The Bray Commercial 310400-11010390 4" Lugged Butterfly Valve Bare Stem is a flow-control valve designed for commercial HVAC hydronic piping systems. It regulates or isolates fluid flow by rotating an internal disc within the pipe, allowing the passage to open, close, or modulate as required. Its lugged body provides secure flange installation, while the bare stem accommodates a manua... https://www.partshnc.com/310400-11010390-bray-commercial-4-lugged-bflyval-bare-stem