Gasboy Atlas Fuel Systems Site Prep Manual - Manual (Page 32)

Site Preparation Plumbing Requirements
Page 28 MDE-4333E Atlas Fuel Systems Site Preparation Manual · November 2011
• Whenever non-equivalent fuel conversions are performed, it is recommended that all units
be checked for calibration within one month of fuel conversion.
• Some non-equivalent fuel conversions will necessitate the requirement to change the
pump/dispenser filter type previously used. Consult your ASC or Gilbarco Distributor for
any changes required.
• In Flexible fuel dispensers, Gilbarco recommends the use of 10 micron filters for
gasoline-based flexible fuels. Although the use of finer filtration is allowable, filters will
tend to clog prematurely, causing excessive filter maintenance cost.
• Use only meters and registration devices for DEF that have a National Type Evaluation
Program (NTEP) Certificate of Compliance issued by the National Conference on Weights
and Measures (NCWM).
• Non-metallic piping and components used in aboveground DEF service must have high
melting points and adequate strength and durability. Some plastic compounds that are
suitable for DEF may not be compatible with petroleum products. They must be avoided
at locations where they could come in contact with petroleum from a routine operation or
a spill.
• An anti-siphon valve must be installed on Aboveground Storage Tanks where the DEF
level can be at a higher elevation than the supply piping or the dispenser. The valve will
prevent a potential leak in the piping from creating a siphon that could cause a product
release.
DEF Plumbing
DEF freezes at approximately 11.3 °F. Model variations of DEF units exist with and without internal
heaters. Ensure you do not use a unit without a heater if the site may experience temperatures
12 °F or lower. If the unit freezes severe damage may occur to hydraulic components. Such
damage is not covered by warranty.
CAUTION
External exposed plumbing must be heated and insulated for sites that may experience
temperatures of 12
° F or lower. Thermostatic control is recommended. Heating must be turned
on at a higher temperature than 12 ° F to ensure no localized section of the pipe experiences a
temperature lower than 12 ° F. Power to the heaters must never be disabled during very cold
weather.
Insulation used on piping for areas that may experience hot as well as very cold temperatures
must be shielded from direct sunlight or coated/painted with reflective or white color. DEF can
become very hot if dark or black insulation is heated by sunlight during hot weather.
Overhead plumbing sometimes used with DEF installations, presents special difficulties
(inability to purge air out of the lines, calibration issues, and so on) if not installed properly.
An automatic or manual bleed system must be installed at the high point of the plumbing to
facilitate air removal during installation or operation. For recommendations, consult Gasboy
Technical Support.