Product name: stainless steel investment casting impeller

Material: stainless steel

Technical details: Silica sol casting

Have our own CNC machining center and handcraft polishing factory

Supply capacity: 50 tons/month

Packaging: carton and steel crate

Min order quantity: 100pcs

Delivery time: 35-40 days after sample approval and deposit arrive

Delivery term: FOB Qingdao, CIF, CPT & more

1. Weight: 0.1 to 50kg available

2. Strict quality control system

3. Customized as print

4. Materials:

Carbon steel: AISI 1020, AISI 1035, AISI 1045, GrD (Q235), Gr50 (Q 345)

Alloy steel: AISI 1062, AISI A387Cr 12, 20CrMo, AISI 4137, AISI 4140, AISI 4340, AISI 431, 20 CrMnMo

Stainless steel: ASTM 304, ASTM 304L, ASTM 316, ASTM 316L

5. Process: precision casting and machining

6. Tolerance: ISO 8062 CT5-6

Introduction

Closed impellers are engineered for environments requiring high pressure, predictable flow, and minimal hydraulic loss. These impellers are ideal for clean-water systems such as HVAC circulation, irrigation, boiler feed pumps, and cooling towers.

Structural Advantages

Closed impellers feature front and rear shrouds that enclose the blades, creating a controlled fluid channel. This design enhances efficiency by reducing internal leakage.

Enhanced Energy Efficiency

The enclosed design ensures consistent energy transfer from the motor to the fluid.

Reduced Noise & Vibration

The precisely balanced structure minimizes operational noise, making the impellers suitable for residential, medical, and commercial systems.

Material Options

• Bronze for marine and potable water systems

• Stainless steel for corrosion resistance

• Composite materials for lightweight applications

  
  

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Hydraulic Optimization

The enclosed blades reduce turbulence, ensuring higher head pressure and stable performance.

Applications

• Clean water centrifugal pumps

• Air-conditioning and heating systems

• Cooling towers

• High-rise building water supply

Conclusion

Closed impellers deliver industry-leading efficiency and long-term reliability for clean-water and low-viscosity fluid applications.