| 摘要 |
PURPOSE:To obriate a fixed seal ring and buffer packing for supporting the fixed seal ring so as to reduce the number of parts by bringing a rotary seal ring on the mechanical seal side and a lip-type packing on the dust seal side respectively into contact with hard coated layers on the front and rear sides, thereby forming sliding sealed faces between both contact faces. CONSTITUTION:Hard coated layers 5a, 5b are annularly formed respectively at the front and rear of the axial hole peripheral part of a fitting housing 1 made of a metal plate. A rotary seal ring 6a on the mechanical seal side is brought into contact with the hard coated layer 5a on the front side, and a lip-type packing 6b on the dust seal side is brought into contact with the hard coated layer 5b on the rear side. Accordingly, sliding sealed faces can be formed between these contact faces. |
