1) The disc, which is located inside the body, pivots a quarter turn (90°) around a stem. |
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2) Because has the smallest and most compact face of all valves, the butterfly valve is lightweight and easy to install and uninstall from the piping. |
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3) Butterfly valves can be used for either throttling (regulating flow volumes at an intermediate opening) or for full on, full off flow control. |
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