Fluid handling – Diverse fluid containing pressure systems – Fluid separating traps or vents
Patent
1999-04-15
2000-10-31
Walton, George L.
Fluid handling
Diverse fluid containing pressure systems
Fluid separating traps or vents
137433, 137448, 137592, 141 59, 141198, F16K 2404, F16K 3122, F16K 3124
Patent
active
06138707&
ABSTRACT:
An air transfer valve is disclosed comprising a housing (8) having an inlet (21) and an outlet (22), the outlet being controlled by a first non-return, valve (28) which is biased to its closed position and the outlet being controlled by a second valve (30) which is normally in its open position, the first valve being caused to open by an increase in air pressure within the valve but closing in response to reduced pressure. The valve is intended to be fitted into a fill pipe (1) of a fuel storage tank so that the outlet communicate with the tank ullage through an aligned hole in the wall of the fill pipe. In this situation, the valve transfers air from the fill pipe into the ullage and reduces turbulence which would otherwise cause excessive generation of vapor during tank filling (FIG. 1).
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W & J Risbridger Limited
Walton George L.
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