Fluid handling – Liquid level responsive or maintaining systems – By float controlled valve
Patent
1991-01-29
1992-03-17
Walton, George L.
Fluid handling
Liquid level responsive or maintaining systems
By float controlled valve
137400, 137432, 137448, 137312, 141128, 141198, 2511499, 251212, F16K 3122, F16K 3300
Patent
active
050959379
ABSTRACT:
A two stage float actuated shutoff valve for use in underground fuel storage tanks having a co-axial vapor recovery system utilizes a drop tube co-axially mounted within the storage tank fill pipe. Fuel flowing into the tank is passed through the drop tube which projects downwardly into the interior of the tank to a valve housing located at the lower end of the drop tube. Tubular floats slidably mounted on the drop tube within the tank independently operate pivoted flapper valves to a closed position within the valve housing, a lower float closing one valve flapper to block a major portion of the incoming fuel flow passage when the level of fuel in the storage tank reaches a predetermined first level and a second upper float closing a second flapper to completely close the flow passage when the level of fuel rises to a predetermined level about the first level. A float actuated locking arrangement for preventing inadvertent premature closing of either valve flapper is disclosed.
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Emco-Wheaton Advertisement for the A1100 Guardian, "Petroleum-Marketer", Sep.-Oct., 1990.
OPW Advertisement for OPW 61-50, "Petroleum--Marketer", Sep.-Oct., 1990.
Johnson Bruce R.
LeBlanc Leo J.
EBW, Inc.
Walton George L.
LandOfFree
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