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4. Conclusion
For general applications, industrial valves will continue to evolve towards quarter-turn actuated valves, i.e. :
to ball valves for small sizes (DN = nominal diameter < 80 mm) ;
to butterfly valves for larger sizes : DN > 65 mm.
This outlook is due to :
the ease with which these taps can be controlled (both automatically and manually);
their sealing performance (100% leaktight) and flow performance (low or very low head losses);
flexible pipe connections (3-piece ball valve, etc.);
the small size of butterfly valves and the possibility of installing them between flanges (wafer...);
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Conclusion
Glossary
Bibliography
Regulations
DI 97/23/EC Directive on the approximation of the laws of the Member States concerning pressure equipment, 05/29/1997.
Standards and norms
AFNOR Robinetterie industrielle – Nomenclature des pièces constitutives des principaux appareils de robinetterie. E29-307, December 1989, standard cancelled in December 2005.
- AFNOR Valves and fittings – Terminology – Part 1: definition of device types. - NF EN 736-1 - février 2018
- AFNOR Valves and fittings – Terminology – Part 2: Definition of valve components – Faucets and valves...
Directory
Organizations (non-exhaustive list)
Association française des fabricants de pompes et agitateurs, de compresseurs et de robinetterie). (PROFLUID).
Center technique des industries mécaniques (CETIM).
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