Corrosion-Resistant Centrifugal Fan
The QIYUE FAN 304 Stainless Steel Corrosion-Resistant Centrifugal Fan is designed for ventilation systems where ordinary carbon steel may be affected by moisture, surface rust or mild chemical exposure.
This is not one fixed fan model. The final centrifugal fan platform is selected according to airflow, total pressure, gas composition, operating temperature, dust content, installation arrangement and required drive type.
Depending on the project, the casing, impeller, inlet cone and other gas-contact components can be manufactured from 304 stainless steel. Full stainless steel construction, stainless steel wetted parts and hybrid material configurations are available.
A practical material option between painted carbon steel and higher-alloy corrosion-resistant construction.
Better resistance to atmospheric rust and humid operating environments than ordinary painted carbon steel.
Suitable for fabricated casings, impellers, inlet cones and project-specific welded fan components.
Provides a durable, cleanable metallic surface for selected food, pharmaceutical and clean manufacturing environments.
Available as full stainless steel construction, selected air-contact parts or a cost-controlled hybrid configuration.
The casing, impeller and principal structural air-contact components are manufactured from 304 stainless steel. Purchased mechanical components remain subject to separate material confirmation.
Components directly exposed to the conveyed gas use 304 stainless steel, while external supports, bearing pedestals and non-contact structures can remain carbon steel.
A practical configuration in which the two principal gas-handling components use stainless steel while the base, transmission support and motor arrangement use conventional industrial materials.
Different components can use different materials according to the gas-contact boundary, corrosion exposure, structural requirements and project budget.
Welded stainless steel casing with project-specific plate thickness, external reinforcement, inlet flange, discharge flange, inspection opening, drainage and lifting provisions.
Backward-curved, forward-curved or radial blade construction selected according to airflow, pressure, efficiency, gas cleanliness and dust conditions.
The stainless steel inlet cone guides airflow into the impeller eye. Correct alignment and inlet clearance support stable aerodynamic performance.
Shaft material is selected according to torque, speed and mechanical load. Stainless steel sleeves can be provided where exposed sections require corrosion protection.
Available with carbon steel, coated steel or stainless steel base structures, depending on environmental exposure and project requirements.
Direct, belt or coupling drive can be selected according to fan size, speed, temperature, maintenance requirements and motor position.
Workshops, washing areas, utility ventilation and process areas exposed to moisture.
Low-dust and mildly corrosive industrial exhaust streams.
Applications where a cleanable metallic construction is preferred.
Air extraction from process equipment and humid machinery enclosures.
Only after reviewing composition, concentration, temperature and condensate.
May require 316L, duplex stainless steel, titanium or another material.
Chemical type, concentration, temperature and water content must be supplied.
Condensate may be more corrosive than the original gas stream.
Corrosion resistance does not automatically provide wear resistance.
High-temperature duty requires a separate thermal and structural review.
Fan platform, size, speed and motor power are selected from the required operating point.
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Fan Platform
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General Positioning
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Typical Selection Direction
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4-72 Type
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General industrial centrifugal ventilation
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Medium airflow and low-to-medium pressure
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4-73 / 4-79 Type
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General process ventilation
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Larger airflow or project-specific duty
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9-19 Type
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High-pressure centrifugal fan
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Lower airflow with higher system resistance
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9-26 Type
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High-pressure industrial fan
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Higher-pressure process ventilation systems
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Custom Design
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Project-specific configuration
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Special dimensions, materials or installation requirements
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The table provides general structural directions only and does not represent a fixed performance range.
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Fan Material
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Full 304 stainless steel or selected gas-contact components
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Fan Type
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Customized centrifugal fan
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Impeller Type
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Backward-curved, forward-curved or radial, subject to duty
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Airflow and Pressure
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Selected according to the system operating point
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Drive Arrangement
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Direct, belt or coupling drive
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Rotation and Outlet
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Clockwise or counterclockwise with project-specific discharge angle
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Motor
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Standard, variable-frequency or explosion-proof motor
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Optional Accessories
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Damper, flexible connector, vibration isolator, guard, inspection door and drain
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Higher material cost does not automatically mean better suitability for every gas composition.
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Material
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General Advantage
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Main Limitation
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Selection Direction
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Painted Carbon Steel
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Economical and structurally versatile
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Coating damage can expose the base steel
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Dry, non-corrosive industrial air
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304 Stainless Steel
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Good general corrosion resistance and cleanable surface
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Limited in severe chloride or strong chemical environments
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Humid and mildly corrosive air
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316L Stainless Steel
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Improved resistance in many wet and chloride conditions
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Higher cost and still requires chemical review
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More demanding wet or chemical environments
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FRP
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Resistance to many corrosive chemicals
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Temperature, abrasion and structural loading require review
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Chemical exhaust at suitable temperature
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Titanium
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Strong resistance in selected severe media
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High material and fabrication cost
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Severe project-specific corrosive gas
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This comparison provides general selection guidance and is not a chemical compatibility chart.
Compare material options and review the complete corrosive gas exhaust route before confirming the fan configuration.
Stainless steel selection alone does not guarantee a reliable fan. Fabrication, balancing, alignment and inspection remain essential.
Confirm grade, plate thickness, component scope and required certificates before production.
Control casing geometry, weld sequence, heat input, deformation and internal surface condition.
Balance the fabricated impeller after welding and dimensional inspection according to the agreed acceptance criteria.
Check dimensions, rotation, shaft alignment, trial operation, vibration and packing before shipment.
Airflow
Static or total pressure
System resistance
Adjustment range
Continuous operating time
Complete gas composition
Chemical concentration
Normal and maximum temperature
Humidity and condensation
Dust concentration and particle size
Indoor or outdoor installation
Inlet and discharge arrangement
Available space
Rotation direction
Foundation and duct dimensions
Full stainless steel construction
Casing and impeller only
Air-contact parts only
Surface treatment requirements
Material certificate requirements
Suitability depends on acid type, concentration, temperature, moisture and condensate. A material review is required before selection.
316L is generally considered for more demanding wet, chloride-containing or chemical conditions, but neither grade is universally suitable for every corrosive medium.
Yes, but all components exposed to the gas should be reviewed. A stainless steel impeller alone does not protect the casing, inlet cone or internal fasteners.
No. The displayed fan represents one possible structure. Stainless steel construction can be applied to different fan platforms according to airflow and pressure.
Yes. Please provide the hazardous-area classification, gas group, temperature class, electrical standard and power supply.
Material certificates can be supplied when specified before production. A performance curve can be prepared after the final fan size, speed and duty point are confirmed.
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