Taylor-Wharton EF-450 - Manual (Page 5)

INTRODUCTION
This manual provides information for the operation and maintenance of Taylor-Wharton's line of Express Fill
450 cryogenic gas supply systems. These products store cryogenic liquid and dispense it as a warm
pressurized gas. The Express Fill 450 is designed for applications requiring nitrogen, argon, or oxygen gas.
These products are ideal for on-site filling with Taylor-Wharton’s Express cryogenic liquid delivery vehicle.
Additional product specifications, flow diagram, views, and important dimensions are shown on the general
arrangement drawing provided in the appendix of this manual.
System Description
The Express Fill 450 consists of a cryogenic liquid vessel, piping, internal vaporizer, and an internal pressure
builder.
The system vessel has an approximate gross capacity of 450 liters. The vessel consists of a pressure vessel
suspended inside a jacket. The space between the pressure vessel and the jacket is evacuated and insulated
with a micro-fiberglass / aluminum foil radiation shield. Both the inner pressure vessel and vacuum jacket are
constructed of type 304 stainless steel. Models are available designed and constructed in accordance with
DOT-4L or ASME Section VIII. The DOT-4L vessels may be legally transported by truck in the United
States while containing product.
Piping circuits allow the vessel to vent, fill, pressurize, and provide pressurized gas. Piping is type-304
stainless steel. Valves are brass. Fittings are machined from forged brass.
Instrumentation consists of a pressure gauge and a differential pressure gauge. The pressure gauge allows the
vessel pressure to be monitored. Accurate measurement of the vessel contents is provided by the differential
pressure gauge. The differential pressure gauge instrument lines are constructed of copper tube.
The Express Fill 450 automatically maintains pressure by vaporizing cryogenic liquid in a controlled fashion.
All energy for building pressure and vaporizing liquid is provided by heat from ambient air. The vaporizer
and pressure builder coils are attached to the inside surface of the outer jacket.
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