Definition of butterfly valve in English:

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butterfly valve

Pronunciation: /ˈbədərˌflī valv/


1A valve consisting of a disk rotating on an axis across the diameter of a pipe to regulate the flow, as in the throttles of many engines.
Example sentences
  • The exhaust has a butterfly valve, which cuts in between 1,500 rpm and 3,000 rpm.
  • So today I cleaned the Automatic Idle Control valve of my Saab, and the throttle butterfly valve.
  • The carburetor-heat lever turns a butterfly valve in the air-induction systems that bypasses the normally filtered air, allowing warm air to directly enter the carburetor body.
2A valve consisting of a pair of semicircular plates that are attached to a spindle across a pipe and hinged to allow flow only one way.
Example sentences
  • This stabilizing feature is possible via Watertronics patented electronic butterfly valve technology, which also provides Lou with backup pressure regulation in the event of a VFD fault.

For editors and proofreaders

Syllabification: but·ter·fly valve

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