Spiral Tubeformer
Precision Engineering for HVAC
Preda Machine engineers and manufactures high-performance spiral duct machines and complete sheet metal fabrication solutions. Trusted by fabricators in 100+ countries.
Complete HVAC Duct Fabrication Solutions
From spiral tubeformers to fully automated duct lines — everything you need for round and rectangular duct manufacturing.
Featured Duct Machines
Our most popular machines, trusted by HVAC fabricators in over 100 countries.
Built for Performance, Trusted Worldwide
Factory Direct
Manufactured in our own facility in Maanshan, China. No middlemen, competitive pricing.
CE Certified
All machines meet CE safety standards. Quality control at every production stage.
Fast Delivery
Standard models ship in 15-25 days. Complete after-sales support and spare parts.
Expert Support
Engineers available for installation, training, and technical support worldwide.
Preda Care — Support That Never Expires
Buying a machine is easy. What happens when it needs service 3 years later? With Preda Care, you are covered for the entire lifecycle of your equipment — not just the warranty period.
Global Agent Network
Local service partners in 30+ countries. On-site support in your time zone and language.
Free Spare Parts
Wear parts shipped worldwide by express courier — free during warranty, factory cost after.
Remote PLC Diagnostics
Our engineers connect directly to your machine. Most software issues fixed within 2 hours.
24-Hour Response
WhatsApp, WeChat, or email — our technical team responds within 24 hours, 365 days a year.
Real Factories, Real Results
Hear from HVAC manufacturers who upgraded their production with Preda equipment
"Our family has been in HVAC manufacturing for 25 years. We ran on second-hand machines and manual labour for too long. In early 2024 we committed to a full rectangular duct line from Preda — the U5 auto line paired with a Pittsburgh lockformer, TDF flange machine, and corner installer.
Installation was smoother than expected. Their engineer walked our technicians through commissioning via video link, and we were producing finished duct on day three. The line now runs with two operators where we needed six before. Daily output went from 180 m² to 750 m², and the dimensional accuracy cut our on-site installation time by roughly 25%.
What truly sold us was the after-sales. Eight months in, a proximity switch failed on the U5. We emailed Friday afternoon, the replacement arrived Monday morning — free of charge. Their technician connected to our PLC via remote desktop and confirmed the replacement procedure in under an hour. We never got that kind of support from the European brand we used before."
"Our factory specialises in spiral duct and fittings for the Norwegian and Swedish HVAC market. We were running an old spiral machine and hand-forming every elbow — it was the bottleneck of the whole operation. At the end of 2023 we installed the Preda S5 spiral tubeformer with the hydraulic gorelocker.
The S5 runs 16 hours a day, handling diameters from 100 mm up to 1600 mm. The seam consistency is noticeably better than our old machine. But the game-changer is the gorelocker: one fabricator used to top out at 20 elbows a day. Now the machine produces one every three minutes — over 120 per shift — and the angles are accurate enough that fitters on site stop asking for adjustments.
When we switched to stainless steel spiral, we struggled with the feed pressure. We messaged Preda at midnight our time — seven hours ahead of them. Their engineer was online by 6 a.m. China time, remotely connected to our control system, and adjusted the forming parameters within 20 minutes. We've only replaced one cutting blade so far, shipped free. We calculated payback at 11 months."
Download Our Latest Brochures
Complete product catalogs with detailed specifications, configurations and technical parameters. View online or download PDF.
Round Duct Machines
30 machines · 32 pages
Spiral tubeformers, ovalizers, gorelockers, welders, beading machines & round duct equipment.
Square Duct Machines
28 machines · 30 pages
Pittsburgh lockformers, TDF/TDC flange formers, folding machines, shears & seam lockers.
Auto Duct Lines
7 lines · 9 pages
From Cut-to-Length to Super Auto Duct Line 5 — complete rectangular duct automation.
