Vapor Shear Valve [1]
A fitting installed in the vapor piping at the base of a dispenser [2] that is designed to “shear” or break off if the dispenser cabinet is dislodged from its base. The vapor shear valve may incorporate a test port that can be used to introduce nitrogen or a product into the vapor piping.
The vapor shear valve may also include poppets [3] that cap off the vapor piping to the tank [4] and the vapor piping in the dispenser when the shear section separates.
See also PEI/RP300 [5].