Door panels are constructed from 0.5mm gauge Galvanised Steel with the door frame made from 0.9mm gauge Galvanised Steel. Each door is insulated with High density (45kg/m3) glass wool conforming to test GB/T13350-2008 with a class A fire resistance. Thermal conductivity is: 25oc – 0.035 & 75oc – 0.044, tested according to GB/T10294-2008. Internal gasket is of a closed cell high density cross-linked polythene foam.
The range of six sizes have been carefully selected to provide suitably sized apertures relative to the size of ducting required. Our curved doors are suitable for spiral and straight seamed ducts with a size range of 100mm to 2000mm Ø. Every door is supplied complete with a self-adhesive cutting template which eliminates the need for any measuring or marking out.