How do sand or mixed media pressure filters operate compared to gravity filters?

Sand or mixed media pressure filters operate by feeding water under pressure, which is essential for their function. In these types of filters, water is forced through the filter media by a pump, allowing for effective removal of particulates and turbidity from the water. The pressure helps maintain the flow rate through the media, making pressure filters more compact and efficient compared to gravity filters, which rely on the force of gravity to move water through the media.

The use of pressure enables a higher rate of filtration and can accommodate a higher loading of suspended solids without the need for frequent backwashing compared to gravity filters. This mechanism leads to improved performance in various applications, particularly in situations where space is limited or higher flow rates are required. Pressure filters also tend to have a smaller footprint than gravity filters, making them easier to integrate into existing systems or in areas where space is at a premium.

Thus, the ability to feed water under pressure is crucial for the effective operation of sand or mixed media pressure filters, distinguishing them from gravity filters which do not utilize pressure in the same manner.