment.
Compressors: Impellers compress gases in air conditioning systems, refrigeration units, and industrial gas compression.
Turbines: Hydro turbines and gas turbines use impellers to convert fluid energy into mechanical energy for power generation.
Mixers: Impellers are used in chemical reactors, food processing, and pharmaceutical manufacturing to mix liquids, suspend solids, and disperse gases.
Agitation: In bioreactors and fermentation processes, impellers provide the necessary agitation for cell growth and nutrient distribution.
Ventilation: Fans with axial impellers are used for ventilation and cooling buildings, vehicles, and electronic equipment.
Aeration: Wastewater treatment plants use impellers to aerate wastewater, promoting the growth of microorganisms that break down pollutants.
Mining: Slurry pumps use robust impellers to transport abrasive mixtures of solids and liquids.
HVAC systems: Impellers drive the fans in heating, ventilation, and air conditioning systems, ensuring air circulation and temperature control.
Dredging: Specialized impellers are used in dredging operations to pump sediment and debris from waterways.
Functions of an Impeller:
Fluid acceleration:
Impellers impart kinetic energy to the fluid, increasing its velocity as it flows radially outwards.
Pressure generation:
As the fluid accelerates, it creates pressure, which is used to overcome the resistance of the pipeline and drive the fluid forward.
Flow direction:
The impeller's shape and design guide the fluid flow, ensuring efficient and controlled movement.
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FAQ
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