Pigging ball valve
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United States of America Patent
Stats
-
Apr 5, 2005
Grant Date -
May 27, 2004
app pub date -
Nov 26, 2002
filing date -
Nov 6, 2002
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A pigging ball valve with a ball core mounted on an improved trunnion mounting. The pigging ball valve has a valve housing with a longitudinal axis. A side entry port on the valve housing is provided for entry of pigs into the valve housing. The ball core has an interior bore and is mounted on a trunnion in the valve housing for rotation about a transverse axis to the longitudinal axis of the ball core. The trunnion is a rotating stem journalled in the valve housing and connected to the ball core by a non-cylindrical portion and a cylindrical portion extending from the non-cylindrical portion towards the interior bore of the ball core. Preferably, the cylindrical portion terminates inwardly in a curved portion fitting the interior bore of the ball core.
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