Taylor-Wharton EF-1500 - Manual (Page 18)

BT-481 REV. B
18
The vessel safety valve (SV-1) and inner container safety disc (R-1) must be piped to the single fill box safety line. The
existing safety disc must be removed and replaced with an equivalent device featuring outlets with pipe threads. Consult
the factory when specifying this component. Thread the compression fittings for the safety line of the vessel
(recommended above) into the safety valve and safety disc outlets. Connect the safety valve and safety disc fittings to a
compression union tee with the recommended tubing. Connect the compression union tee to the fill box with the same
tubing material.
The schematic below shows the components used in the wall mounted fill box. The fill box mounts on an exterior wall
with the pipe stub connections extending through the wall. Use silicone sealant to weather-tight the fill box against the
wall. Do not install the fill box at face height. Mount the fill box approximately 3 to 4 feet above the ground.
After the installation is complete, perform a pneumatic leak test on the lines (fill, vent, and safety) per ANSI/ASME
B31.3-345.5. Isolate the vent line from the vessel during the leak test by closing the vessel vent valve (V-2). It will be
necessary to test the safety and fill lines while disconnected from the vessel. The vessel connection ends of the lines
should be capped during testing. Check all line connections at reduced pressure with an oxygen compatible bubble-
forming leak check solution.
Figure 9: Fill box detail schematic (side-view).
Legend: Fill Box Detail Schematic
Item # Description
1 Safety Line Connection, 1/2” Male Pipe Stub
2 Vent Line Connection, 1/2” Male Pipe Stub
3 Fill Line Connection, 1/2” Male Pipe Stub
4 Vent Line Relief Valve
5 Enclosure Vent
6 Vent Line Exhaust
7 Fill Line Ball Valve, 1/2” Female Pipe Thread, Fitted with proper CGA
fitting (295 for argon or nitrogen, 440 for oxygen)
8 Vent Line Shut-Off Valve, 1/2” Female Pipe Thread
9 Vent Line Pressure Gauge
10 Safety Line Baffle
11 Fill Box Enclosure
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