Replacing O-Rings - Movement of the spiral wound reverse osmosis membrane elements within their pressure vessel can commonly cause abrasion and failure of the O-Rings that seal the inter-connector to the element permeate tube.

A sudden increase in permeate conductivity, not accompanied with a noticeable increase in permeate flow rate could indicate a broken or missing O-Ring. Profiling and then probing to determine if only individual pressure vessels/membrane elements are causing the increased conductivity will indicate if O-Ring damage is the problem.

To replace the O-Ring, the reverse osmosis system should be shut down and allowed to drain by opening the sample valves. The end-cap should then be removed. Usually O-Ring damage is visible. The O-Ring is replaced by hand, wetting with lubricant (glycerin – use sparingly) if necessary.

Technical support and advice

Reverse Osmosis Chemicals International work closely with a diverse range of global organisations, intelligently combining advanced treatment technologies with practical solutions to resolve complex issues. If you have a project you would like to discuss, or you require technical support and assistance; or if you simply have a question about our reverse osmosis technology solutions please contact one of our specialist advisors using our Technical Support page or call us on +44 (0) 330 223 31 31.