Dixon® Pressure/Vacuum Relief Cap, Automatic, Cap Fitting/Connector, 2-1/2 in Nominal, MNPT End Style, Zinc, Domestic
Features
Pad lockable to prevent fuel theft and tampering
Normally closed vent stops fuel evaporation and airborne contaminants
Protects tank from pressure or vacuum buildup
Relieves pressure at 7.5 to 9 psi and vacuum at 0.33 HG
Can be used as a fuel filler cap
Manufactured to thread into both NPS and NPT tank openings
Die cast zinc body, brass screen
Used on stationary fuel tanks
Not intended for use on mobile tanks, to ensure that the cap can properly vent, the vent cap must be kept free of any debris i.e. dirt, snow, ice, rags etc
These caps are threaded into the top of stationary (non-mobile) above ground fuel storage tanks, where they serve 2 purposes: a) they can be used as a thread in and lockable fuel filter cap b) they protect the tank from expansion or implosion, the intern
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