GDF Dual-Spec Duct Flange Forming Machine for HVAC Ventilation Industry Manufacturing
30
+
Years of Experiences
clients worldwide
certification
lidingVideo
lidingTechnical Specifications
| GDF Dual-sizes Forming Machine | Basic Model |
| Brand Name | Liding / Customized |
| Model Number | GDF-20/30 Dual-Spec |
| Flange height | GDF-20: 20 mm / GDF-30: 30 mm |
| Motor | K77 Gearbox ,8kw |
| Applicable Pipe Material | GI Steel Sheet |
| Standard Material Thickness | 0.6-0.8mm for GDF20 / 0.8-1.0mm for GDF30 |
| Rated Voltage | 380V 50Hz 3 Phases or as request |
| Forming Station | 24 stations on each side (independently configured on both sides) |
| Driving System | Gear + Chain Combined Drive |
| Roller Material | Cr12mov / Gcr15，quenched HRC60-62° |
| Control system | Conventional electrical control (no PLC) |
| Forming Speed | 10m/min |
| Equipment Net Weight | 2700kgs |
| Overall Dimension (LWH) | 5600*1000*1400mm |
| PLC Brand | Imported brand |
| Warranty Period | 1 Year |
| Outgoing Inspection | Video outgoing-inspection & Machinery Test Report Provided |
| Certification | CE ISO |
| Standard Delivery Time | 2 months |
lidingWhy do professionals choose LIDING flange machines?
Foshan Liding Machinery Equipment Co., Ltd. was established in 2014, with its core team possessing over 25 years of practical experience in the field of cold-formed profiling. From HVAC ductwork equipment to production lines for cold-formed steel sections used in building structures, Liding has supplied over 2,000 sets of equipment to customers in more than 50 countries worldwide. The GDF Dual-Spec dual-specification flange forming machine is the culmination of Liding’s long-term expertise in the field of GDF profile duct flange forming.GDF profile ducts are widely used in HVAC projects, where traditional riveted sealing processes are employed—flange joints must be flat, accurately angled and free from distortion. However, with GDF duct orders, flange specifications can change at any time; it might be GDF20 today and GDF30 next week. Purchasing a dedicated machine for each specification results in an excessively long return on investment cycle.
The Liding GDF Dual-Spec has been designed precisely for this purpose. A single machine handles two GDF flange specifications, sharing the same frame whilst operating on separate tracks. On the left is the GDF20 (0.6–0.8 mm, flange height 20 mm); on the right is the GDF30 (0.8–1.0 mm, flange height 30 mm). Two sets of 24 precision rollers are independently configured, sharing the frame, side panels and motors. Switching between specifications requires only a change of feed side; there is no need to dismantle or reassemble dies.
Liding has specialised in cold-forming for over 25 years, and this machine is the mature, practical application of its GDF profile flange forming technology.
24-station roller set specifically designed for GDF, with flanges and sheet metal formed as a single unit
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This equipment features 24 sets of rollers specifically designed to suit the cross-sectional characteristics of GDF profiles, with each set precisely positioned according to the GDF forming path. Unlike TDC flanging machines, which require flange strips to be formed separately and then riveted by hand, this machine continuously roll-forms GDF flange joints directly onto the edges of the sheet metal. The finished product emerges with fully riveted flanges, eliminating the need for secondary processing. The flange joints are flat and fit seamlessly with the corner brackets. The roller arrangement data accumulated by Liding in the field of GDF profile forming has been validated through actual production on over 2,000 machines worldwide.
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One machine, two specifications; change specifications without change
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GDF20 (0.6–0.8 mm) on the left and GDF30 (0.8–1.0 mm) on the right: the two sets of rollers are independently configured, sharing the same frame and motor. Switching between specifications requires only changing the feed side; there is no need to dismantle or reassemble the rollers. Compared to purchasing two separate machines, this solution reduces capital expenditure by 40 per cent, halves the floor space required and cuts maintenance requirements in half. The Liding team has specialised in cold-forming for 25 years, and this ‘shared frame, independent rollers’ design has been operating stably over the long term in customer factories across multiple countries.
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Function-oriented design, without unnecessary features
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The operational context of this equipment means that a PLC is not a necessary component. There is no requirement for flying shears, no servo-driven width adjustment, and no automatic memory for multiple specifications—sheets enter the equipment, undergo continuous roll forming, and are discharged directly, operating at a single, constant speed throughout. Consequently, traditional electrical control fully meets production requirements, aligning with the equipment’s process specifications whilst reducing the customer’s reliance on external PLC programmers. When the equipment is exported overseas, routine maintenance can be carried out by local electricians.
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A stable structural design ensures precision in mass production.
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Both the side panels and the spindle have a diameter of 35mm, and the machine has a net weight of approximately 2,700kg. During continuous operation, the relative positions of the roller stations remain stable and do not shift due to prolonged stress—ensuring consistency in flange dimensions during mass production and significantly reducing the scrap rate. Liding’s core team has over 30 years’ industry experience; all equipment undergoes comprehensive testing prior to dispatch, and the entire product range is CE-certified. A 12-month warranty is provided, along with a 48-hour global technical response service; engineers can be dispatched overseas for on-site support.
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Standard Production Process
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Galvanized Steel Coil Loading → Automatic Feeding Feeding → levelling → Beading → Angle punching (square) → Shearing → Entering the GDF flange forming → bending.
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lindingAfter-sales Service
This GDF20/30 flange roll forming machine is the essential core equipment for HVAC ventilation and fire protection engineering
Warranty
● A standard 12-month warranty covers the replacement of spare parts required due to manufacturing defects or normal wear and tear during the warranty period.
Lifetime Technical Consultation
● We provide free technical consultation for the lifetime of the equipment. Customers can obtain technical support online for any issues relating to equipment operation, maintenance or fault diagnosis encountered during the production process.
On-site Service (Chargeable)
● We can dispatch engineers to your factory site according to project requirements to provide services such as equipment installation guidance, commissioning, operational training and instruction on key aspects of routine maintenance.
Spare Parts Kit
● Each unit is supplied with a kit of commonly used wear-and-tear parts. If additional spare parts are required, please notify us in advance so that we can include them in the same consignment, thereby saving on subsequent transport costs.