Table 10-1.--LOX Servicing Trailer Controls and Indicators--Continued
Code
Component Name
Description of Function
LG-1 Storage Tank Liquid Level Gauge
Indicates the liquid level in the inner tank when the tank is
situated on level ground. The dial is magnetically and
mechanically coupled to a float sensor inside the storage tank, and
is calibrated in gallons.
P-1
Storage Tank Pressure Gauge
Indicates the pressure in the inner tank.
RV-1 Storage Tank Inner Shell Relief
Provides protection from excessive pressure in the storage tank.
Valve
SD-1 Storage Tank Inner Shell Rupture
Provides an additional level of protection from excessive pressure
Disc
in the storage tank.
LV-2 Transfer Tank Fill Line Shutoff
Controls the gravity-fed flow of liquid oxygen from the storage
Valve
tank to the transfer tank.
GV-3 Transfer Tank Vent Line Shutoff
Controls the flow of oxygen gas vapors from the transfer tank to
Valve
the vapor space of the storage tank.
P-2
Transfer Tank Pressure Gauge
Indicates the pressure in the transfer tank.
LG-2 Transfer Tank Liquid Level Gauge
Indicates the fluid level in the transfer tank. The gauge reads in
percent full.
RV-2 Transfer Tank Inner Shell Relief
Provides protection from excessive pressure in the transfer tank
Valve
inner shell.
SD-3 Transfer Tank Inner Shell Rupture
Provides an additional level of protection from excessive pressure
Disc
in the storage tank.
C-3
Converter Vent Line Connector
Connector for attaching the converter vent line, allowing the
converter to vent excess gas vapors back to the storage tank.
C-2
Filler Valve
Connects the transfer tank to the converter for LOX transfer.
CV-1 Converter Vent Line Check Valve
Keeps pressure from the storage tank from flowing back into the
converter through the vent line.
F-1
Converter Full Indicator Gauge
A vapor pressure thermometer that monitors the converter vent
line temperature. During the transfer of LOX to a converter, the
thermometer indicates the warmer "GAS" temperature in the
converter vent line. When the converter is full, the vent line fills
with LOX, and the converter vent line temperature drops. The
gauge indicator moves to the "LIQUID" position, indicating a full
converter.
GV-4 Converter Vent Line Shutoff Valve Controls the flow of oxygen gas vapors from the converter to the
storage tank and prevents loss of storage tank gas when the
converter is not being filled.
GV-5 Transfer Tank Pressure Buildup
Controls the flow of LOX from the transfer tank to the pressure
Valve
buildup coil. This valve is opened only when pressure is required
to fill the converter.
SD-2 Outer Shell Relief Device
A rupture disc that provides an additional level of protection from
excessive pressure in the outer shell.
CV-2 Converter Vapor Return Check
Keeps pressure from the storage tank from flowing into the
Valve
converter. (Code C and D carts only.)
10-8
