Sealing element, particularly for shut-off and regulating valves, and process for its production

US5888638A · kind A · utility

Assignee

• Friedrich Grohe AG · DE

Inventors

• Werner Kleinhans · Unna, DE
• Veit Bechte · Holzwickede, DE
• Friedrich Wagner · Balingen, DE

Key dates

• Filing date: May 20, 1997
• Grant date: Mar 30, 1999
• Expiry date: May 20, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2942
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

A sealing element is made up of a shut-off body with a sealing surface; a bonding layer component provided on the sealing surface of the shut-off body and containing silicon and carbon; and a sliding layer component provided on the bonding layer component and containing silicon and carbon. The bonding layer component has a silicon content greater than that of the sliding layer component so that the bonding layer component has more ductile properties than the sliding layer component. The sliding layer component is harder than the bonding layer component. The sliding layer component is thinner than the bonding layer component and less than one um so that the bonding layer component takes up stresses of the sliding layer component without impairing adhesion capability of the bonding layer component to the sealing surface.