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Highlights at a glance

1.Broad Dimensional Range.Cross-flow diameters 50-180mm, length up to 1000mm+. Axial impellers from LW151 to LW556. Centrifugal types include forward single/dual-inlet and backward curved. In-house tooling enables rapid OEM size and geometry modifications.

2. Engineered Materials. ABS+GF for standard HVAC duty. Reinforced AS for higher heat tolerance. PP for wet or chemical exposure. Material certification and UV stabilization available. We recommend optimal resin based on operating temperature to ensure service life.

3. Dynamic Balance & QC. CNC in-line balancing to G 6.3 standard minimizes vibration and noise. AQL sampling verifies bore tolerance and concentricity across batches. First-article reports available before volume production.

4. Full OEM Service. Custom RAL/Pantone colors, logo embossing, and white-label packaging supported. Shaft holes 4-12mm, sleeve depth up to 50mm, setscrew flats configurable. Rotation direction (CW/CCW) clearly specified per SKU. NDA protection provided.

5. Export Packaging & Capacity. Polybags, EPE dividers, 5-ply export cartons. ISPM 15 pallets. Scalable production supports both mid-volume wholesale and high-volume OEM. Lead time 15-25 days standard, 25-35 days custom.

6. CAD Design Support. 2D PDF/DWG and 3D STEP files available for standard impellers. Custom models generated for approval before tooling. Ensures accurate hub fit and blade clearance within your assembly.

7. Application Versatility.Impellers suit AC condensing units, air curtains, ventilation fans, heaters, and purifiers. Backward curved options support higher static pressure. Forward curved suits compact high-flow designs. We guide selection based on your system curve requirements.

8. Reliable Supply Chain.Manufacturing based in Yuyao, Ningbo-China’s HVAC component hub. Consistent resin sourcing and in-house molding capacity ensure stable delivery for long-term OEM programs. Sample orders available for performance validation.

About this supplier
LONGWELL is a globally recognized fan manufacturer,specializing in high-performance EC/DC/AC fans,blowers,and motor systems for HVACR applications.With over 20 years of export experience and millions of units produced annually,we deliver reliable airflow solutions to OEMs in more than 30 countries. Our extensive product range includes centrifugal fans,axial fans,cross-flow fans,forward curved blowers,and ECM motors widely used in AHUs,FFUs,purifiers,heating systems,and industrial ventilation.We are certified to ISO9001,ISO14001,BSCI, CE,UL/ETL,FCC,and RoHS standards,ensuring full compliance across global markets. As an innovation-driven company,Longwell integrates aerodynamic design,CFD simulation,and custom engineering to meet specific client needs.Backed by advanced R&D labs,flexible manufacturing,and a global sales network across 8 regions,we respond quickly with tailored fan solutions built for efficiency,durability,and compliance.
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FAQs
What level of customization does Longwell offer for plastic fan impellers in terms of dimensions and materials?
We accept any dimension, material, color, or performance change. Options include ABS+GF, Reinforced AS, PP. Cross-flow diameters range 50-180mm; axial outer diameters up to 556mm. Shaft holes from 4mm to 12mm are configurable. Provide drawings for OEM approval.

What is the typical Minimum Order Quantity (MOQ) and lead time for medium to high-volume wholesale orders?
MOQ is batch-based, typically hundreds per SKU for standard axial types. Higher volumes suit custom tooling. Lead time for standard items is 15-25 days. Customized models require 25-35 days due to specific material prep or mold setup.

How does Longwell ensure balance and quality consistency across large production batches?
We use in-line CNC dynamic balancing to G 6.3 standard. AQL sampling verifies bore tolerance and runout during production. First-article inspection reports and material certs are available. This ensures low noise and vibration for HVAC integration.

Do you provide OEM services including private labeling and custom color matching?
Yes. We offer RAL/Pantone color matching beyond standard options. Your logo can be embossed or printed. Packaging supports white-label, custom SKU labeling, and ISPM 15 palletization. NDA and drawing approval precede all OEM work.

What shaft and motor compatibility specifications should I consider when ordering axial blades or cross flow impellers?
Confirm rotation direction (CW/CCW) from shaft end. Specify shaft diameter (4-12mm) and setscrew flat location (e.g., 8-7mm). We adjust sleeve depth up to 50mm. Provide motor drawings to ensure precise hub alignment.

What is the application range for these plastic fan impellers? Are they suitable for high-temperature or wet environments?
Standard ABS+GF suits dry HVAC uses up to 70-80°C. For higher heat or chemical exposure, specify PP or Reinforced AS. Please state max operating temp and environment to prevent material creep or fatigue issues.

How are the fan impellers packaged to ensure they arrive undamaged for bulk sea freight shipments?
We use polybags, custom-cut EPE dividers, and 5-ply export cartons. Large diameters receive reinforced bracing. Pallets are ISPM 15 compliant fumigation-free wood. We adjust carton weight and stack height per your warehouse needs.

Can Longwell provide technical drawings or 3D models for integration into our product design phase?
Yes. We supply 2D PDF/DWG and 3D STEP files for standard impellers. For custom designs, we generate models for approval pre-tooling. This verifies blade clearance and hub depth before production, eliminating assembly errors.

Additional information

voltage

110/115/120/220/230/12/24/48
speed

4000 RPM, 1100rpm, 990rpm
mounting

Free Standing
Blade Material

Plastic
Material

Plastic, Aluminum Alloy, Steel
customized support

OEM, ODM, OBM

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