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A white and blue metal frame supports a cochrane multi media filtration system consisting of five elevated blue vessels and a series of pipes in various sized containing gauges and other omponents supporting the water filtration process

Multi-Media Filtration

Multi-Media Filtration is a robust, industrial quality system to remove total suspended solids (TSS), turbidity, and silt density index (SDI): dirt, sand, and sediment. Abrasive suspended solids can easily damage plumbing, valves and downstream equipment.   They will plug filters, foul reverse osmosis (RO) membranes, cause fouling and thermal efficiency loss, and harm boilers.

A white and blue metal frame supports a cochrane multi media filtration system consisting of five elevated blue vessels and a series of pipes in various sized containing gauges and other omponents supporting the water filtration process

Product Overview

For filtering turbidity from liquid streams before an activated carbon polishing phase, see the Newterra Activated Carbon Media Filtration Vessels.

Features

  • Vessels: Carbon steel, stainless steel or fiber-reinforced plastic (FRP), American Society of Mechanical Engineers (ASME) coded/stamped options
  • Design Pressure: As required
  • Internals: Stainless steel or schedule 80 PVC
  • Media: Anthracite, sand, garnet, fine gravel, coarse gravel
  • Face Plumbing: Carbon steel, stainless steel or schedule 80 PVC
  • Valve Operation: Pneumatic, water, electric or manual actuated
  • Skid Mounted Option: Carbon steel or stainless steelControls: Programmable logic controller (PLC), stager/timer, metered or manual

Benefits

  • Provides effective suspended solids filtration to 10 microns
  • Contains several layers of various density media providing finer filtration than traditional sand-only filters
  • Inlet/outlet pressure gauges
  • Efficient internal designs
  • Backwash flow control
  • Pressure release valve for pressure fluctuations
  • Safety vacuum release valve to prevent collapse
  • Stand-alone tanks or modular skid-mounted (pre-piped & pre-wired) options
  • Clear backwash drain line for visual inspection (polyvinyl chloride (PVC) plumbing only)
  • Steam sanitizable tank options (stainless steel vessel only)

Technical Specifications

Feed water enters the vessel through an inlet valve and is sprayed out over a mixed media bed. The water then flows down through the bed. The coarse media layers trap large particles, and successively smaller particles are trapped in the finer layers of media.

The result is a highly efficient filtering system since suspended solids removal takes place throughout the entire bed. The clean water enters the distributor system at the bottom of the vessel and travels upward via the center riser tube, which is then piped out of the vessel.

Over time the media will trap additional solids resulting in an increased pressure drop across the vessel. Once the pressure drop reaches a preset level, the control system (or manual initiation) will trigger a backwash mode. During backwash, the flow is reversed, and the feed water enters down through the riser tube, exits out the distributor system and flows upward through the bed of media. This increased velocity up through the bed disturbs the media and releases the trapped particles which are sent to a drain.

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