Features :
SMACNA-Sheet Metal and Air conditioning Contractors National Association Inc - "HVAC Duct Construction Standards-Metal and Flexible" - 1995, U.S.A.Reading Guide - For duct sizes between, say, 651 mm and 700 mm, when the pressure class is 1 w.g. static, we require a ROLAMATE 'E' Class Flange and duct gauge of 26. For the same size range but with static pressure at 4 w.g. a ROLAMATE 'H' Class Flange with duct gauge of 24 should be used.Slip-and-Drive (C and S/ SS) cleats are generally used for class C connectors in most normal comfort costing applications.The ROLAMATE Flange classes available are designated E, H and J. For E H Class of ROLAMATE use gasket size 10 mm wide and 4.5 mm thick. For ROLAMATE J-Class use 15 mm wide and 6 mm thick gasket.For pressure class 6 w.g. static and above contact Rolastar to confirm the gasket type size requirement.For non-critical comfort cooling applications (1 w.g. pressure class), optional "C S" or "C SS" cleat joints can be used.Upto 450 mm duct size use "C S" cleats.451 to 750 mm duct size use "C SS" cleats.Over 750 mm duct size use ROLAMATE Flanges.Note: A higher-class flange can always be substituted for a lower class (e.g. class "J" for class "H", class "H" for class "E").ROLAMATE Flanges have been designed to meet the appropriate SMACNA-1995 Reinforcement Classes and tested successfully at Rolastar to meet the rigidity and leakage requirement in accordance with bothSMACNA testing norms and practices.Benchmarking with leading international 4-Bolt systems.All tests are carried out with ROLAMATE System Components. For further details on test procedures mail us at ho@rolastar.com. It is mandatory to use all ROLAMATE System Components specifically Rolastar supplied gasket to obtain the desired performance.All Components are Fully Galvanised to make itA formal training program for Contractors supervisors and technicians conducted at plants and job sites. (Click here for more on Site Contractor Training Program)Special purpose equipments and tools to facilitate Rolamate/ Duct Assemblies and erection. (Click here for more on Tools and Accessories.)Leakage Testing Service. (Click here for more on Air Duct Leakage Tester.)Other Aspects to benefit from Rolamate:Rust-freeAesthetically appealingUniform in appearance Key features of the components :
Flange DesignA double top rib to give a very high EI value to the flange (high strength - to - weight ratio).Recessed Grooves for:imparting greater strength to the flangesproviding a "seat" for the self adhesive gaskets (useful in the assembly and installation of flanges)A special "pocket" for the built-in sealant which runs the length of the flange and which fully envelopes the duct side wall edge when fully seated.A non-toxic, permanently semi-soft sealant (to avoid hardening and shrinkage at later stages).Corner DesignRaised contour in the corner piece to match the recessed groove of the flange, for achieving low leakage.Square hole to match the square neck carriage bolt which can be tightened using one hand only ( useful at heights)Holes to facilitate alignment of the duct assembly.Strong, stiff corners to avoid bending during transportation and storage.Flange Selection Criteria:(Recommended Configurations as per SMACNA*1 - 1995)ROLAMATE T Flanges are available in different sizes and identified by its Rigidity/Reinforcement "Class" as per SMACNA.