Owner's manual

TW-407 Rev.-

Instrumentation Circuits



The pressure gauge (PI-1) displays the inner vessel pressure in pounds-per-square-inch and kilo pascals.



vessel. Product within the vessel creates a higher pressure at the bottom of the vessel than at the top.

Readings on the liquid level gauge are in inches of water. This reading, when compared to the contents

chart attached to the front of the vessel, allows accurate monitoring of the amount of product within

the vessel.

Isolation valves (V-8 and V-10) allow maintenance of the circuit without emptying and depressurizing

the vessel. The equalization valve (V-9) must be opened before the isolation valves are closed. Two

¼” female pipe thread connections (CN-5 and CN-6) are provided to allow easy connection of telem-



plugged.

Figure 7: Instrumentation circuits highlighted

LI2

Pl-1

V10

V8

CN5

CN6

V9

LI1