Taylor-Wharton VJ Bulk Tank - Manual (Page 7)

Instrumentation
LIQUID LEVEL GAUGE (LI-1) is a differential pressure gauge that indicates tank liquid level and is
calibrated for lbs/tons of CO2.
PRESSURE GAUGE (PI) is a 0-600 psi gauge with 4-1/2" face. It is mounted beside the liquid level
gauge.
INSTRUMENT EQUALIZATION VALVE (V-7) is used to equalize the pressure between the high
and low-pressure sides of the contents gauge.
LIQUID PHASE ISOLATION VALVE (V-6) isolates contents and pressure gauges from the tank
liquid (bottom) phase.
VAPOR PHASE ISOLATION VALVE (V-5) isolates contents and pressure gauges from the tank gas
(top) phase.
Safety Relief
OUTER JACKET LIFT PLATE (R-1) protects the tank vacuum jacket from overpressure.
SAFETY RELIEF VALVES (SV-1A, SV-1B) provide overpressure protection for the pressure
vessel. They will relieve excess tank pressure in the event that the maximum allowable working
pressure of the tank is exceeded. Once activated, the valve will close when the pressure falls below
350 psig (24 bar/2413 kPa).
SAFETY RELIEF VALVE SELECTOR (V-10) permits the operation of one safety valve while the
other is isolated. This arrangement prevents both valves from being isolated from the tank at the same
time and permits maintenance of a valve without the need to vent tank pressure. To activate one valve
while isolating the other move the selector valve handle all the way to the end of its travel toward the
valve to be activated
BACK PRESSURE REGULATOR (PCV) automatically closes on falling tank pressure and opens on
rising tank pressure to allow the tank to maintain a set pressure during periods of little or no usage.
This valve is factory set at 325 psig (22 bar/2241 kPa).
ISOLATION VALVE (V-8) must be opened to activate the Back Pressure Regulator (PCV-1).
Refrigeration
An internal refrigeration coil is supplied as standard equipment on the VJ-6 ton and VJ-14 ton tanks.
It has been sized to condense gaseous product produced by normal heat leakage into the tank. An
optional one-half horsepower refrigeration condenser unit is available for these two sizes (see
Appendix B).
The VJ-26, VJ-35, and VJ-50 ton tanks may be ordered with an optional internal refrigeration coil. It
is suitable for connection to a one horsepower refrigeration condenser unit.
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