TM 5-4610-218-12
Figure 2-15. Raw water flow indicator, installed.
the erdlator tank to the wet well is clear, close the
2-9. Starting Diatomite Filter.
dra in valve DV-25 (fig. 2-1).
a. General. It is necessary to fill the filter as in-
NOTE
dicated by the following instructions. Refer to para-
graph 2-7 for a description of filter operation.
The coagulated water in the wet well
tank will overflow to waste, through
b. Preliminary Valve Positioning. Refer to
the overflow pipe, until the filter sec-
tion is in operation.
tioning.
(9) Adjust the float arm of the float valve FV-
C. Preparation of Filter Aid.
18 (fig. 2-2) if the float valve does not completely
(1) The concentration of diatomaceous earth
close, when the water level in the wet well tank is
slurry for the initial charge is 1/2 pound per gallon
ten inches (25.4 cm) below the top of the tank.
of water, as shown on the calibration chart, figure
2-16.
Figure 2-16. Diatomite slurry calibration chart.
2-44
