Which valve uses a rotating disk perpendicular to the flow that can rotate to 90 degrees and is used for large diameters but may leak at the seat?

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Study for the NANTeL Mechanical Engineering Certification Test. Master the format with quizzes, hints, and explanations designed for exam success. Ready yourself with focused preparation for your certification!

Multiple Choice

Which valve uses a rotating disk perpendicular to the flow that can rotate to 90 degrees and is used for large diameters but may leak at the seat?

This is describing a butterfly valve. It uses a flat circular disk mounted on a shaft that sits perpendicular to the flow. Turning the shaft rotates the disk about 90 degrees to open or close the valve. This design is particularly well suited for large-diameter piping because it’s compact, lightweight, and cost-effective compared with other valve types used for big sizes. A common drawback is that sealing relies on the disk edge pressing against a seat, so leakage at the seat can occur if the seat wears, becomes damaged, or isn’t properly seated under operating conditions.

Which valve uses a rotating disk perpendicular to the flow that can rotate to 90 degrees and is used for large diameters but may leak at the seat?

Study for the NANTeL Mechanical Engineering Certification Test. Master the format with quizzes, hints, and explanations designed for exam success. Ready yourself with focused preparation for your certification!

Which valve uses a rotating disk perpendicular to the flow that can rotate to 90 degrees and is used for large diameters but may leak at the seat?

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