The Mono Ball Valve design is used for direct shutoff of flow like any ball valve. The difference is the compact design and light weight.
The valve can be used in conjunction with other valves in the series to allow for a safer shutoff creating a double block for safety. This can also be used with a double block and bleed valve where safety shutoff is of great concern but still allows for a small profile.
HK02 Series Data Sheet
Hex Condensed Catalog
Hex Condensed Catalog – A4