Three-quarter view of a replacement FFU backward-curved centrifugal fan impeller

Cleanroom Equipment Spare Parts

FFU Fan Impeller (Fan Impeller)

A balanced backward-curved centrifugal wheel that replaces a damaged or contaminated FFU impeller while retaining the existing motor and housing.

Backward-Curved Blades
Low-Profile FFU Geometry
Balanced Rotating Assembly
Matched Hub Interface

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Perkenalan produk

The FFU fan impeller converts motor rotation into the pressure and airflow required to move room air through the final filter. Its shallow centrifugal geometry suits the limited plenum depth of a ceiling-mounted fan filter unit. Backward-curved blades, a formed inlet rim and a rigid backplate guide air through the wheel while limiting recirculation. Replacement selection must match the original outside diameter, wheel depth, rotation direction, hub bore and motor speed so the assembled fan operates within its intended airflow range.

Fitur utama:

Backward-curved blades provide stable non-overloading centrifugal fan characteristics.

A shallow wheel profile fits compact ceiling FFU housings without obstructing the inlet path.

The formed rim and rigid backplate retain blade spacing during high-speed rotation.

Machined hub options match common direct-drive motor shafts and fastening methods.

Kekhawatiran produk pelanggan

Impeller geometry and balance directly affect FFU airflow, sound and motor loading.

A wheel with the wrong diameter or depth changes the fan operating point.Replacement dimensions are matched to the original wheel envelope and FFU inlet clearance.

Incorrect blade direction produces weak airflow and excessive turbulence.Clockwise or counter-clockwise blade orientation is selected for the installed motor rotation.

Hub mismatch causes runout or prevents secure shaft attachment.Bore, keyway, set-screw and bolt pattern options are configured for the original drive shaft.

An unbalanced replacement transmits vibration to the filter and ceiling grid.The completed wheel is balanced as a rotating assembly after blade and hub fabrication.

Aplikasi yang Tipis

Cleanroom ceiling fan filter unitsLaminar-flow workstationsMini-environment circulation modulesFFU preventive-maintenance replacement

Parameter teknis

Typical construction ranges for low-profile FFU centrifugal impellers are shown below.

Bahan inti	Formed aluminum alloy or galvanized-steel backward-curved blade assembly
Ketebalan Panel (Panel Thickness)	60-180 mm nominal wheel depth
Efektif lebar	250-500 mm nominal outside diameter
Panjang maksimum	Up to 500 mm overall impeller diameter
Baja menghadap ketebalan	0.8-1.5 mm formed sheet-metal blades and backplate
Kepadatan inti (core density)	2700 kg/m³ for aluminum or 7850 kg/m³ for steel components
Konduktivitas Termal (Thermal Conductivity)	160-205 W/(m·K) for aluminum or 45-60 W/(m·K) for steel
Permukaan selesai	Natural aluminum or corrosion-resistant zinc-coated silver finish
Jenis Bersama	Formed blade tabs or welded blade roots with machined bolted or set-screw hub
Customization (Kustomisasi)	Tersedia berdasarkan aplikasi yang dimaksudkan dan lingkungan operasi.

Pilihan yang tersedia

Aluminum or galvanized-steel constructionClockwise or counter-clockwise rotationCustom hub bore and fasteningMatched diameter and wheel depth

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