Cast Iron Butterfly Valve, Brand Name : Huno

A butterfly valve is a quarter-turn rotational motion valve used to start, stop, and regulate fluid flow. It operates via a rotating disc mounted on a central shaft, which turns 90 degrees to fully open or close the passage.

Core Components

• Disc: The closing element positioned in the middle of the pipe. Rotating it parallel to the flow allows fluid through, while rotating it perpendicular seals the valve.
• Stem (Shaft): Connects the internal disc to the external actuator or hand lever.
• Body: Fits between pipe flanges. Common body styles include Wafer (sandwiched between pipe flanges) and Lug (protruding threaded bolts for direct connection).
• Seat: An elastomeric or metallic lining inside the body that ensures a tight seal against the disc when closed.

Key Offsets & Types