Improve Safety – Upgrade to DBB Valves
It is very easy to upgrade your existing Single Isolate Ball Valve installation. Simply use a DBB with Face-to-Face and End-to-End dimensions acc. to ASME B16.10.
Use a DBB Dual Ball Design improve Safety and Process Reliability. Here is a simple infographic to illustrate the interchangeability using ASME B16.10 dimensions:

If you want to know more why it matters, please have a look here https://taurusdbbvalves.com/asme-b16-10-why-it-matters-to-dbb-valves/
(Images source: © xmentoys / fotolia + AS-Schneider)