Patent ID: 8608004
Filing Date: 2013-12-17
Classification: B05B,B65D,F16K,Y10T

Abstract:
1. A pressure relief valve (PRV) for relieving pressure in a tank, both upon over pressure conditions in the tank and when manually actuated, said PRV comprising a valve stem displaceable with respect to a seat for containing pressure in said tank when the valve stem is closed against said seat and for relieving pressure in said tank via a path through said valve stem providing a passageway for pressurized flow when said valve stem is displaced from a closed to an open position, said PRV also comprising a valve cap mounted on said seat and attached to said valve stem, said valve cap having a spout and a chamber communicating with said passageway the passageway for pressurized flow comprises a serpentine annular area in the vicinity of the valve cap and an opening in the spout, wherein the serpentine annular area is of much smaller size than the chamber and the opening in the spout, thereby substantially all of the pressurized flow is diverted out of the opening in the spout avoiding exposure to the pressurized flow and the possible toxic materials therein.