FIELD: water and air purification technology.
SUBSTANCE: invention relates to a fuel filter assembly and a method for draining water from a fuel filter assembly. Fuel filter assembly comprises filter element with a water collecting space and a water drain outlet, the filter element being connected to a fuel pipe for feeding an upstream side of the filter element with fuel and for providing filtered fuel from a downstream side of the filter element; a pressure relief check valve in communication with the water collecting space and the water drain outlet; a fuel pump arranged downstream from the filter element, wherein the fuel pump can be operated in a first mode for drawing fuel through the filter element and in a second, reverse mode for feeding fuel back to the filter element; and a fuel check valve located upstream of the filter element providing flow to the inlet side of the filter element. Method of draining water from the fuel filter assembly includes providing a fuel filter assembly, operation of the fuel pump in the second reverse mode with an increase in pressure in the filter element and/or water collection space and opening the drain valve once the pressure in the filter element and/or water collection space exceeds a predetermined value.
EFFECT: simplicity, high reliability.
9 cl, 13 dwg
