Emissions of isocyanate fumes from storage tanks must also be controlled. These emissions are normally produced either in tank venting due to tank pressurisation or during filling or emptying of the tanks. The company provides a range of tank fume scrubbing units for this purpose. Opus says that it also supplies units with special particulate filters to reduce the emissions during flame lamination of PU foam to acceptable limits. The company has put together a service package providing the manufacturing drawings and specifications of the main adsorber tank and activated carbon to be purchased locally. This reduces both the price of the equipment and the shipping costs. Opus provides inlet filter, main extraction fan, and control system. The company also assists during installation and start-up. The activated carbon adsorption can remove up to 100 % TDI emissions from the foaming process, is easy to operate, with minimum maintenance (for example recharging the carbon over five yearly intervals). It can easily be installed into the existing foam line without interrupting normal foam production. Opus Technical Ltd, based in Macclesfield, Cheshire, UK, supplies equipment and technology for the polyurethane foam industry. The directors and engineers have over 40 years of experience in the design, manufacture and installation of over 500 flexible and rigid foam machines which have been supplied worldwide to foam companies. Two of the world's largest foam companies have installed Opus activated carbon equipment in several of their foam plants in Europe and the USA. The Opus equipment range includes conventional, Maxfoam, Vertifoam, Ultima and variable pressure foaming VPF as well as rigid foam laminators and slabstock machines, flat topping systems, bulk tank farm equipment, and liquid carbon dioxide systems and environmental control systems.