What type of media is commonly used in pressure filters?

Pressure filters commonly utilize sand or mixed media as the filtration medium due to their effectiveness in removing particulate matter from water. Sand is a widely recognized choice because of its availability, cost-effectiveness, and ability to trap particles through both depth filtration and surface straining. Mixed media filters can combine sand with other materials such as anthracite or garnet, which enhance the filtration process by providing a varied density and size of particles, allowing for improved flow rates and a greater surface area for trapping contaminants.

The use of sand or mixed media in pressure filters is particularly advantageous in applications where the particle size and turbidity of water vary, offering a more versatile filtration solution. This media type also supports backwashing procedures, allowing for the cleaning and regeneration of the filter without the need for replacement, making it practical for ongoing water treatment processes.