Calibration Columns
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Neptune Calibration Columns provide a fast, easy and economical means of checking the flow rate of your chemical metering pump. The most accurate test of metering pump flow rate is to measure the drawdown rate on the suction side while leaving the discharge undisturbed in its normal steady state operating condition. Pump flow rate verification on a periodic basis or after maintenance is important to system accuracy. The Calibration Column can also be used to determine if check valves are worn or dirty. It is recommended to size the Calibration Column for a minimum of 30 seconds with a scale that will produce an easily readable differential within the test period. • Rugged PVC construction with slip on top caps for top filling and easy cleaning • Shielded glass models available for acids and strong chemicals • Calibration scales are protected from harsh chemical by Mylar lamination MODEL NUMBER

Installation Instructions Recommended Installation The recommended installation is shown below: 1. Install the Calibration Column in the suction line of the Chemical Feed Pump. The column should be installed in a vertical position. OVERFLOW PROTECTION LINE RESERVOIR CALIBRATION COLUMN 2. Two (2) Ball Valves are required and must be installed as shown in the adjacent drawing. Valves are not included. 3. The column should be installed so it will be filled regardless of the level of the tank. It is recommended that the top connection of the column be connected to a vent tube that is as high as...