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CHAPTER 3. OPERATING INSTRUCTIONS
Section I. INTRODUCTION
3-1.
GENERAL THEORY OF OPERATION. The tank is filled by connecting a line from a shipping tanker or other
fuel source to a filler/discharge assembly. Manually operated gate valves are used to limit the flow of the fuels.
Fuel is discharged by connecting a line to the filler/discharge assembly. Condensation and residual fuel are
drained using the two drain assemblies on the bottom of the tank. The fuels are hazardous. Follow all safety
procedures carefully when operating the tank.
3-2.
CONTROLS AND INSTRUMENTS.
a.
Vent Assembly. The vent assembly is located in the middle of the tank. It contains a relief valve which
opens when the tank is subject to internal vapor pressure greater than 3 inches (7.62 centimeters) of water.
b.
Drain Gate Valve. The drain gate valves allow residual fuel or condensation to be drained from the tank
when necessary.
c.
Filler/Discharge Gate Valve. The filler/discharge gate valve is in- stalled on the line attached to the
filler/discharge elbow selected for use. When open, it allows fuel to flow into or out of the tank. When
closed, it blocks fuel flow.
3-1
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