Concentric Reducer with EPDM Gasket
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Concentric Reducer with EPDM Gasket

Galvanized Steel Concentric Reducer with EPDM Gasket for Spiral HVAC Duct Systems

Galvanized steel concentric reducer for spiral duct systems, available with EPDM gasket or standard non-gasket version for secure and efficient diameter transition.

 

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Product Description

The Concentric Reducer with EPDM Gasket is designed for connecting two round spiral ducts of different diameters in HVAC ventilation systems. Its concentric design ensures a centered airflow transition, helping maintain stable air distribution and reduce turbulence in the duct network.

Manufactured from high-quality galvanized steel, this reducer offers good corrosion resistance, reliable structural strength, and long service life. The integrated EPDM gasket improves airtightness, reduces air leakage, and enables faster installation without additional sealing materials.

Available in multiple diameter combinations, this fitting is widely used in commercial, industrial, and residential ventilation systems. Positive and negative tolerance options are also available to match different duct connection standards.

Key Features

  • Concentric Reduction Design   Provides smooth airflow transition between different duct diameters
  • Integrated EPDM Gasket   Improves sealing performance and reduces leakage
  • Galvanized Steel Construction  Durable, corrosion-resistant, and suitable for long-term use
  • Multiple Diameter Options  Available in a wide range of size combinations
  • Tolerance Options Available  Positive and negative tolerances can be selected
  • Easy Installation  Suitable for fast connection in round spiral duct systems

Applications

  • HVAC ventilation systems
  • Spiral round duct connections
  • Commercial air distribution systems
  • Industrial exhaust and fresh air systems
  • Air conditioning duct installations
  • Residential ventilation networks

Technical Specifications

Parameter Value
Product Name Concentric Reducer with EPDM Gasket
Model RCX
Material Galvanized Steel
Thickness 0.5 mm
Diameter Range 100 – 315 mm
Connection Type Slip Fit / Gasket Connection
Gasket Material EPDM
Type Concentric Reducer

Size Range (Example)

Size D (mm) D1 (mm) L2 (mm) H (mm)
100-80 98.8 78.8 50/55 40/45
125-80 123.8 78.8 50/55 40/45
150-80 148.7 78.8 50/55 40/45
160-80 158.7 78.8 50/55 40/45
180-125 178.6 123.8 50/55 40/45
200-80 198.6 78.8 50/55 40/45
250-100 248.5 98.8 50/55 40/45
300-200 298.4 198.6 50/55 40/45

More sizes are available upon request.

Versions Available

  • Concentric Reducer with EPDM Gasket  Designed with pre-installed EPDM sealing rings for improved airtightness, reduced leakage, and faster installation.
  • Standard Concentric Reducer Standard non-gasket version for conventional duct connections or projects requiring additional on-site sealing treatment.

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