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Engel® Transverse Duct Flange (TDF) T25b Rollformers
With Engel Transverse Duct Flange (TDF) Roll Formers, you can roll form your own seal-able flanges on transverse duct joints during the fabrication process for both fittings and straight duct applications. Engel TDF T25b Rollformers feature patented TDF Rolls that produce the TDF flange with unique buttons for snap-in corners on the machine's left-hand outboard side. Optional rolls are also available for the clip. These are the only transverse duct flange machines on the market certified to comply with SMACNA Duct Construction Standard (DCS) T-25b based on actual laboratory tests across the full range of water gauges.
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Engel® 800 Series Pittsbugh Lock Rollformers
The Pittsburgh Lock revolutionized the HVAC Industry in the late 1930’s and is still used today for its strength and ease in assembling ductwork. The Engel 800 Series Pittsburgh Lock Roll Formers have eight (8) forming stations with two (2) forming positions. One inboard forming position forms the Pittsburgh lock and one auxiliary or outboard forming position has the capability of forming 1 of 3 different profiles. Three models to choose from to meet your operational needs.
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Engel® 800 Series Button Punch Snap-Lock Rollformers
Engel 800 Series Button Punch Snap Lock Roll Formers form a two piece seam that greatly simplifies ductwork assembly. The male seam is a button, the female seam is a snap lock and the two snap together for a flush corner. These machines are available with eight forming stations. Not only do these locks assemble twice as fast as traditional methods, but because the two pieces nest, they are easier to transport as well. Three models to choose from to meet your operational needs.
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Rollformers
HVAC Duct Coil Lines
Engel®
Quality Automated Roll Forming Machinery and Duct Coil Lines for HVAC Duct and Fittings Manufacturing
Engel is recognized as one of the leading suppliers of quality sheet metal forming machinery and systems. For over seventy years, Engel has designed and built practical, cost-efficient equipment providing solutions to a broad range of manufacturing problems. Whether you’re investing in our HVAC coil Lines, roll formers — including the Transverse Duct Flange (TDF)— our heavy-duty, cost-effective machinery is what Engel customers have come to depend on.
Serving the HVAC Duct Fabrication Industry
Since 1949, Engel has been designing and building practical, cost-efficient equipment solutions to solve a broad range of HVAC sheet metal duct fabrication manufacturing challenges. Engel supplies systems and solutions which meet or exceed standards established by national, state, and local code bodies, and by recognized industry associations. Engel is the leader in providing the best value in machines, systems, and support services for customers while remaining dedicated to providing state-of-the-art equipment at a fair price.
Featured Products
Engel has a long history of providing reliable and long-lasting sheet metal forming and cutting machinery and solutions. Below are some of our best-selling products — please don’t hesitate to contact us to see how Engel can delivery a solution that’s right for your operation.
Service and Support
When you partner with Mestek Machinery, you partner with the largest service network in the industry. No other company in the industry delivers the level of experience, innovation, creativity, and integrated value-added processes. Whether it’s a replacement part, troubleshooting an existing process, operator training, or participating in a kaizen event to optimize your existing installation, our experienced team of engineers and technicians is here to help keep your operation running at peak performance.
Other Support Services
Resources from Mestek Machinery
Backed by over 100 years of expertise and experience in metal forming and fabrication, Mestek Machinery has developed a number of valuable resources to help HVAC duct and fittings fabricators and other industry professionals learn more about the technologies and processes that drive your operations.
Video
2025 Catalog
Product Brochures
E-Books and White Papers
News and Updates
The Mestek Machinery Blog
Video Podcast Series
Success Stories
We’re Here to Help
Have questions about Engel machinery and equipment? Looking for help on a unique application? Need help with a budget estimate to determine overall equipment costs to evaluate if your project can be justified? Please don’t hesitate to reach out — we’d love to help.