Replacement Requirements for Centrifugal Fan Housings and Impellers
On August 3, 2026, LONGWELL opened an engineering project to provide replacement housing and impeller assemblies for existing Yilida centrifugal fan units paired with a 12.7 mm motor shaft diameter. Building upon previous drawings for selected 200×190 and 145×190 units, LONGWELL engineering prepared technical drawings and specifications for six model designations: LWFC-145×160-03, LWFC-145×190-03, LWFC-180×200-03, LWFC-200×190-04, LWFC-200×190-05, and LWFC-225×250-01.
Engineering Specification and Drawing Deliverables
The design scope focuses on exact casing and forward-curved impeller matching for direct motor shaft mounting. On August 4, 2026, LONGWELL completed technical drawings and standard specification documentation. For example, technical drawing LWFC-200×190-05 specifies a galvanized sheet housing and impeller assembly featuring a casing height of 317 mm, an outer casing width of 261 mm, and a shaft bore tolerance specification of 12.7 (+0.027 / 0) mm. Technical drawing requirements specify that assembled impeller components undergo high-speed balance and stability checks at 2200 rpm for 8 hours without loosening, with unmarked dimensional tolerances adhering to CB/T1804-2000-C standards.
The table below lists baseline reference metrics from the provided reference data sheets for related wheel configurations:
| Model Reference | Wheel Diameter | Fan Mass | Speed Limit |
|---|---|---|---|
| LWFC 145 Base Reference | 145 mm | 1.01 kg | 1300 r/min |
| LWFC 180 Base Reference | 180 mm | 1.76 kg | 1400 r/min |
| LWFC 200 Base Reference | 200 mm | 3.49 kg | 1400 r/min |
| LWFC 225 Base Reference | 225 mm | 3.75 kg | 1400 r/min |
Request Custom Fan Components
If you require dimensional adaptation, custom housing matching, or balanced forward-curved centrifugal fan impellers for specific motor shafts, submit your mechanical drawings, shaft dimensions, and operational requirements. Contact our team through the LONGWELL contact page or search technical options using the LONGWELL Fan Selector.
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