The NIBCO® bronze ball valve provides ease of operation with quarter-turn (90 degrees) open to close. The two-piece valve is ideal for commercial and light industrial process applications that may include HVAC, hot and cold domestic water, low pressure steam, compressed air, LP gas and natural gas.
The NIBCO® bronze ball valve provides ease of operation with quarter-turn (90 degrees) open to close. The two-piece valve is ideal for commercial and light industrial process applications that may include HVAC, hot and cold domestic water, low pressure steam, compressed air, LP gas and natural gas.
https://www.nibco.com/nibco-products/valves/ball-valves/t-580-a/
very interesting, thanks for digging this up!!