Taylor-Wharton EF-1500 - Manual (Page 17)

BT-481 REV. B
17
Figure 8: Typical fill box installation diagram.
Recommended components for a typical fill box installation:
Fill and Vent Line
Vessel Fitting:
Compression Fitting, 1/2” Male Pipe Thread x 7/8" O.D. Tube, Brass (2 required)
Tubing: Copper, 3/4" Size (7/8” Actual O.D.), Type K (.065” Wall), per ASTM B-88
Fill Box Fitting: Compression Fitting, 1/2” Female Pipe Thread x 7/8" O.D. Tube, Brass (2 required)
Safety Line
Vessel Fittings:
Compression Fitting, 3/4” Male Pipe Thread x 7/8" O.D. Tube, Brass
Compression Fitting, 1/2” Female Pipe Thread x 7/8" O.D. Tube, Brass
Safety Disc, 1/2" Inlet x 1/2” Outlet, (Consult with factory for part.)
Compression Union Tee Fitting, 7/8” O.D. Tube, Brass
Tubing: Copper, 3/4" Size (7/8” Actual O.D.), Type K (.065” Wall), per ASTM B-88
Fill Box Fitting: Compression Fitting, 1/2” Female Pipe Thread x 7/8" O.D. Tube, Brass
Warning: It is essential that the lines be connected properly. If the vessel safety line were attached to the fill box fill line
or vent line, the vessel pressure relief devices could be prevented from functioning. This will cause a dangerous pressure
build-up in the vessel and in the lines. Never install a shut-off valve on the safety line.
The fill box should be located such that it is accessible for deliveries 24 hours a day. For safety and efficient filling, keep
the length of the lines as short as possible. Actual length of the lines must not exceed 20 feet. Consult with Taylor-
Wharton when installing longer lines. Use large radius bends and minimize the number of bends. If wrought copper
fittings with slip joints are used in the lines, the joints should be silver brazed. Bag-7 silver braze rod is recommended.
Pipe insulation compatible with cryogenic temperatures (urethane based foam pipe insulation or a rigid cellular-glass pipe
insulation) is recommended. All of the lines (fill, vent, and safety) should be insulated.
Warning: Lines must not be installed such that they are susceptible to damage. A crushed safety line, for example,
could prevent the relief devices from functioning properly. This will cause a dangerous pressure build-up in the vessel
and in the lines.
Attach the lines to interior walls or secure them to overhead structural members as required by local codes. If damage to
the lines is a possibility, the damage prone sections should be placed inside protective jackets. Jackets may be
constructed from PCV pipe. For heavy-duty protection, construct the jackets from steel pipe.
Fill Line
Vent Line
Safety Line