TerryOsser, thanks for the prompt reply. Is it true that concentric butterfly valves are designed for bi-directional flows and that this is their advantage over eccentric ones?
In water distribution mains, how does one decide between sluice (or gate) valve and butterfly valve?
Is it true that...
I wish to know the respective areas of applications for concentric-disc butterfly valves as oppose to that of off-centre disc butterfly valves.
Is butterfly valves used in water supply distribution mains? If yes shold it be concentric or eccentric type?