| 摘要 |
PROBLEM TO BE SOLVED: To provide a nitrogen gas separation device for filling a tire capable of avoiding the functional deterioration of a membrane dryer and a nitrogen separation film and the shortening of life caused by the contamination of moisture, oil, dust, etc., in supplied compressed air. SOLUTION: As an automatic drain valve is provided at a lower part of an air filter mounted inside a device package to automatically discharge drain when the quantity of the drain exceeds a predetermined quantity, the functional deterioration of the membrane dryer and the nitrogen separation film and the shortening of life caused by the contamination of moisture, oil, dust, etc., in supplied compressed air can be avoided.
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