Is there a reason why OS&Y would be better on backflow preventers for fire suppression systems over butterfly valves?
One application where we often must use the OS&Y is when the backflow serves a fire pump and we don't want to distort the flow and cause cavitation at the pump - but otherwise the butterfly valves are a major space saver. Just curious if others feel differently or if I'm missing a major benefit to the OS&Y type.
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