| 摘要 |
<p>Piston valve, the piston of which is sealed off relative to a housing bore by means of a sealing ring that contains expanded graphite and is pressed from powder or consists of fins extending perpendicularly to the piston axis, the expanded graphite having a density of 1.5-2.2 g/cm<3>. The invention also relates to the sealing ring as such.</p> |
