HVAC

Circular Duct Connectors

VerroLoc circular flange ring system or circular duct connectors, are designed specifically to provide an economical method of jointing for circular ducts, suitable for straight seamed or spirally wound ductwork. The VerroLoc system comprises two flange profiles produced to suit the required duct diameter. Speak to our sales office about the options of integral sealant to provide an airtight ductwork connection when correctly fitted to the end of the duct section. On site the duct sections are assembled using the provided VerroLoc closure ring, the accuracy of our production ensures that a minimum amount of effort is required to fit the flange on to the duct. Our VerroLoc Circular Flange Ring System reduces fabrication and installation time of conventional RSA flanges and provides easy removal of ductwork sections for cleaning and maintenance purposes. In the absence of established industry testing procedures, the VerroLoc circular flange ring system was independently tested in accordance with the HVCA air leakage test procedures for Ductwork Jointing Systems DW/TM1.

  • VERROLOC SYSTEM 15
    VERROLOC SYSTEM 15
    • Ranges from 300mm - 355mm in size.
    • Suitable for straight seemed or spirally wound ducts.
    • Reduces fabrication and installation time compared to RSA Flanges.
    • Easy removal of duct sections for cleaning or maintenance purposes .
    • Accuracy of production ensures minimum efforts to fit flange ring to duct.
    • Easier installation in confined spaces when compared to RSA Flanges.
    • Independently tested by BSRIA, proven to work within requirements of UK HVCA Specification DW144.
    • A sealant pocket is rolled into the profile allowing effective sealing of ring to duct. Permanent non-setting, non-toxic sealant can be injected into the profile if requested.
    • Quick closure and release latch with safety wedge available up to 900mm diameter for rapid removal of duct sections.
    • Manufactured from Galvanised Mild Steel for corrosion resistance, avoids need for secondary painting. Also available in 304L & 316L Stainless Steel.
  • VERROLOC SYSTEM 20
    VERROLOC SYSTEM 20
    • Ranges from 400mm - 900mm in size.
    • Suitable for straight seemed or spirally wound ducts.
    • Reduces fabrication and installation time compared to RSA Flanges.
    • Easy removal of duct sections for cleaning or maintenance purposes .
    • Accuracy of production ensures minimum efforts to fit flange ring to duct.
    • Easier installation in confined spaces when compared to RSA Flanges.
    • Independently tested by BSRIA, proven to work within requirements of UK HVCA Specification DW144.
    • A sealant pocket is rolled into the profile allowing effective sealing of ring to duct. Permanent non-setting, non-toxic sealant can be injected into the profile if requested.
    • Quick closure and release latch with safety wedge available up to 900mm diameter for rapid removal of duct sections.
    • Manufactured from Galvanised Mild Steel for corrosion resistance, avoids need for secondary painting. Also available in 304L & 316L Stainless Steel.
  • VERROLOC SYSTEM 30
    VERROLOC SYSTEM 30
    • Ranges from 1000mm - 2000mm in size.
    • Suitable for straight seemed or spirally wound ducts.
    • Reduces fabrication and installation time compared to RSA Flanges.
    • Easy removal of duct sections for cleaning or maintenance purposes .
    • Accuracy of production ensures minimum efforts to fit flange ring to duct.
    • Easier installation in confined spaces when compared to RSA Flanges.
    • Independently tested by BSRIA, proven to work within requirements of UK HVCA Specification DW144.
    • A sealant pocket is rolled into the profile allowing effective sealing of ring to duct. Permanent non-setting, non-toxic sealant can be injected into the profile if requested.
    • Quick closure and release latch with safety wedge available up to 900mm diameter for rapid removal of duct sections.
    • Manufactured from Galvanised Mild Steel for corrosion resistance, avoids need for secondary painting. Also available in 304L & 316L Stainless Steel.

VerroLoc Circular Flange Ring System

Circular duct connectors are essential components for joining sections of circular ductwork in HVAC systems. The VerroLoc Circular Flange Ring System ensures a secure and airtight connection, allowing smooth airflow while minimising energy loss. These connectors play a critical role in maintaining the efficiency and reliability of duct systems, particularly in demanding industrial and commercial applications.

Designed with precision engineering and tested to the highest industry standards, it simplifies installation and enhances system performance. This innovative system ensures seamless connections, reduces energy waste, and improves the overall efficiency of HVAC ductwork.

Key Features Of Our System

The VerroLoc system provides an affordable method for connecting circular ducts. It is compatible with both straight-seamed and spirally wound ductwork, making it versatile for various HVAC setups. By eliminating the need for more complex jointing systems, it reduces costs without compromising on performance.

Versatility for Different Duct Diameters

The flange ring system is available in sizes to suit a wide range of duct diameters. This flexibility ensures compatibility with different HVAC configurations, simplifying project planning and procurement.

Airtight Connections with Integral Sealant

For enhanced performance, the VerroLoc system offers an integral sealant option. This ensures airtight connections that prevent air leakage, improving energy efficiency and maintaining consistent airflow. Airtight seals are essential for achieving optimal system performance in high-demand environments.

