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- Dictionaryball valve
noun
- 1. a one-way valve that is opened and closed by pressure on a ball which fits into a cup-shaped opening.
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- Ball valve
Quarter-turn valve which uses a hollow, perforated and pivoting ball to control fluid flow
A ball valve is a flow control device which uses a hollow, perforated, and pivoting ball to control fluid flowing through it. It is open when the hole through the middle of the ball is in line with the flow inlet, and closed when it is pivoted 90 degrees by the valve handle, blocking the flow. The handle lies flat in alignment with the flow when open, and is perpendicular to it when closed, making... Wikipedia
