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Filtration Vessels Media Carbon Multimedia

Cochrane FILTEREX Multi Media Filtration

The COCHRANE®  FILTEREX Multi-Media Filter is a robust, industrial quality system that can be provided in multiple sizes and configurations.

Feed water enters the vessel through an inlet valve and is sprayed out over the bed of mixed media. 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 where it 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.


• To remove suspended solids (TSS, turbidity, SDI): Dirt, sand, and sediment
• Suspended solids are abrasive and can easily damage plumbing, valves and downstream equipment
• Suspended solids will plug filters and foul RO membranes
• Suspended solids are harmful to boilers and can cause fouling and thermal efficiency loss

Key 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 (PVC plumbing only)
• Steam sanitizable tank options (stainless steel vessel only)


Vessels: Carbon steel, stainless steel or FRP (fiber reinforced plastic), 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 steel
Controls: PLC, stager/timer, metered or manual

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