Patent ID: 8997777
Filing Date: 2015-04-07
Classification: A62C,E03B,E03C,Y10T

Abstract:
1. A dry-barrel fire hydrant valve, comprising: a valve body, comprising: one or more barrel drains integrated within the valve body, each drain comprising a ball within a tube, the tube having a narrower diameter at its ends than in its middle portion, and the ball having a specific gravity somewhat higher than that of the surrounding fluid, wherein the valve is opened by a user causing the moveable retaining screen to rise, allowing the ball to be pushed upwards by fluid pressure, and closed by causing said retaining screen to push the ball downward and seal on the ball seat; wherein the ball is caged between the retaining screen and the ball seat, the ball has a specific weight slightly greater than the specific weight of a fluid to be sent through the valve, wherein, when the said retaining screen is raised: in forward flow the ball is held in a position adjacent to the retaining screen such that forward fluid flow is facilitated, and in backwards flow the ball seals in the ball seat, thus preventing backflow.