Duct Zipper

One-step duct seaming — replaces three traditional operations in a single pass.

Industrial ductwork seaming machine designed for high-volume HVAC fabrication shops seeking maximum throughput with minimal operator effort. Proven RAS technology with 2,000+ global installations delivers consistently tight rectangular duct joints while reducing production floor space requirements.

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Key Specs Overview Technical Specifications Applications Video FAQ Contact Related

Key Specs

Overview Points

Single-Pass Seaming

Combines roll forming, receiver lock, flange forming, and seam closing in one operation

Proven RAS Technology

Over 2,000 worldwide installations delivering consistently tight, clean rectangular duct joints

Universal Duct Compatibility

Handles any rectangular duct size and shape up to 700 mm (27 inches) in height

In-Line Workflow

Moves with ductwork—slide completed seam crosswise back to entry point for next cycle

Ergonomic Operation

Material guidance system handles alignment, reducing operator fatigue and manual adjustment

Heavy-Duty Construction

Painted steel frame with polished work surfaces built for continuous sheet metal production

Simple Controls

Integrated electrical panel provides straightforward operation with minimal training required

Key Features

Three Steps Reduced to One

Traditional rectangular duct seaming requires roll forming the lock, roll forming the flange, then connecting and closing the seam — three discrete operations that consume time and floor space. The Duct Zipper performs all three in a single smooth pass, producing a finished, airtight seam with each cycle.

Ergonomic In-Line Design

The machine’s linear layout moves along with the ductwork during seaming. After completing one seam, the operator places the duct crosswise onto the material guidance system and slides it back to the start position. This eliminates heavy lifting and awkward repositioning between seams, often saving an entire secondary operation.

Versatile Duct Handling

The system accepts rectangular ducts of any size and shape up to 700 mm (27 inches) in height. Whether producing small branch ducts or large trunk lines, the same machine handles the full range without tooling changes.

Consistent Joint Quality

The forming rollers produce extremely tight seams with clean, uniform profiles on every joint. This consistency reduces air leakage in finished ductwork and minimizes rework on the shop floor.

Industrial-Grade Construction

Built on a rigid steel frame with precision-ground work surfaces, the Duct Zipper is engineered for sustained daily production in high-volume fabrication environments. The robust design withstands the demands of continuous sheet metal processing across multiple shifts.

Technical Specifications

The RAS duct seaming technology has been proven in more than 2000 installations around the world, As being the most ergonomically advanced design. The result is the RAS Duct Zipper. It allows you to produce the highest quality duct work faster, easier, and more profitably than ever before!

RAS technology and engineering has taken the seaming process from the traditional three steps down to only one. Traditional methods roll form then receiver lock, the roll form the flange, and finally connect the two and close the seam. The RAS Duct Zipper does all this in one smooth and simple operation!

The result is a clean joint with, extremely tight ducts, and a remarkably fast throughput. The system supports ducts of any size and shape to a height of 700 mm (27 inches). This extremely productive “in-line design” moves through the machine along with the duct work.

After one seam is completed, the operator simply puts the duct crosswise onto the material guidance system and slides it back to the entry point, It’s that simple and, easy more than often its saves a second operation.

Applications

HVAC rectangular duct fabrication shops

Commercial and industrial ventilation system manufacturing

On-site duct assembly for construction projects

Sheet metal fabrication plants producing air conditioning ductwork

Prefabricated building component manufacturing

Machinery repair shops servicing ventilation infrastructure

Video

FAQ

What applications is Duct Zipper used for?

Duct Zipper is widely used in: HVAC rectangular duct fabrication shops; Commercial and industrial ventilation system manufacturing; On-site duct assembly for construction projects; Sheet metal fabrication plants producing air conditioning ductwork.

What is the warranty for NTBOBO machines?

All NTBOBO machines come with a 1-year warranty from the date of Bill of Lading. Our engineering team provides 24-hour technical support throughout the warranty period.

What payment terms does NTBOBO accept?

We accept 30% down payment by T/T (Telegraphic Transfer), with the balance due before shipment. Other payment arrangements can be discussed for long-term partners.