Gas valving - Medium pressure - Isolating valves called push buttons (F and F1 type)

Introduction 4

1 Domaine d'application 4

2 Références normatives 4

3 Exigences de construction 4

3.1 Exigences dimensionnelles 5

3.2 Manoeuvre de fermeture 6

3.3 Position fermée 6

3.4 Manoeuvre d'ouverture 6

3.5 Position ouverte 6

4 Exigences de fonctionnement 6

4.1 Généralités 6

4.2 Débit-repère 7

4.3 Effort de manoeuvre 7

4.3.1 Exigences 7

4.3.2 Temps de fermeture 7

4.4 Endurance 7

4.5 Résistance aux conditions climatiques 7

5 Marquage 8

6 Essais de durabilité du marquage 8

6.1 Classification des marquages 8

6.1.1 Première catégorie 8

6.1.2 Seconde catégorie 8

6.2 Essais 8

6.2.1 Essai N° 1 8

6.2.2 Essai N° 2 8

6.3 Exigences 9

7 Notice d'installation 9

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