d.
Filters: Replaceable filter element on each product line with a
nominal filtration efficiency of 0.025 mm 25 microns with a flow
rating equal to the rate of the dispensing unit.
e.
Backup: Battery backup with automatic charging circuits to hold
data for a minimum of three months without recharging. Sales
display shall remain visible for 15 minutes after power failure.
f.
Accessories: Equip each assembly with accessories such as
built-in air eliminators, line check valves, and emergency
shut-off valve. Install centering ring or stabilizer bar to
ensure proper shearing action for emergency shut-off valve if the
dispensing unit is knocked from it's supports.
g.
Interlocks: Units shall include nozzle supports interlocked to
pump motor control switch to start and stop the pump by nozzle
removal and replacement. Provide each unit with interlock switch
and valve arrangement that prevents flow of product until meter is
reset after dispensing nozzle is returned to holder.
h.
Hose: Provide dispensing hose [conforming to UL 330] [of the
coaxial vapor recovery type certified by CARB], gasoline and oil
resistant, statically grounded, flexible in sub-zero temperatures.
Provide a minimum of 3.70 meters 12 feet of hose for each product
line on the dispenser. Provide each hose with spring loaded cable
to return device attached near mid-length of hose.
**************************************************************************
NOTE: Select nozzle features based on product(s)
dispensed, customer requirements, and compatibility
with vapor recovery system. Bellowless nozzles may
only be used with vacuum assist vapor recovery
systems.
**************************************************************************
i.
Nozzles: Dispensing nozzles shall be automatic shutoff type,
without latch-open device, aluminum body, and full hand insulator
to prevent splash-back. [Nozzles shall be CARB certified for
Stage II vapor recovery, contain an integral vapor valve [and
evacuator], and be of the [bellows] [bellowless] design.] [Vapor
recovery nozzles are not required for diesel dispensing systems.]
j.
Breakaway device: Provide each product hose with UL listed [and
CARB certified] emergency breakaway device designed to retain
liquid on both sides of breakaway point. Breakaway device shall
have pressure balancing chamber to override line pressure to
prevent nuisance breaks caused by a restriction in delivery hose
diameter.
**************************************************************************
NOTE: Select type of pump; either submersible or
suction type.
**************************************************************************
k.
Pumps: [Provide submersible pumps to be located in product
storage tanks. Pump and motor combination shall operate
efficiently totally submerged in product of storage tank. When
pump only is submerged, pump shall be driven by explosion-proof
SECTION 15193N
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