Engineered to overcome high static pressure losses in complex duct networks, baghouse filtration systems, and pneumatic conveying lines. This heavy-duty industrial exhaust fan maintains stable airflow against severe systemic resistance. Unit architecture combines continuous-weld structural steel casings with computer-balanced impellers to eliminate resonant vibration and withstand harsh operating cycles in manufacturing plants.

Key Features

High Static Pressure Output: Backward-curved and radial blade configurations generate high-pressure coefficients required for air pollution control equipment and cyclone separators.

Rigid Scroll Construction: Heavy-gauge carbon steel or stainless steel housings reinforced with external structural ribs to prevent panel flexing under peak operating pressure.

Precision Rotating Assembly: Impellers balanced dynamically to ISO 1940 Grade 2.5 standards to reduce bearing load and mechanical stress.

Flexible Drive Options: Direct drive (Arrangement 4) and belt drive (Arrangement 9/12) configurations match exact duty points and isolate motors from hot or corrosive airstreams.

Thermal Protection Capacity: Extended shaft assemblies and cast-iron heat slingers accommodate continuous airstream temperatures up to 250 degrees C.

Technical Specifications

Parameter	Specification / Range
Airflow Volume (CFM / m3/h)	1,000 to 50,000 CFM (1,700 to 85,000 m3/h)
Static Pressure Range	Up to 3,500 Pa (14 in. wg)
Impeller Diameter	315 mm to 1,600 mm
Motor Power Rating	1.5 kW to 160 kW
Operating Temperature	-20 degrees C to +250 degrees C
Housing Material Options	Q235B Carbon Steel, SS304, SS316L, Hardox wear-resistant plate
Drive Arrangements	Arrangement 4 (Direct), Arrangement 9 / 12 (Belt Drive)
Motor Protection Class	IP55 / IP56, IE3 / IE4 efficiency, ATEX explosion-proof compliance

Construction & Working Principle

Air enters axially through the precision-spun inlet cone and turns 90 degrees into the rotating impeller channels. Centrifugal acceleration forces air outward, increasing velocity and converting dynamic energy into static pressure within the scroll housing prior to discharge.

Casing Fabrication: Scroll housings are formed from laser-cut plate steel and joined via continuous MIG welding to prevent pressure leakage. Inlet and outlet flanges match standard industrial duct dimensions.

Shafts & Bearings: Drive shafts are machined from forged 45# steel or 42CrMo high-tensile alloy to strict micrometer tolerances. Rotating assemblies utilize heavy-duty self-aligning spherical roller bearings rated for an L10 operating life exceeding 100,000 hours.

Manufacturing & Testing: Production utilizes CNC fiber-laser cutting centers and automated welding fixtures for dimensional repeatability. Every impeller undergoes multi-plane dynamic balancing on computerized hard-bearing rigs. Hydrostatic pressure testing and non-destructive testing (NDT) on structural welds are available upon request.

Applications

Dust Collection Systems: Pulls negative pressure across baghouses, cartridge filters, and cyclone collectors in metal fabrication and woodworking plants.

Fume & Gas Extraction: Removes corrosive chemical vapors in industrial plating lines, wastewater treatment plants, and laboratory exhaust manifolds.

Pneumatic Conveying: Transports bulk materials, plastic regrind, wood chips, and textile fibers through enclosed transport ducts.

Industrial Drying & Curing: Recirculates and exhausts high-temperature air in industrial ovens, kilns, and metal finishing lines.

Available Options

Material Upgrades: Wetted components available in SS304, SS316L, titanium, or rubber-lined steel for aggressive chemical or abrasive dust environments.

Spark-Resistant Design: AMCA Type B construction featuring aluminum inlet cones and copper wear rings for combustible dust or volatile gas handling (NFPA 644/652 compliant).

Acoustic Enclosures: Factory-engineered weather-resistant sound attenuation hoods lowering operating noise down to 75 dBA at 1 meter.

Instrumentation Packages: Factory-pre-mounted Variable Frequency Drives (VFDs), vibration velocity sensors, and bearing temperature detectors wired to localized junction boxes.

Manufacturing & Quality

Factory operations employ automated plate processing and CNC press brakes to maintain scroll housing tolerances within +/-0.5 mm. Quality control protocols enforce strict verification benchmarks:

Raw material chemical composition and tensile strength verified via certified mill test reports.
Ultrasonic testing (UT) and magnetic particle testing (MT) performed on critical drive shafts and structural welds.
Two-hour full-load run testing measuring operational current draw, vibration velocity (mm/s), and bearing housing thermal stability prior to crating.

FAQ

Q: How do I select the correct fan size for a duct network with variable static pressure?

A: Provide your required volumetric flow rate (CFM or m3/h) and total calculated system resistance (static pressure in Pa or in.wg) at standard air density. Our engineers run selection software against certified fan performance curves to identify the proper impeller size, RPM, and motor kilowatt rating without risk of motor overload.

Q: What are the primary operational differences between direct drive and belt drive configurations?

A: Direct drive (Arrangement 4) mounts the impeller directly onto the motor shaft, reducing maintenance points and eliminating mechanical slip losses. Belt drive (Arrangement 9/12) uses sheaves and V-belts to allow on-site speed adjustment and isolates the motor driver from elevated airstream temperatures.

Q: Can these fans be certified for hazardous or explosive classified atmospheres?

A: Yes. Units can be configured with explosion-proof motors (ATEX or Class I/II, Division 1/2) alongside spark-resistant airstream components to eliminate mechanical friction sparks in explosive dust or vapor environments.

Q: What is the standard production lead time for custom-engineered fan configurations?

A: Standard carbon steel models ship within 3 to 4 weeks. Custom metallurgy, specialized coatings, or modified structural footprints require 6 to 8 weeks, including engineering drawing sign-off and balancing verification.

Q: How is vibration controlled during continuous high-RPM industrial operation?

A: Vibration is mitigated through precision dynamic balancing of the rotating assembly to ISO Grade 2.5, rigid structural housing stiffeners, and heavy-duty cast-iron pillow block bearings mounted on machined steel pedestals.

Q: What documentation is included in the shipment package?

A: Each shipment includes a complete technical data package containing certified performance curves, installation and maintenance manuals, motor spec sheets, dynamic balancing test reports, and mill test certificates for primary structural metals.

Request a Quote

To receive an engineered proposal and formal quotation, please provide the following operational parameters:

Required Airflow Volume (CFM / m3/h)
Total Static Pressure (Pa / in.wg)
Airstream Temperature and Composition (dust load, moisture, corrosive gases)
Electrical Supply Specifications (Voltage / Phase / Frequency / Hazardous location rating)

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