Defoamer

Approx. Rs 140 / KilogramGet Latest Price

Product Details:

Foam formation requires the presence of a surface active agent (surfactant) to reduce surface tension at the air-water interface.  It also requires the input of mechanical energy to mix air into the water.  In natural environments this mechanical mixing energy might result from wave action, wind action, currents or a waterfall. Cooling towers are, by design and operation, susceptible to foaming.  The water is treated with a variety of organic chemicals, some of which have surface active properties.  The tower draws in a continuous flow of air, bringing with it a variety of particulate and vapor contaminants from the surrounding environment.  Heat exchanger piping leaks can allow contamination of the cooling water with process fluids which may include surfactant-type chemicals and/or may promote bacterial and algal growth.

Approx. Rs 110 / UnitGet Latest Price

Product Details:

A defoamer or an anti-foaming agent is a chemical additive that reduces and hinders the formation of foam in process liquids. The terms anti-foam agent and defoamer are often used interchangeably. Commonly used agents are insoluble oils, polydimethylsiloxanes and other silicones, certain alcohols, stearates and glycols. The additive is used to prevent formation of foam or is added to break a foam already formed. In industrial processes, foams pose serious problems. They cause defects on surface coatings and prevent the efficient filling of containers. A variety of chemical formulae are available to prevent formation of foams. Generally a defoamer is insoluble in the foaming medium and has surface active properties. An essential feature of a defoamer product is a low viscosity and a facility to spread rapidly on foamy surfaces. It has affinity to the air-liquid surface where it destabilizes the foam lamellas. This causes rupture of the air bubbles and breakdown of surface foam. Entrained air bubbles are agglomerated, and the larger bubbles rise to the surface of the bulk liquid more quickly.