DBB (double block and bleed) valves realization

These kinds of valves are widely used and in all cases two pressure points have to be isolated. Thanks to a double block point and a bleed one, a three-way protection is guaranteed. The double block is important because if the first valve doesn’t work properly, the second valve came into operation avoiding substances leak. This is the reason why such valves assure high safety levels; furthermore they condensate three functions in a single product.