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Calibration Cylinders Operation: Griffco calibration cylinders are installed in the suction line to the chemical metering pump. Two isolating valves, (not supplied) must be install in the suction line as per the drawing below. The top of the cylinder should be vented back to the storage tank or to drain. Fill the cylinder to the top mark then close the valve from the chemical tank. Switch on the chemical feed pump and draw down the chemical in the cylinder for 30 seconds. Switch the pump off. The reading on the left side of the cylinder is a direct readout of USgph. Alternatively, observe the volume withdrawn on the ml scale. To convert to LPH or GPH use this formula:
LPH = (volume÷draw time) x 3.6
Typical Installation
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