Pressure fitting, in particular a pressure relief and safety valve

US6047731A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hermann-Josef Conrads · Herzogenaurach, DE
• Erwin Laurer
• Juergen Model · Erlangen, DE
• Ullrich Preiss · Erlangen, DE

Key dates

• Filing date: Mar 21, 1997
• Grant date: Apr 11, 2000
• Expiry date: Mar 21, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/86485
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

The invention relates to a pressure fitting (1) having a flow channel (42), a valve cone (5), a sliding element (43), and a locking device (12). The sliding element (43) is disposed displaceably along a main axis (41) of the pressure fitting (1). The valve cone is disposed on one end (44) of the sliding element (43). The flow channel (42) is closable by the valve cone (5) and the locking device (12) can be moved into a locking position, so that in a position of the valve cone (5) that opens the flow channel (42) the locking device (12) engages the valve cone (5) and/or the sliding element (42) and keeps the valve cone (5) in the position that opens the flow channel (42). Thereby a pressure relief in a pressurized system, in particular in a pressurizer (47) of a pressurized water reactor, can be assured even to a pressureless state. The pressure fitting is particular useful as a pressure relief valve or as a combined pressure relief and safety valve.