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Appendix B - Flow To Order An Oil/Water Separator Sensor (OWES) <br /> Sensor Sizing <br /> To determine the correct sensor length for the oil/water separator tank application use the manufacturer's tank chart to <br /> determine height-to-volume thresholds for warning and alarm conditions and make three measurements, including <br /> verifying fluid depths on the manufacturer's tank chart. <br /> 1. Determining The Lowest Point Of The Bottom (Alarm) Float <br /> Measure and record the distance from inside the top of the tank to the maximum depth of waste oil/water interface in <br /> the tank as recommended by the tank's manufacturer(see Fig.13-1). Subtract 3 inches from this measurement to <br /> determine the lowest permissible point in the tank for the centerline of the sensor's bottom (alarm)float and note <br /> this measurement as D1. <br /> - <br /> 3`(7.6em) <br /> Dl Minimum CL of the lowest point <br /> of Bottom(Alarm) <br /> ___ _- __. Float(down position) <br /> The tank manufacturer's <br /> recommended maximum <br /> Off./water interface depth <br /> Fig. B-1.- Determining Lowest Point For O/W Sensor's Bottom Float <br /> 2. Determining Distance From Top Of Riser To Top Of Tank <br /> Measure from the top of the riser down to the top of the tank and if using the riser reducing 4x2 fitting note this mea- <br /> surement as D2,OR, If using the riser reducing 4x2 coupling add 3"to the measured distance and note this mea- <br /> surement as D2. <br /> If using a 4"to 2" <br /> reducing fitting <br /> riser adapter <br /> T010 Of 0/1Wrise (example at right) <br /> to tap of;.cxnu <br /> no height adjust- <br /> 1 ment is needed to <br /> {i2 measurement D2. <br /> f ~ <br /> If using a 4"to 2" <br /> reducing coupling <br /> riser adapter 4 <br /> LJ (example at right) <br /> add 3 inches to <br /> 1 the results of ` <br /> measurement D2. <br /> Determining <br /> B-1 <br />