Butterfly Valves

Butterfly valves and ball valves both have similar operating principles. All that the butterfly is is a disc attached to a rod. When the valve opens, the disc is moved back to admit the flow. The valve closes when the rod turns the disc by a quarter turn to a point perpendicular to the flow direction. The butterfly valves are utilized for on-off or modulating services due to their lightweight, lower costs, compact installation footprint, availability in large sizes, and speedy operation. These valves are operated by handles, gears, or mechanical actuators. 


  • Small and swiftly opening and closing when activated, butterfly valves are tiny.
  • The disc is lighter than the ball valve, thus the valve needs less structural support for a similar diameter.
  • The accuracy of butterfly valves makes them particularly useful in industrial settings.
  • They are highly dependable and require very little maintenance.


  • Even when fully open, a piece of the disc is exposed to the flow.
  • The butterfly valve always causes a pressure switch across the valve, regardless of the setting.
  • The thicker liquids may prevent the disc from rotating.


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