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Double door at the end of the working principle
Double door at the end of the valve description: Double door at the end of the valve, also known as the check valve, the fuel tanker is stopped to prevent the suction line liquid back and must use one of the annex. Double door at the end of the valve works: the valve body and the fuel tanker suction pipe associated, when the fuel tanker motor starts, the suction tube to form a negative pressure, so that the lower body side of the pressure higher than the valve body side Pressure; valve in the upper and lower pressure differential double door at the end of the valve lift up, the oil can enter the tanker suction tube, when the motor stops working, the vacuum on the valve body cavity disappears, and due to the hydrostatic pressure Into a positive pressure, the valve will automatically close under the action of positive pressure, the oil will not fall back. Due to the check valve with two sets of the same valve and valve, the check valve performance more reliable.