NEN EN 12690 : 1999

Foreword
Introduction
1 Scope
2 Normative references
3 Definitions
4 Hazards
5 Performance classes
6 Classification and verification of performance
7 Marking and packaging
8 Documentation
Annex A (informative) Guidance on materials, design
                        and manufacture
Annex B (informative) Guidance on seal classification
                        and applications
Annex C (informative) Bibliography

Covers performance criteria for shaft seals in equipment used in biotechnological processes with respect to the potential risks of microorganisms in use for the worker or environment. Applies where the intended use of the shaft seals includes hazardous or potentially hazardous microorganisms used in biotechnological processes or where exposure of the worker and/or environment to such microorganisms is restricted for reasons of safety.