The industrial high-pressure centrifugal fan series is engineered for demanding industrial processes requiring intense static pressure to overcome severe system resistance, long duct runs, or dense media loads. Built around robust welded carbon or stainless-steel scrolls and dynamically balanced impellers, these blowers deliver stable air performance without surging. Each unit is configured to match exact system curves for combustion systems, pneumatic conveying lines, and industrial dust collection networks.

Key Features

Heavy-Gauge Welded Construction: Scroll housings manufactured from structural steel plates (up to 12mm thickness) with continuous exterior welding to withstand internal static pressures up to 12,000 Pa.

Precision-Balanced Impellers: Backward-curved or radial blade wheels statically and dynamically balanced to ISO 1940 Grade G2.5, minimizing vibration transmission and bearing wear.

Thermal Endurance: Standard configurations handle airstream temperatures up to 80°C; optional high-temperature shaft extensions and cooling impellers support continuous operation up to 350°C.

Modular Drive Arrangements: Available in Arrangement 1 (overhung impeller, belt-driven), Arrangement 4 (direct drive coupled to motor shaft), and Arrangement 8 (double-supported bearing pedestals) to match plant layout and maintenance requirements.

Shaft Sealing Options: Utilizes labyrinth seals, carbon ring seals, or high-temperature packing glands to prevent fugitive gas leakage in pressurized or hazardous environments.

Technical Specifications

Parameter	Specification Range
Air Volume (Capacity)	1,000 – 150,000 m³/h (590 – 88,250 CFM)
Total Static Pressure	Up to 12,000 Pa (48 in. wg)
Operating Temperature	-20°C to 350°C (-4°F to 662°F)
Impeller Materials	Q345B Carbon Steel, Hardox 450 Wear-Resistant Steel, SS304, SS316L, Titanium
Motor Power Range	2.2 kW to 315 kW (IE3 / IE4 efficiency tiers)
Drive Types	Direct Drive (Arr. 4), Belt Drive (Arr. 1 / 3)
Balancing Standard	ISO 1940 Grade G2.5
Inlet/Outlet Orientation	Rotatable housing positions (0° to 360° in 45° increments)

Construction & Working Principle

Working Principle
The fan operates on the centrifugal principle. As the high-strength impeller rotates inside the scroll casing, mechanical energy from the motor is transferred to the air stream. Centrifugal force throws air outward from the blade tips into the volute casing, converting velocity pressure into stable static pressure. The tight clearance between the inlet cone and the wheel eye prevents internal recirculation, maintaining volumetric efficiency across high-resistance duct networks.

Manufacturing & Quality Control Infrastructure
Plate Cutting & Forming: CNC plasma cutting tables and 4-roll hydraulic plate bending machines ensure tight geometric tolerances on scroll casings and inlet funnels.
Welding Standards: All structural and pressure-containing welds performed by certified welders in accordance with AWS D1.1, utilizing ultrasonic (UT) and magnetic particle (MT) non-destructive testing (NDT) on critical seams.
Post-Weld Heat Treatment (PWHT): Large-capacity annealing furnaces relieve residual stresses in heavy impellers operating above 3,000 RPM.
Run-Test Stand: Every assembled unit undergoes a 4-hour full-speed mechanical run test, measuring bearing temperature stabilization, vibration velocity (mm/s RMS), and electrical draw prior to dispatch.

Applications

Pneumatic Conveying: Transporting bulk solids, plastic pellets, grains, and wood chips through long-distance pipelines.
Boiler Combustion Systems: Supplying primary and secondary combustion air or handling high-temperature flue gas extraction in industrial boilers.
Dust Collection & Filtration: Pulling air through high-resistance baghouses and multi-cyclone separators in cement, metallurgy, and mining plants.
Industrial Drying & Cooling: Delivering high-velocity air streams for continuous brick kilns, chemical drying beds, and metal quenching lines.

Available Options

Wear Protection: Hardfacing weld overlays, tungsten carbide coatings, or replaceable Hardox wear liners on blade tips for abrasive dust applications.

Corrosion Resistance: FRP lining, rubber lining, or specialized epoxy-phenolic coatings for chemical vapor extraction.

Silencer Packages: Inlet attenuators and acoustic lagging blankets to reduce noise levels below 85 dB(A) at 1 meter.

Instrumentation Ports: Factory-drilled vibration sensor mounting pads, temperature resistance detectors (Pt100), and differential pressure tap ports.

Manufacturing & Quality Control

Facility Equipment: 12,000W fiber laser cutters, CNC vertical machining centers for bearing pedestals, and computer-controlled dynamic balancing rigs capable of handling wheels up to 3.5 meters in diameter.

Traceability: Raw material mill test certificates (MTCs) retained for all structural plates and shafts; individual serial numbers stamped on impellers and casings for lifetime quality auditing.

Compliance & Global Standards: Manufactured under ISO 9001:2015 quality management systems. Equipment is engineered, fabricated, and tested to meet international benchmarks including AMCA air performance standards, OSHA safety guard requirements, and global electrical codes with CE, ATEX (for explosive gas atmospheres), and UL compliant components.

FAQ

Q: How do I select the correct fan static pressure for a complex duct network with multiple bends and cyclones?

A: Total static pressure must equal the sum of pressure drops across all system components (duct friction, filters, cyclones, heat exchangers) at the required operating temperature and elevation. Submit your system layout, volumetric flow rate, and gas composition (dust load, temperature, density) to our engineering team, and we will generate a complete fan selection curve using our internal aerodynamic sizing software.

Q: Can these fans be operated with Variable Frequency Drives (VFDs) for process flow control?

A: Yes. All impellers are evaluated for critical speed margins across the specified VFD operational frequency range (typically 30 Hz to 60 Hz). We recommend selecting motors with reinforced insulation (Class H) and bearing current grounding rings when pairing with high-switching-frequency VFDs to prevent electrical fluting.

Q: What documentation is provided with the shipment for quality audit and installation compliance?

A: Each shipment includes a comprehensive Technical Data Package containing: the Operation & Maintenance (O&M) manual, certified dimensional general arrangement (GA) drawings, dynamic balancing test certificates, motor test reports, mill test certificates for primary structural metals, and recommended spare parts lists.

Q: How are the fans packaged and secured for international ocean freight?

A: Units are secured to heavy-duty ISPM 15 compliant heat-treated wooden skids. Machined surfaces (shaft ends, flanges) receive anti-corrosion coating, and the entire assembly is wrapped in heavy-gauge VCI (Vapor Corrosion Inhibitor) plastic film and moisture-barrier covers to withstand marine transport conditions.

Q: What is the standard lead time for a custom-engineered high-pressure fan with abrasive-resistant lining?

A: Standard catalog configurations ship within 4 to 6 weeks. Custom builds requiring specialized alloy selection (e.g., SS316L, Hardox 450), special motor voltages (e.g., 575V/60Hz), AMCA-compliant testing, or ATEX explosion-proof compliance typically require 6 to 9 weeks, inclusive of dynamic balancing and factory run-testing.

Q: How do you prevent premature impeller failure when handling abrasive dust such as fly ash or cement powder?

A: For abrasive environments, we utilize backward-inclined radial blade designs that minimize particle impingement. We apply tungsten carbide thermal spray coating or bolt-on Hardox 450 wear plates directly to the blade surfaces. Additionally, all high-abrasion wheels undergo secondary dynamic balancing after coating application.

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