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AFL INDUSTRIES <br /> RIVIERA BEACH,FLORIDA <br /> SERVICE OPERATION& MAINTENANCE PAGE 1 OF 1 <br /> MANUAL INSTRUCTIONS <br /> PRODUCT: ROTARY PIPE SKIMMERS <br /> ALL MODELS <br /> DESIGN <br /> The AFL Rotary Pipe Skimmer(RPS)is designed to remove products such as oil,animal fats and floc from API-type separators, <br /> clarifiers or skim tanks. This style is ideal for a heavy or viscous product,and the best operation is achieved when the specific <br /> gravity difference between liquid and material to be skimmed is great. <br /> Constructed entirely of corrosion-proof materials(see equipment specifications for type of construction and materials furnished), <br /> the RPS can operate in a wide variety of environments with minimal maintenance. <br /> MANUAL OPERATION <br /> The operation of the RPS requires periodic checks of the product level in the tank. The operator decides how much of the product <br /> he wants to collect before skimming. When the product level is sufficiently thick to operate the skimmer,the skimmer is rotated <br /> about its axis and the skimming edge lowered into the product. As the product spills into the skimmer,it flows by gravity out of <br /> the skim pipe,through the wall of the separator,and into a product storage tank for accumulation and subsequent removal. The <br /> operator must maintain a watch on the product being skimmed. When water appears to be entering the skimming pipe, the <br /> skimmer must be rotated to an upright or non-skim position. Automatic skimming is possible,but requires a continuously thick <br /> product level as described below. <br /> AUTOMATIC SKIMMING-UNATTENDED OPERATION <br /> Automatic operation is recommended only on applications where the specific gravity of oil and/or material to be skimmed is <br /> known,will not change during operation,and the flow through the unit will remain constant. <br /> To adjust the Rotary Pipe Skimmer for automatic operation,the skimming edge of the skimmer pipe should be set 1/4"above the <br /> maximum water level (at design flow). See Separator Operating Instructions in this brochure for procedures to calculate the <br /> maximum liquid level. <br /> With this setting,the skimming operation will be continuous the moment the oil layer floating on the surface is greater than 1/4" <br /> thick. <br /> MAINTENANCE <br /> 1. Periodically check the skimmer assembly and make sure the skimmer level and attitude have not changed. <br /> 2. Check scum and grease accumulation in the pipe and outlet connection weekly and scrape or hose the assembly when <br /> required. <br /> SUPERSEDES: I-O-M: 7.11 <br />