Butterfly valve

From GAWDAwiki

A butterfly valve is a type of valve that restricts and allows flow by turning a disc on a rod. When the disc is turned to completely block a passageway, the valve is closed. When the disc is given a quarter turn, the valve is opened and flow is allowed.^[1]

Other Types of Valves

Other types of gases and welding valves include:

• Ball valve
• Compressed gas valve
• Cylinder valve
• Diaphragm check valve
• Gate valve
• Globe valve
• Life support valve
• Lift-check valve
• Manifold valve
• Metering valve
• Needle valve
• Pneumatic valve
• Post valve
• Pressure relief valve
• Residual pressure valve
• Shutoff valve
• Solenoid valve
• Stop-check valve
• Swing check valve

References

1. http://www.wisegeek.com/what-is-a-butterfly-valve.htm