Filetage

Les raccords des séries 1 à 3 sont équipés d'un filetage et d'un taraudage. Tous nos filetages, c'est-à-dire l'élément fileté intégral et la collerette d'étanchéité sont réalisés sans plan de joint. Les profondeurs filetées mâles sont conformes aux normes en vigueur, les tolérances, étant adaptées au filetage métallique, ne peuvent pas être appliquées au filetage plastique.

Nos raccords et robinetteries peuvent être munis des filetages suivants:

FILETAGE CYLINDRIQUE DIN ISO 228 BSP FILETAGE NPT ANSI/ASME B 1.20.1 FILETAGE MÉTRIQUE ISO DIN 13 FILETAGE UNF ANSI/ASME B 1.1
G 1/16“ NPT 1/8“ M 5 N 10 - 32 UNF
G 1/8“ NPT 1/4“ M 6 N 1/4“ - 28 UNF
G 1/4“ NPT 3/8“ M 8 N 7/16“ - 20 UNF
G 3/8“ NPT 1/2“ M 10 x 1 N 9/16“ - 18 UNF
G 1/2“ NPT 3/4“ M 10 x 1,5 N 5/8“ - 18 UNF
G 5/8“ NPT 1 M 12 x 1,5 N 1/2“ - 20 UNF
G 3/4“ M 14 x 1,5
G 1 M 16 x 1,5
M 18 x 1,5
M 20 x 1,5

D'autres filetages sur demande.

Filetage cylindrique : G, M ou UNF

Filetage cylindrique : G, M ou UNF

Le montage fiable d'un raccord est assuré quand le serrage est limité par une butée définie. Nos filetages G, M et UNF satisfont à cette exigence. L'étanchéité est assurée par la collerette. Dans certains cas, il est possible d'ajouter un joint torique.

Filetage conique : NPT

Filetage conique : NPT

En ce qui concerne le filetage NPT, l'étanchéité n'est pas assurée via la collerette mais par le filetage même.

Jonction sans volume mort

Jonction sans volume mort

Afin d’éviter tout volume mort indésirable, emtechnik a développé un raccord à filetage G cylindrique dont l’étanchéité est assurée par un cône (cône extérieur). Condition requise : le taraudage doit être équipé d’un cône intérieur correspondant.

Attention: En règle générale, il faut veiller à ce que filetage et taraudage concordent toujours. C’est-à-dire, si vous utilisez un raccord mâle avec un filetage G, la robinetterie devrait être, elle aussi, équipée d’un taraudage G. Le filetage conique dans un taraudage cylindrique (voir croquis) montre clairement qu’il est impossible de réaliser un assemblage serré et donc étanche.

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