Easy Installation with Minimal Effort

The VerroLoc system is designed for quick and straightforward installation. Its precise manufacturing ensures a perfect fit, requiring minimal effort to attach the flanges to the duct. The closure ring included in the system makes assembly fast and secure, reducing on-site labour time and costs.

Reduced Installation and Fabrication Time

Compared to conventional RSA flanges, the VerroLoc system significantly cuts down on installation and fabrication time. This streamlined process allows contractors to complete projects faster while maintaining high standards of quality and reliability.

Independently Tested for Air Leakage

The VerroLoc system has been independently tested to meet HVCA air leakage compliance standards (DW/TM1). This rigorous testing ensures that the system delivers airtight duct connections, reducing energy waste and supporting long-term system efficiency.

Applications of Circular Duct Connectors

Circular duct connectors play a vital role in ensuring efficient and reliable HVAC system performance across various environments. Their versatility and airtight sealing capabilities make them indispensable in both commercial and industrial settings.

Ideal for Commercial and Industrial HVAC Systems

Circular duct connectors are specifically designed to meet the demands of commercial and industrial HVAC systems. They provide secure and durable connections, ensuring consistent airflow even in high-pressure environments. Whether used in small office buildings or large-scale factories, these connectors deliver exceptional performance.

Airtight Solutions for Spiral and Straight-Seamed Ductwork

Projects that require airtight spiral or straight-seamed ductwork benefit significantly from circular duct connectors. The VerroLoc Circular Flange Ring System ensures a precise fit, creating airtight seals that prevent energy loss and improve system efficiency. This makes them particularly suited to environments where airflow consistency is critical.

Common Applications

Circular duct connectors are widely used in various industries and building types:

  • Office Buildings: Maintain efficient airflow for heating, cooling, and ventilation systems.
  • Cleanrooms: Provide airtight seals to control airflow and minimise contamination.
  • Hospitals: Support critical ventilation systems in sterile and patient care areas.
  • Factories: Ensure reliable performance in large-scale industrial ventilation systems.

Why Choose the VerroLoc Circular Flange Ring System?

The VerroLoc Circular Flange Ring System from Doby Verrolec is a trusted solution for modern HVAC ductwork. Designed with precision engineering and a commitment to quality, VerroLoc stands out as the preferred choice for contractors and engineers seeking efficiency, durability, and performance.

Backed by Doby Verrolec’s Expertise

Doby Verrolec has a longstanding reputation for delivering high-quality ductwork solutions. With decades of experience in the HVAC industry, the company continually innovates to meet the evolving needs of its customers. The VerroLoc system reflects this expertise, combining advanced design with rigorous quality standards.

Proven Track Record and Independent Testing

The VerroLoc Circular Flange Ring System has a proven track record of reliability in demanding applications. It has undergone independent testing in accordance with HVCA air leakage compliance standards (DW/TM1). This ensures the system delivers airtight connections that minimise energy loss and maintain consistent airflow.

Benefits Over Conventional Alternatives

Compared to traditional RSA flange systems, the VerroLoc system offers significant advantages:

  • Faster Installation: Precise manufacturing and innovative design reduce labour time and project delays.
  • Improved Efficiency: Airtight seals enhance HVAC performance, lowering energy consumption.
  • Ease of Maintenance: Quick removal and reinstallation make cleaning and inspections simple.
  • Durability: Built with robust materials for long-lasting performance, even in high-pressure systems.

Trusted by Professionals

VerroLoc is trusted by HVAC contractors, engineers, and project managers for its reliable air sealing solutions and efficiency-enhancing design. Its ability to improve system performance while reducing installation time makes it a standout choice in the industry.

FAQs About Circular Duct Connectors

What materials are used in the VerroLoc circular flange ring system?

The VerroLoc circular flange ring system is made from high-quality galvanised steel. This material provides excellent durability, corrosion resistance, and long-term performance, even in high-pressure HVAC systems. The robust design ensures reliable and secure connections for both straight-seamed and spiral ductwork.

How does the integral sealant improve duct sealing?

The integral sealant in the VerroLoc system creates an airtight seal at the duct joint, preventing air leakage. By ensuring consistent airflow, it improves energy efficiency and reduces operational costs. This sealant also helps meet stringent air leakage standards, making it ideal for applications requiring high-performance airtight connections.

Is the VerroLoc system compatible with spiral ductwork?

Yes, the VerroLoc system is fully compatible with spiral ductwork. Its precision-engineered flange profiles and closure rings are designed to fit seamlessly with both spiral and straight-seamed ducts. This versatility makes it a reliable solution for various HVAC applications.

Can circular duct connectors reduce air leakage in HVAC systems?

Absolutely. Circular duct connectors like the VerroLoc system are designed to minimise air leakage by creating secure, airtight joints. With independently tested performance and integral sealant options, these connectors enhance HVAC system efficiency, reduce energy waste, and maintain optimal airflow.

What is the installation process for VerroLoc connectors?

Installing VerroLoc connectors is straightforward and efficient. The process involves aligning the flange profiles to the duct ends and securing them with the provided closure ring. Thanks to precision manufacturing, the connectors require minimal effort to attach. The airtight sealant, if included, ensures a secure and leak-free joint, reducing installation time compared to conventional RSA flanges.

 

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