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Filtration - Gravity

Gravity Filtration Gravity Filtration

Filtration is a mechanical or physical process for the separation of solids from liquids; separating particles in the feed from the resulting filtrate. Filtration can be accomplished by a number of methods and is differentiated from screening which is an open channel process.

Media Filters

Ovivo supplies a large range of  filtration products, components and systems tailored for the industry and application that they serve. All Ovivo filters and filtration products are designed to give operational advantages and are characterised by high performance, excellent reliability and long life.

Gravity Filter Components

Used for filtering potable water the underdrain is the heart of every media filter. If the underdrain is well designed, durable and efficient, the filter will provide many years of continuous service. If not, the underdrain and perhaps the entire filter may need replacement after only a few years’ use.

Underdrain types:

  • Cast-in-Place with nozzles
  • Stainless Steel Low Profile
  • Air Scour Systems

Our underdrain solutions are available in a variety of feed and drainage arrangements, depending on the existing basin layout and piping. All distribution orifices are specifically sized to suit the application and to ensure equal flow distribution. Rapid-fit, cast-in-place underdrain systems can offers substantial savings over other methods of granular media filter construction, as well as cutting installation times and reducing maintenance costs whilst improving media scour. Systems for sequential and simultaneous air and water backwash are available and are low profile to permit retrofitting and increased media depth.

Scourguard™ backwash troughs allow granular media filters to be cleaned by both air scour and water backwash simultaneously, with minimal media loss in the backwash waste. Backwash troughs offer real operating economies through reductions in backwash water production and lower energy consumption of air blowers and backwash pumps.