Fuel Tank Safety Caps


The Protectoseal combination safety fill cap,
flash arrester and pressure / vacuum relief
device is designed for installation in fuel tank
openings of gasoline or diesel-powered equipment.
The flash arrester keeps a flame from
entering the tank, thereby preventing explosion
of the confined vapors within the tank. Safety
fittings provide sufficient pressure relief to prevent
tank rupture and sufficient vacuum relief
to facilitate gas flow from the tank. Spring-loaded, self-closing cap protects
against evaporation losses.
Available in various sizes for
mounting to standard 11/2”
through 4” NPS and NPT male
and female fill pipe connections,
quarter-turn, easy-on flange connections,
as well as a variety of
common mechanical threads.
Wide-opening hinge mechanism minimizes interference with nozzles,
etc. during fill operations.
Caps are die cast aluminum or cast brass construction.
Each Fuel Tank Safety Cap is designed to accommodate an optional
perforated metal flash arrester screen which allows flow of liquid into
the tank during filling but prohibits entry of an external flame into the
connected fill pipe. Screen also serves as a strainer to prevent particulate
matter from entering the tank minimizing fuel contamination.
Vacuum relief is provided by a resealing vacuum breaker that controls
fugitive emissions at positive pressures below the relief setting.
Padlock opening provides lockability to prevent theft or unauthorized
access. Use of padlock does not impair the automatic pressure relief
capability of the spring loaded cap assembly.
Perforated plated steel, replaceable arrester screens are available in
straight and/or tapered configurations.
Durable lead-free finish, color coded to indicate a specific industry
standard storage application: Red designates gasoline; Green designates
Underwriters’ Laboratories Listed, Patent Pending
Gasoline / fuel resistant fluoroelastomer compound gasket.
Self-closing tension spring insures against leaving the tank opening
exposed to atmosphere.
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