Coolant Filtration

Coolant Filtration

Coolant is required in most industrial, commercial and even residential motorized products, especially in the automotive sector, where it regulates engine temperature. In each of these applications operation and manufacturing often result in the production of airborne pollutants such as oil mists, metallic dust, smoke, particulates and vapors that may impede the performance of coolant. Environmental contaminants such as dirt, dust and water vapor are also commonly encountered by coolant apparatus and can be equally damaging. It is important to use a specially designed liquid filter to clarify and purify coolant for optimal operation, especially when using coolants designed to last for several years. If left unfiltered, long-range coolants can accumulate a great deal of suspended debris leading to significantly reduced productivity and functionality. Filters simply run the coolant chemical compounds through one or more filter media, woven or non-woven fibrous materials or membranes that allow the fluid to pass while trapping impurities.

Before selecting the proper coolant filtration system it is important to know the type and chemical composition of a specific coolant. Coolants combine antifreeze and corrosion inhibitors with water and organic chemicals such as ethylene glycol, propylene glycol and diethylene glycol in varying amounts to create three basic types of coolant. North American green antifreeze, OAT based extended life coolant and hybrid OAT or G-05 as well as newer, environmentally-friendly coolants are widely available and in need of filtration. Filters are available in three product configurations. Filter media, the chemical or fibrous barrier that traps the pollutants, can be purchased separately and in bulk as can housing apparatus made of corrosion resistant materials, such as stainless steel, aluminum and PVC. Complete assemblies are also available that contain both the media and the housing that keeps it in place. While a single filter is sufficient for low use applications, it is not uncommon to employ more complex systems where coolant is in high use and at risk of contamination. These systems offer modular designs and are multi-stage with larger particulates being removed first by more porous filters and smaller contaminants being removed by progressively finer meshes and membranes. It is important to consider the flow rate range, filtration level, size, absorption, ply, operating temperature, load capacity and the efficiency or accuracy of a coolant filtration system as compared to the needs of the specific application for which it is needed.