Treatment of Chiller water for closed loop circuit. Closed circuit or closed loop water systems are a convenient way of heating or cooling building services applications and industrial and commercial processes. Our Chemicals removes Oil,Dirt, Welding Fluxes & other contaminants that tends to detoriate the treatment programme. It enhances the regular operations of other industrial sectors. Chiller water treatments are essential for most chiller plants where the pipes are made up of low carbon steel and normal water is used as the make-up water.