Sheet Metal Duct Fabrication Machinery. Ductformer manufactures Sheet Metal Machinery for Duct Fabrication including Sheet Metal Forming Machines, Rollformers for TDFC Duct Flange Connectors (C style and F style), Slip & Drive, Cleat Formers, Pittsburgh / Snap Lock seaming, Automated Rollforming Lines, Sheet Metal Bending & Folding Machines, Edge Rollers, Sheet Metal Toggle Lock & Clinching,ductfab – "Trusted Solutions for Duct Fabrication",DUCTFAB EQUIPMENTS PVT. LTD. [Formerly W. Neal Services (India) Pvt. Ltd] was established in 1999. The Company has been making its mark on the Heating, Ventilation and Air Conditioning (HVAC) sector as the leading supplier of Rollformers, Coil lines and other duct forming machines.HVAC DUCT FABRICATION | Chennai | KR Industries,KR Industries owned by Mr.K.Ramalingajothy, started at year 1983 in the name of 'SRIRAM ENGINEERING WORKS' as small workshop with 3 employees, is now a leading HVAC DUCTs production company in Chennai with 30 employees and 10 automatic machines. We design and produce a myriad of HVAC ducts, connectors, doors, sealants and support systems.