Water Softeners & Filters » Backwash Filters

SurSoft is a Washington based company that produces reliably built and engineered water softeners, deionizers and filters for commercial and industrial use. We serve our clients through a network of highly qualified distributors throughout the United States. Our distributors sell full SurSoft systems as well as parts and equipment. SurSoft also offers something more important than technology alone, we provide unrivaled service for the filters, deionizers and water softeners that end users need to treat process water and protect the pipes, valves, and systems that transport the water.

Acid Neutralizer Filter

A crushed and screened marble material (95% calcium carbonate) slowly dissolves in the neutralization of acidic water. Being granular, the "AN" media also reduces turbidity and oxidized iron. Because the media adds hardness to the water as it dissolves, it is usually installed ahead of a water softener.

Activated Carbon Filter

Activated carbon filters are widely used to remove both chlorine and organics from water. Removal of chlorine improves the taste and odor of drinking water and prolongs the life of water service equipment that is affected by the oxidizing properties of chlorine. Removal of organics will also improve the taste and odor of drinking water. Organics in water include a wide variety of substances including pesticides, herbicides and industrial solvents for which activated carbon has diverse capacity.

Iron Oxidizing Filter

Iron filters have the unique ability to remove both the soluble (colorless) and insoluble (red color) iron from water. These filters are used when hardness is low or where removal of iron by ion exchange (water softening) is not practical. Under special conditions manganese and hydrogen sulfide are also removed by the iron filter.

Multi-Layered Filter

Multi-layered filters have a unique filtering ability due to the reverse grading of the media. With the coarsest layer at the top of the bed and the finest layer on the bottom, the filter is able to retain finer particles, operate at higher flow rates and be loaded more than other types of sediment filters. It is used for the heavier filtration jobs such as cooling tower recirculation water or surface lake or stream water. Multi-layer filters provide excellent protection ahead of water softeners or reverse osmosis systems to remove turbidity, sediment and oxidized iron.

Sand Filter

Even though the newer types of filter media operate at higher flow and have longer on line time between backwashes, sand filters remain an industry standard for removing dense turbidity and sediment. Removing sand from water is best accomplished with sand filter medial. A filter media lighter in weight allows the collected sand to merely move deeper in the filter media during backwash.

When backwashed, the sand media stratifies so that the finer media is at the top of the bed with the coarsest media at the bottom. The particulate matter from the water collects on top of the bed. Since the coarser media below the top layer can be thought of as merely the supporting structure, the top media is the only real filtration area. As sediment collects on top of the bed, the pressure drop increases. When pressure drop builds to 12 psig over the clean bed pressure drop, the filter is backwashed, flushed and returned to service.

A clean sand filter is capable of removing particles as small as 40 microns in diameter. As the sediment collects on top of the media the particle retention increases. The retention is greatest just before the filter requires backwashing. Because the collected sediment is concentrated on the top of bed, sustained high flow rates are not recommended due to the compaction and channeling conditions that result.

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