| 摘要 |
A sealing system for a solenoid, typically for use with high pressures and for small molecule gases, utilizes a piston having a hemispherical sealing face in combination with an insert having a sharp edged seat, the piston and the insert both being aligned in a bore having a common centerline to provide repeated reliable mating and sealing of the piston and the insert. Either the sealing face or the insert is made of a plastically deformable elastomer ic material which is initially deformed to seal against the other, which is typically metal. The elastomeric is chosen so as to have a finite plastic deformation and not to yield further under design pressures
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