Hydrostatic Tank Floor Relief Valve

摘要

A hydrostatic tank floor relief valve of a construction described herein provides for equalization of hydrostatic pressure of fluid in a storage tank with hydrostatic pressure of ground water surrounding the storage tank. A high efficiency grate located in a flow channel of the hydrostatic tank floor relief valve blocks debris from entering the storage tank during pressure equalization, yet does not reduce effective flow rates through a flow channel of a given diameter. The hydrostatic tank floor relief valve optionally includes an elastomeric seal surface and a stainless steel seat ring that reduce the likelihood of particulate matter disrupting valve operation, and provide a more reliable seal.

主权项

1. A hydrostatic tank floor relief valve, comprising:
a) a hollow valve body with an inlet coupled to a first end of a pipe passing through a bottom of the tank, an outlet inside the tank, a flow channel between the inlet and the outlet, and a seat flange with a seat surface adjacent to the outlet; b) a valve cover at the outlet of the hollow valve body, the valve cover having a seal surface, movable from a closed position with the seal surface in contact with the seat surface of the seat flange, to an open position with the seal surface separated from the seat surface of the seat flange; and c) a grate mounted in the flow channel of the hollow valve body, having a plurality of apertures, each aperture of the plurality of apertures having an area, and a sum of the areas of the plurality of apertures being greater than or equal to a cross-sectional area of the pipe.