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."
"I really liked the PREDA equipment because the equipment works very accurately and is of high quality, a big thank you to the PREDA company and Mr. Jason for this."
"Thank you so much. The beading machine is a beast. It's saving so much time in the factory."
"We got your machines and we are very satisfied with them."
Real customer feedback — collected from direct emails and social media posts.
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.
Duct Machine Buying Guides & Technical References
Written by the engineers who build these machines. Specification comparisons, selection rules and real price bands — no fluff, no gated PDFs.
Spiral Duct Machine Buying Guide
How to match tubeformer diameter range, gauge capacity and mould type to your actual order mix.
Read the guide → Buying GuideAuto Duct Line Buying Guide 2026
Line 2 through Line 5 compared on labour saved, floor space and payback period.
Read the guide → ComparisonTDF vs TDC Flange Guide
The two dominant rectangular duct flange systems compared on sealing, speed and installed cost.
Read the guide → Buying GuidePittsburgh Lockformer Buying Guide 2026
SA-15HB vs SA-12HB vs snaplock vs S&drive: which lock profile and machine fits your duct class.
Read the guide → PricingHVAC Duct Machine Cost: 2026 Price Guide
Realistic price bands for every machine category, plus financing and total-cost-of-ownership maths.
Read the guide → SetupHVAC Duct Factory Setup Guide
The complete equipment list for a new duct factory, from coil handling to finished fittings.
Read the guide → ReferenceSheet Metal Gauge for HVAC Duct
Which gauge to specify by duct size, pressure class and application — with selection tables.
Read the guide → ComparisonSpiral vs Rectangular Duct
Which profile wins on material cost, pressure drop and installation labour — with decision rules.
Read the guide →Real Factory. Real Machines. Real Deliveries.
We own our manufacturing facility in Maanshan, China — with overhead cranes, forklifts, and a dedicated loading bay. Every machine is professionally packaged, loaded into containers, and secured for safe ocean transport to your port.
Every shipment includes: professional wooden crating, stretch wrapping, container reinforcement, and detailed loading photos sent to you before the ship sails.
Request a Shipping Quote →Meet Us at the World's Largest Trade Fair
Every year, Preda Machine showcases our latest HVAC duct machinery at the Canton Fair in Guangzhou — connecting with customers from over 80 countries. As a government-audited and certified manufacturer, we qualify for our own official booth under the Preda Machine name — not a shared booth, not through a trading company. Here are some highlights from our latest exhibition.
Visit us at the next Canton Fair — see our machines running live, meet our engineers, and discuss your duct production needs face to face.
Request an Invitation →