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 water source to a filler/discharge assembly.
Manually operated gate valves are used to limit the flow of water. Water
is discharged by connecting a line to the filler/discharge assembly.
Water can also be supplied at a reduced flow by using the 3/4-inch drain
line.
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 sub-
ject to internal vapor pressure greater than 3 inches (7.62 centi-
meters) of water.
b.
Drain Gate Valve.
The drain gate valve allows water 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 water to flow into or out of the tank.
When closed, it blocks water flow.
3-1
