Taylor-Wharton Auto Fill Laser Pak - Manual (Page 14)

14
Customer Installed Equipment/Piping
Designing safe and effective cryogenic systems requires extensive knowledge and experience. Persons
lacking the necessary skills are urged to seek competent advice before attempting to design cryogenic systems.
Design and consultation services are available from the factory. Contact information is provided at end of the
manual.
Important: When installing the vaporizer and piping be sure to follow accepted design practices for cryogenic
equipment. Use only components compatible with cryogenic liquids. Be sure to include pressure relief valves
in all piping where liquid product could be trapped between closed valves, regulators, etc. Any components
installed downstream of the bulk tank, including the bulk liquid withdrawal valve, must be rated for 500 psig
service pressure or higher.
Install the cryogenic bulk tank per the manufacturer’s instructions. It is recommended that a bulk tank with a
gross capacity of at least 500 gallons be used. Maximum operating pressure of the bulk tank should be 175 or
250 psig. Set the bulk tank pressure-building regulator to at least 100 psig.
If the bulk tank liquid withdrawal valve is not rated for service to 500 psig, it should be replaced. If this is not
possible, install a valve with an adequate pressure rating immediately downstream. Disable the upstream
valve by opening it and removing the valve handle. Wire tie a permanent tag to the valve reading, “DO NOT
CLOSE.”
It is recommended that a strainer, the same size as the bulk liquid withdrawal line, be installed downstream of
the bulk liquid withdrawal shut-off valve. The strainer will prevent particulate contamination from entering
the system and interfering with the function of the solenoid and relief valves. A strainer of mesh size 20 or
finer is recommended.
Install the Auto-Fill Laser Pak outdoors as close as possible to the bulk tank. This will minimize filling times
and allow maximum flow performance. If it is not possible to install the Auto-Fill Laser Pak reasonably close
to the bulk tank, the customer should consider the use of insulated piping. The line connecting the bulk tank
to the Auto-Fill Laser Pak should be pipe size ¾” or larger. Use a reducer immediately before the Auto-Fill
Laser Pak bulk connection (CN-1) to adapt to the ½” FNPT connection fitting.
The Auto-Fill Laser Pak vents gas while filling. In an area where this may cause risk of asphyxiation, the vent
valve outlets should be piped away to a safe location. Piping size and length should be designed to prevent
excessive pressure drop. Excessive pressure drop will cause extended filling times. When in doubt, monitor
the area with an oxygen level detector.
The vaporizer must have a maximum operating pressure of at least 500 psig. An operating pressure of 600
psig or greater is recommended. This allows the vaporizer relief valve to have a greater opening pressure than
the Auto-Fill Laser Pak relief valves. This reduces the possibility of product loss due to the vaporizer relief
valve opening prematurely. A vaporizer with adequate capacity must be specified. It is recommended that a
vaporizer rated for 15,000 SCFH be selected. The piping connection on the Auto-Fill Laser Pak for the
vaporizer (CN-2) is ½” female tapered pipe thread. Adapt the piping size to the vaporizer inlet as necessary.
Important: Ensure that the vaporizer is equipped with a relief valve with adequate flow capacity and proper
opening pressure. Follow the vaporizer manufacturer’s recommendations on selecting and installing the
proper relief valve.