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The advantages of corrugated parallel plates have been known for decades thanks to initial research in the 1960's by Royal Dutch Shell Oil Company and Pielkenrod-Vinitex of the Netherlands. The main difference between McTighe and other companies that use corrugated plates is that we use a combination of separation technologies and provide a plate arrangement that is not only high performance, but is also maintenance friendly. The McTighe Industries rectangular separator incorporates an inclined arrangement of corrugated plates stacked upwards at a 30° angle in the direction of flow spaced an equal distance apart to prevent buildup and possible plugging problems. The McTighe Corrugated Parallel Plate arrangement greatly reduces the distance an oil droplet has to rise for effective removal. Also, the sinusoidal flow path created by the plates creates oil droplet collisions resulting in increased oil droplet size. Under laminar flow conditions, buoyancy forces cause the oil droplets to rise and coalesce into sheets of oil on the underside of the plates where they creep up the surface and eventually break loose in the forth of large oil globules. The rest of the separation chamber allows the oil globules to rapidly rise to the surface creating an oil layer. 3. Separation Chamber In the McTighe separator, the separation chamber is designed to provide adequate volume for the coalesced oil droplets to reach the surface for effective separation. The separation chamber size increases in relation to the increasing wastewater volume requiring treatment. 4. McTighe Petro PakTM Coalescer on PCO Models Only The McTighe Petro Pakrm is designed to remove small oil droplets down to 20 microns in size that do not have sufficient buoyancy to reach the surface of the separator before entering the discharge region. The Petro PakT"coalescer in the McTighe separator is placed as far away from the corrugated plates as possible. This prevents the coalescer from experiencing a high oil loading from oil droplets that are large enough to separate before reaching the Petro PakTM. See our Petro PakTM description sheet for more information. NOTE: The CO models include steel channels and an access cover for the possible addition of our Petro PakTm coalescer in the future. 5. Outlet Chamber The discharge pipe opening is located at the furthest point distant from the inlet at the most quiescent zone of the separator. The invert of the outlet pipe establishes the static surface level of the separator. The outlet pipe is designed to conform to the flow capacity of the separator. These are the standard operations of McTighe's rectangular units. Separators may be specifically modified to meet special applications. See Special Configurations for additional separator layouts. McTighe Industries Oil-Water Separators are engineered and sized for specific rates of flow. Influent flow rates in excess of the units stated maximum gallons per minute flow rate will result in decreased separator efficiency. Also,each McTighe separator is designed and built to separate a particular type of Section 3.A—Rev 6/02—2/2