Definition(s)
Butterfly Valve
relatively flat, rotating disc mounted on a bearing that allows it to rotate its axis.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards
Oil & Gas Drilling Glossary - IADCLexicon.org
relatively flat, rotating disc mounted on a bearing that allows it to rotate its axis.
Source: IADC UBO / MPD Glossary, December 2011. Global Standards