Verbessertes Ventil mit Verschlusskörper mit Dichtungsmittel aus Elastomer

摘要

An actuator (4) moves a rod (3) attached to a first part (6) of a piston (1). The second part (5) is the O-ring and the thir part (7) forms the expanded top end of a hollow rod (13). This rod fits into a support at the bottom. The first and third parts of the piston may be screwed together, and may have shallow grooves which hold and compress the r while causing it to expand outward to seal against the cylindrical valve seat (2).