Importance

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Abstract

A filter device for compressed air including first and second filters, wherein the first filter is free from a variation in the filtering efficiency, and does not require periodic replacement of its packing, leading to a reduced maintenance cost of the first filter. The first filter is adapted to separate the liquid and solid particles from the compressed air passing therethrough, while the second filter is adapted to remove or eliminate any residual liquid and solid particles remaining in the compressed air passing therethrough. The first filter includes a deflector for whirling incoming compressed air, the deflector having spiral vanes integrally formed around the axis, and being disposed such that an axial direction of the deflector coincides with the direction of flow of the compressed air through the first filter, so as to whirl the incoming compressed air, whereby any residual liquid and solid particles remaining in the compressed air are separated therefrom, due to a centrifugal force which occurs upon impingement of the compressed air upon the vanes.

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First Claim