Abstract: A pipe coupling for use with a fire hydrant or like has automatic shut-off features in the event of breakage of the fire hydrant. The breakaway pipe coupling includes an extension join to a valve body with a flow passage way extending through the extension and valve body. A shut-off valve is moveably mounted to the extension and is bois for movement toward a valve seat located in the valve body. A wedge extends between the extension and the shut-off valve, wedging the shut-off valve in a open position away from the valve seat. Extension and valve are separably joined together in that the extension includes a frangible portion which severs upon application of an impact force to pipe coupling. This allows the wedge to become dislodged, with the shut-off valve being urged in a position towards the valve seat.

Abstract: A valve arrangement includes a valve housing that defines a product passageway and a valve seat within the product passageway. A valve wedge is disposed within the housing passageway, and moves along a direction of operation between a closed position and an open position. A pair of opposed wings are carried on the valve wedge, adjacent a guide track. Rollers are carried on the wings for rolling engagement with the tracks and scraper blades are carried on the wings adjacent the rollers to scrape contamination from tracks.