| Features |
| the same construction like Series 70 |
| T-clamp connection or butt weld with long neck |
| Inner face 0.6w polished |
| Helium-tightnes-detector tested |
| Valve assembly in separated room with purity |
| acc.to US-norm 209e,class 1000 |
|
| Optimum seal - patented !!! |
 |
