Cleaning for oxygen services

In addition to the use of suitable materials and an adapted design, the cleaning of industrial valves for use in oxygen environments is extremely important, as oxygen is a highly reactive substance that can easily ignite impurities or residues in valves.

For this purpose, RITAG has established a standard that describes how RITAG valves are cleaned, assembled and tested for use in oxygen applications (oil and grease-free). This RITAG standard is based on the MSS-SP-138 standard of the American National Standards Institute (ANSI).

The individual components of the valve are first subjected to a material identity check (PMI) before assembly. This ensures that only materials that are suitable and approved for use in oxygen are used. 

The components are then thoroughly cleaned using special processes to ensure that no residues or impurities remain that could react with oxygen. Colloquially speaking, the fittings are then free of oil and grease. These work steps are carried out in specially designated rooms, away from general production. Tests with appropriate test equipment confirm successful cleaning.

After cleaning and testing, assembly is carried out using suitable tools that have also been cleaned. A final inspection and packaging in foil complete the cleaning process.

To indicate that the valve is intended for installation in an oxygen system, a sticker is affixed to the packaged valve so that the user only opens the packaging directly before installation.