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Doby System

Our Doby slip on duct flange system with an integral pocket of permanently flexible non toxic sealant, provides the rapid assembly of crossed ducting joints. The Doby Flanges and Corners System are available in standard Euro sizes of 20mm, 30mm and 40mm and fully conforms to UK, HVCA Specification DW144. The Doby slip on duct flanges and corners are tested and certified by BSRIA in accordance with the HVCA test procedures DW/TM1. The ducting joint product is also tested in accordance with USA requirements of SMACNA. Doby duct flanges and corners are suitable for HVCA specification ducting joint ratings up to J6 and pressure classes A, B and C.

For all your slip on duct joints we can supply a full range of flange accessories to suit all sizes of duct flanges including corners, clamps and ‘Ductseal’ gaskets, online shop - Doby Flange System.

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