Fuel water separator filter with water drain
First Claim
1. A fuel water separator filter, comprising:
- a filter housing defining a filter element chamber and a water sump, the filter element chamber is separated from the water sump by a wall;
a coalescing filter element disposed in the filter element chamber, the coalescing filter element configured to separate water from fuel; and
at least one passageway in the wall that fluidly connects the filter element chamber and the water sump, the at least one passageway being the only passages through which fluid can flow into the water sump, other than atmospheric air via a drain valve,flow through each of the at least one fluid passageway being controlled by at least one valve, the at least one valve having a first, open position that permits fluid flow from the filter element chamber into the water sump and a second, closed position preventing fluid flow between the filter element chamber and the water sump;
the filter housing further includes the drain valve in communication with the water sump to permit draining of water from the water sump; and
the filter housing further includes an inlet such that all fluid that flows into the inlet flows into the filter element chamber.
1 Assignment
0 Petitions
Accused Products
Abstract
A fuel water separator (FWS) filter that is configured to permit water to be drained from the water sump of the FWS filter without shutting off fuel flow to the FWS filter. A check valve is positioned between the water sump and the filter element. When the FWS filter is under vacuum (e.g. as in operation), the check valve can be closed to allow water to drain from the sump. The check valve can close automatically by floating on accumulated water in the sump until the water rises to a level where the check valve is closed. The check valve can also close by opening the drain valve of the FWS filter, which causes a differential pressure between the sump and the vacuum created in the filter element chamber, which forces the check valve to close.
16 Citations
22 Claims
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1. A fuel water separator filter, comprising:
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a filter housing defining a filter element chamber and a water sump, the filter element chamber is separated from the water sump by a wall; a coalescing filter element disposed in the filter element chamber, the coalescing filter element configured to separate water from fuel; and at least one passageway in the wall that fluidly connects the filter element chamber and the water sump, the at least one passageway being the only passages through which fluid can flow into the water sump, other than atmospheric air via a drain valve, flow through each of the at least one fluid passageway being controlled by at least one valve, the at least one valve having a first, open position that permits fluid flow from the filter element chamber into the water sump and a second, closed position preventing fluid flow between the filter element chamber and the water sump; the filter housing further includes the drain valve in communication with the water sump to permit draining of water from the water sump; and the filter housing further includes an inlet such that all fluid that flows into the inlet flows into the filter element chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A filter, comprising:
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a filter housing defining a filter element chamber and a water sump, the filter element chamber is separated from the water sump by a wall; a coalescing filter element disposed in the filter element chamber, the coalescing filter element configured to separate water from a fluid; and at least one passageway in the wall that fluidly connects the filter element chamber and the water sump, the at least one passageway being the only passages through which fluid can flow into the water sump, other than atmospheric air via a drain valve, flow through each of the at least one fluid passageway being controlled by at least one valve, the at least one valve having a first, open position that permits flow of water from the filter element chamber into the water sump and a second, closed position preventing flow of water between the filter element chamber and the water sump; the filter housing further includes the drain valve in communication with the water sump to permit draining of water from the water sump; and the filter housing further includes an inlet such that all fluid that flows into the inlet flows into the filter element chamber. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A fuel water separator filter, comprising:
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a filter housing defining a filter element chamber and a water sump, the filter element chamber separated from the water sump by a wall; a coalescing filter element disposed in the filter element chamber, the coalescing filter element is configured to separate water from fuel and to remove particulate contaminants from the fuel; at least one passageway defined in the wall that fluidly connects the filter element chamber and the water sump, the at least one passageway being the only passages through which fluid can flow into the water sump, other than atmospheric air via a drain valve, flow through each of the at least one passageway being controlled by at least one valve; and the drain valve in communication with the water sump to permit draining of water from the water sump, the filter being configured to permit water to be drained from the water sump via the drain valve without shutting off fuel flow to the filter and while the filter element filters the fuel, and the filter housing further includes an inlet such that all fluid that flows into the inlet flows into the filter element chamber. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification