![](https://www.dvai.fr/wp-content/uploads/2019/10/Coquilles.jpg)
Spiral jacket
DVAI offers stainless steel spiral jacket in 316L adapted upon shells.
DVAI delivers you the spiral jacket ready to be welded on your shells.
Spiral jacket 138mm
![demi coquille 138 mm](https://www.dvai.fr/wp-content/uploads/2019/12/COQUILLE-LARGEUR-138mm.jpg)
Spiral jacket 93mm
![demi coquille 93 mm](https://www.dvai.fr/wp-content/uploads/2019/12/demi_coquilles_inox_pour_virole_largeur_93.jpg)
Model 2 : 93 mm large – 3mm thickness – 316L
Passage section : 20cm² – pressure : 6 bars
Spiral jacket 62mm
Model 3 : 62 mm large – 2,5mm thickness – 316L
Passage section : 7,8cm2 – pressure : 3 bars
![demi coquille 93 mm](https://www.dvai.fr/wp-content/uploads/2019/12/demi_coquilles_inox_pour_virole_largeur_62.jpg)