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Our address: Main Buildings at 102 E. Railroad Ave., Knoxville, PA 16928
Main Buildings at 102 E. Railroad Ave., Knoxville, PA 16928
Phones: +15704046968
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+1 570 404 6968
Double Standing seam roof panel machine SS4E-15

The portable roof panel roll forming machine is intended to run multiple panel profiles providing you with roofing in various widths and shapes.

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Double Standing seam roof panel machine SS4E-15
Our products
HVAC round spiral duct making machine HVAC round spiral duct making machine
Decoilers Decoilers
Downspout equipment Downspout equipment
Elbow making machines for Round & Square ducts Elbow making machines for Round & Square ducts
HVAC Square Duct-work Machinery HVAC Square Duct-work Machinery
Lockforming machinery Lockforming machinery
Metal Spinning lathes and tools Metal Spinning lathes and tools
Rollforming Roofing and Custom Design machinery Rollforming Roofing and Custom Design machinery
Metal cutting and shearing equipment Metal cutting and shearing equipment
Special equipment Special equipment
Useful Articles

Useful Articles

Welcome to Stangroup US website! 

Stangroup is a company with over ten years experience in fields of engineering, building and service of various custom sheet metal forming machinery and equipment. Main fields of operation: HVAC, Downspout, Roofing, Roll-forming, Metal Spinning and Bending machines. 

Innovative Roofing Panel Machinery

Stangroup specializes in designing and manufacturing advanced roofing panel machines that let operators complete all essential tasks without extra setup. When specific adjustments or tool changes are needed, the machines allow easy and precise modifications.

Our team of engineers develops versatile metal roll-forming machines capable of producing virtually any metal profile. From compact, portable roofing machines to professional-grade systems for large-scale projects, Stangroup offers solutions for every level of production.

Flexible HVAC Spiral Duct Making Machinery

We deliver high-quality, cost-effective machinery for heating, ventilation, and air conditioning (HVAC) production. Our equipment is engineered for quick configuration, enabling manufacturers to produce premium-quality ducts and components efficiently.

Designed with adaptability in mind, most of our machines accommodate unique production requirements. A flagship product is our Spiral Duct Machine, which simplifies creating round air ducts. In addition, we provide complete solutions for establishing duct production lines, including high-performance modules for standard and custom diameters. Explore our HVAC product range to find tailored solutions for your business.

For present moment company represented in countries: United States, Canada,China, Russia and Ukraine.  The US branch DBA Liberty Seamless Machinery .

We'll be glad to be a partner in your business development.

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11/03/2026
Máquina para hacer láminas de techo | Liberty Seamless
Máquina para hacer láminas de techo | Liberty Seamless
En la industria moderna de la construcción, la velocidad y la calidad de producción juegan un papel decisivo. Cada vez más empresas constructoras y talleres metalúrgicos buscan soluciones que les permitan fabricar láminas metálicos para techos ..
11/09/2023
Rollforming machines: how they work, what types are available, and their uses.
Rollforming machines: how they work, what types are available, and their uses.
So you’re buying a roof panel machine. Buying any type of machine is a big investment. Knowing how portable rollforming equipment can benefit your business, what you can expect when buying a Liberty roof panel machine and how to keep it running for a long..