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  • HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation
  • HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation
  • HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation
  • HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation
  • HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation
  • HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation
HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation
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HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation

$0.70-$0.70/ Piece|100 Piece/Pieces (1 lot) (Min. Order)
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HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • Duct Size Adaptation: Connects and transitions between ducts of varying diameters, enabling seamless airflow optimization in HVAC systems.
  • Material Durability: Constructed from galvanized steel, providing corrosion resistance and long-term reliability in harsh environments.

Key features

  • 1. Galvanized Steel Construction for Enhanced Durability

    • With galvanized steel material, you can ensure long-lasting performance in humid or corrosive environments. This coating outperforms standard steel fittings by up to 50% in corrosion resistance*, making it ideal for demanding HVAC applications.

  • 2. Customizable Diameter Design for Seamless Integration

    • With tapered, multi-diameter compatibility, you can connect ducts of varying sizes without compromising airflow efficiency. This design reduces installation complexity compared to rigid, fixed-size connectors*, enabling quick adaptation to diverse systems.

  • 3. High-Pressure Tolerance for Reliable Performance

    • With pressure resistance up to 1,500 Pa, you can maintain stable airflow in high-demand HVAC systems. This exceeds the capacity of conventional galvanized connectors by 20%*, ensuring reliability in commercial or industrial settings.

  • 4. Optimized for Commercial HVAC Ventilation Systems

    • Designed for large-scale ventilation setups, you can achieve uniform airflow distribution across expansive commercial spaces. Its smooth-surface geometry minimizes turbulence, delivering 30% less airflow resistance* than abrupt connectors.

  • 5. Compliance with Industry Safety Standards

    • Certified to ASME/ANSI standards for HVAC components, you can ensure safety and regulatory compliance in critical applications. This guarantees compatibility with commercial-grade HVAC systems and industrial codes.

Product details

HVAC Duct Reducer and Increaser Connector Galvanized Spiral Duct Fittings for Ventilation

The HVAC Duct Reducer and Increaser Connector is a galvanized steel fitting designed to seamlessly connect ducts of varying diameters in ventilation and air conditioning systems. Its corrosion-resistant material and tapered design ensure efficient airflow transitions, making it ideal for commercial and industrial HVAC applications.

Technical specifications

FeatureSpecificationApplication Scenario
MaterialGalvanized steelCorrosion resistance in humid environments
Diameter RangeCustomizable (6-36 inches)Adapting duct sizes in ventilation systems
Pressure RatingUp to 1,200 Pa (Pro Model)High-pressure industrial airflow systems
Surface FinishSmooth galvanized coatingReducing turbulence in ductwork
CertificationCE, ISO 9001Compliance for global HVAC installations

Customization guide

Adjustable inlet/outlet diameters and material thickness to meet specific duct size requirements or pressure demands. Ideal for custom HVAC designs in commercial buildings or industrial plants.

Get inspired

With its tapered geometry and galvanized steel construction, this reducer ensures smooth airflow transitions between ducts of different sizes. Perfect for optimizing ventilation in schools, hospitals, or manufacturing facilities.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Corrosion ResistanceGalvanized steelDouble-layer coatingTriple-layer coating*
Max Pressure Rating500 Pa800 Pa (+60%)1,200 Pa (+140%)*
Diameter Range6-24 inches6-30 inches6-36 inches
Wall Thickness1.2mm1.5mm2.0mm (+67%)

Supplier's note

  1. Technical Breakthroughs:

    • Triple-layer coating (Pro Model): 3x longer lifespan in corrosive environments compared to standard galvanized steel.
    • 1,200 Pa pressure rating: 20% higher than industry benchmarks, enabling use in high-demand industrial systems.
    • Customizable diameters: Accommodates non-standard duct sizes without compromising airflow efficiency.

  2. Version Selection Guide:

    • Base Model: Ideal for residential HVAC systems or low-pressure commercial applications (e.g., office buildings).
    • Advanced Model: Suitable for medium-scale industrial plants requiring corrosion resistance and expanded diameter flexibility.
    • Pro Model: Designed for extreme environments (e.g., chemical plants, data centers) where durability and high-pressure handling are critical.

With the Pro Model’s triple-layer coating, you can ensure safe operation in corrosive industrial settings. Pair its 2.0mm wall thickness with a 36-inch diameter range to handle large-scale ventilation demands.

Frequently asked questions

  • Which HVAC duct reducer suits commercial ventilation systems with high airflow demands?

  • How do I clean and maintain galvanized steel HVAC duct reducers to prevent corrosion?

  • Galvanized steel vs stainless steel duct reducers: Which is better for outdoor HVAC installations?

  • Can HVAC duct reducers be customized to connect non-standard pipe diameters?

  • Are these galvanized steel reducers certified for high-temperature HVAC applications?

  • What’s the difference between a duct reducer and increaser, and how do I choose?

  • How do galvanized steel reducers prevent corrosion in humid HVAC environments?

  • Are these reducers compatible with existing galvanized spiral duct systems?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Material CompositionIndustrial HVAC systemsIndustry Standard: Mild Steel (ASTM A36)
Our Base: Galvanized Steel (ASTM A123, 60-90 g/m² zinc coating)
Our Advanced: Stainless Steel 304 (ASTM A240)		Base/Advanced resist corrosion better than mild steelAdvanced versions cost 30-50% more than Base
Corrosion ResistanceCoastal or humid environmentsIndustry Standard: Passivation (ASTM A268) for 24hrs
Our Base: 500+ hours salt spray (ASTM B117) ▲
Our Advanced: 1000+ hours salt spray ▲▲		Base/Advanced reduce maintenance in corrosive areasAdvanced requires more careful handling
Airflow EfficiencyHigh-demand ventilation systemsIndustry Standard: 1,000 CFM (ISO 5010)
Our Base: 1,200 CFM ▲ (20% improvement)
Our Advanced: 1,500 CFM ▲▲ (50% over standard)		Base/Advanced reduce energy costs by optimizing airflowAdvanced may have higher pressure drop
Noise LevelOffice buildings needing quiet operationIndustry Standard: 55 dBA (ISO 3095)
Our Base: 48 dBA ▲ (13% quieter)
Our Advanced: 43 dBA ▲▲ (22% quieter than standard)		Base/Advanced suitable for noise-sensitive areasAdvanced connectors may be heavier
Installation CompatibilityRetrofitting existing systemsIndustry Standard: Standard flanges (ANSI/HVAC 12-01)
Our Base: Universal flanges (fits 3 pipe sizes) ▲
Our Advanced: Quick-connect (no tools) ▲▲		Base/Advanced save installation time and laborAdvanced connectors may be less durable
Temperature ResistanceIndustrial ovens or high-temp zonesIndustry Standard: Up to 150°C (ASTM A537)
Our Base: 200°C ▲
Our Advanced: 250°C ▲▲		Advanced handles extreme temps in industrial settingsAdvanced versions require specialized storage

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