The Valve O-Ring sits at the base of the Normally Open and Normally Closed Valve assemblies found in EA 2400 Elemental Analyzers. With this part number, the O-Ring can be ordered separately as a replacement or spare part.
To keep your Elemental Analyzer operating efficiently, you should clean and rebuild the Normally Closed Valve periodically. Maintenance instructions are included in your operator's manual. Maintenance of the Normally Open Valve requires a PerkinElmer Engineer.