Large sea water filters

This filter is specifically designed for the extremely corrosive environment of sea water and estuary water systems. The long lasting, money saving, reliable automatic filtration equipment that can be installed in modules to meet even the largest flow. Applications include large scale installations such as desalination plants, coastal power stations and cooling tower circuits but also smaller applications such as sea life centres and marine developments could use the same product on a smaller scale.   

The technology is based on a patented stainless steel “zero gravity” filter coil which is already in widespread use in many areas of industry including water and wastewater treatment and heating and air conditioning plant rooms.  A set of filter coils is fitted into a pod and each pod can be backwashed individually and automatically at a selectable differential pressure value.  The filtration process is not interrupted which ensures minimal effect on flow and the requirement for any redundant filtration capacity is eliminated.  Automation is PLC controlled and actuation is, in larger systems, pneumatic.    

The key to this latest project has been to identify materials that not just withstand the incredibly corrosive nature of sea water, but also the destructive action of erosion caused by silt heavy estuary water. Cross’s extensive research concluded that a filter coil made from alloy 625 combined with a large polypropylene housing, polyethylene pipework and bronze backwashing valves is the way forward for large scale sea water and estuary filtration systems. An all metal construction is also being designed for high pressure systems or where there may be higher temperatures.