Magnetic quick action valve

A closure valve having an initially open position installable in a fluid conducting conduit for rapid closure of the conduit to fluid flow, said valve comprising:

• a valve housing having a valve seat,
• a closure member facing said valve seat,
• means acting on said closure member to hold the same initially open in spaced relation from said valve seat,
• closing means including permanent magnets for urging the closure member to move from the open position to a closed position and press the closure member against the valve seat in said closed position,
• sealing means operatively associated with said valve seat and said closure member for establishing a permanent sealed connection between the closure member and the valve seat with the closure member in closed position, thereby to oppose any future re-opening of the valve,
• said closing means comprising a first permanent magnet associated with said valve seat and a second permanent magnet associated with said closure member producing attraction forces urging the closure member towards the valve seat,
• said sealing means comprising a sealant which joins said closure member and said valve seat only after the closure member is closed and seated on the valve seat, and
• means actuable externally of the valve housing for initiating the closure of the valve by counteracting the effect of the means which initially holds the closure member open.