Sealing technology manual for the process industry - Damage analysis

Seals may be damaged in several ways. Damage is often caused by changes in the process media and the fact that their effects on the seal ma- terials were not taken into account in advance. After an incident, it is essential to find out the cause in order to prevent sub- sequent damage and to find the right seal for the individual application. Freudenberg’s application support cre- ates meaningful damage analyses and helps you fix the problem. When a case of damage occurs, the following documentation has to be carried out. How should seal damage be docu- mented? • Take photographs of the installed seals using the maximum resolu- tion possible • Indicate self-inflicted damage (e.g. by using a screwdriver during the removal) • Give the exact installation location: valve number, component etc. • Observe mating surfaces and grooves (condition, roughness, de- posits etc.) and document changes Which media have contact with the seal and what are the circumstances? • Products: • Ingredients • Pressures • Temperatures • Concentrations • If possible, obtain the safety data sheets • Flavoring agents: • If samples are allowed to be taken, they should be filled into glass bottles • Listing of the flavors, which are in direct contact with the seal • Cleaning media: • Media sequence • Pressures • Temperatures • Concentrations of the cleaning agents and frequency of cleaning • If possible, obtain the safety data sheets MARKET-SPECIFIC SERVICES DAMAGEANALYSIS Introduction 10

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