MidiRO on the big screen

Oxfordshire based Optical Filters Ltd is the world leader in the design and manufacture of electromagnetic interference (EMI) screening systems for displays in military vehicles, tempest monitors and industrial equipment.

A reverse osmosis plant from ELGA Process Water proved a cost effective solution when Optical Filters experienced production problems with their optical screen meshes."The higher quality water produced by the system has enhanced our process and improved product rejection by about 70%", says Technical Sales Manager, David Payne.

The blackened copper mesh screens are manufactured to a high tolerance and the final water rinse is critical to product quality. In spite of softening the hard local mains water, the rinse left streaks on the surface of the mesh resulting in a lot of unusable product. ELGA Process Water recommended replacing the old water softener with an enhanced system, consisting of a selectron softener and carbon filter followed by a MidiRO™ 750 reverse osmosis unit. The water produced by the system is much higher quality than Optical Filters had previously used. Not only does it soften the water but the leading edge membranes in the MidiRO remove over 95% of the dissolved salts in the water along with any particulate material and even bacteria.

The MidiRO™ range consists of five free standing models, which produce from 90 to 800 l/h of permeate and are equipped with a 1µm prefilter and a control panel which gives a clear display of water conductivity, temperature and operational status and alarm logging facilities.

All models feature an automatic timed re-circulation rinse to avoid membrane fouling during inactive periods and automatic treated water diversion on start up until normal operating quality is reached. The controller can also output conductivity values to a PLC.

The MidiRO™ is supported by ELGA Process Water's comprehensive after sales service and the Hydrex® 4000 range of water treatment chemicals.

More information on the MidiRO^TM