Compressed Air Systems should be designed for just the right quality of air at the most economical costs. We have a wide range of dryers for all your needs, for general plant and instrumentation air. Desiccant Dryers, heatless type, use 10 to 15% purge air for regeneration of desiccant i.e. 10 to 15% of compressor power (HP) is being used as energy operating costs for drying thereby increasing the capital costs in installing extra capacity of compressor. They contain two pressure vessels or towers, each containing a quantity of desiccant. One tower dries the air, while the other is being reactivated. The 'heatless' principle of regeneration is based on the physical property of the desiccant, which liberates the adsorbed water vapour, if air with a low water vapour pressure is passed through it.