Abstract: A valve for dispensing moisture reactive liquids is disclosed. The valve has a valve cup for tightly closing a container including a through opening, and a first annular fold forming a groove in a first, inner surface and a rib in a second, outer surface. The valve includes a resilient grommet and a valve stem. The valve stem includes a hollow tubular portion, defining a central bore snugly fitting in the grommet central bore and extending on both sides of the grommet with a first end opening to ambient and a second, opposite end being closed by a circular end base greater than the diameter of the bore of the grommet. The upper surface of the flange portion of the grommet mates with the first, inner surface of the cup including the portion of the grommet mating the groove formed by the fold.

Abstract: A valve for dispensing moisture reactive liquids is disclosed. The valve has a valve cup for tightly closing a container including a through opening, and a first annular fold forming a groove in a first, inner surface and a rib in a second, outer surface. The valve includes a resilient grommet and a valve stem. The valve stem includes a hollow tubular portion, defining a central bore snugly fitting in the grommet central bore and extending on both sides of the grommet with a first end opening to ambient and a second, opposite end being closed by a circular end base greater than the diameter of the bore of the grommet. The upper surface of the flange portion of the grommet mates with the first, inner surface of the cup including the portion of the grommet mating the groove formed by the fold.

Abstract: The invention concerns an improvement to the design of a tilting/gun valve, more particularly regarding the problem of sticking/blocking. The valve comprises a cup (5), a stem (10) with an enlarged circular base (21) end extending perpendicularly and, therebetween, a grommet (22) made of an elastomer polymer. The grommet (22) is provided with a flat lower surface extending essentially on all the flat upper surface of the enlarged base of the stem to secure the sealing effect. The grommet (22) height H below the cup is less than 4 mm.