Gas discriminating valve for shutting off excessive flow of liquids

A valve used for passage of a liquid, gas or a mixture of gas and liquid which valve shuts off during excess flow of liquid only, wherein the valve maintains an open position in the instance of flow of gas or mixture of gas and liquid, wherein the valve maintains an open position in the instance of normal flow of the liquid, the valve comprising:

• a ball having a diameter and weight;
• a ball holder having a lower portion with an inlet orifice being defined therein and a circumferential side wall with at least one or more circumferential apertures being defined in the circumferential side wall and partially shielding the ball to meter flow of fluid through the circumferential side wall impinging on the ball, the inlet orifice having an area, the circumferential apertures each having an area, the ball holder having a height, wherein the ball sits inside the ball holder as a result of gravity absent any flow of material;
• a seal in which an outlet orifice is defined, the outlet orifice having a diameter less than the diameter of the ball, the seal being disposed on top of the ball holder;
• and
• a main body having a circumferential side wall and at least one inlet port,
• wherein an annulus is defined as a fully circumferential space between the circumferential side wall of the main body and the ball holder,
• wherein the ball holder with the ball is disposed within the main body,
• wherein the diameter and weight of the ball, the area of the inlet orifice being sized be less than the diameter of the ball to therefore act as a metering orifice for flow of fluid impinging on the ball, the areas of the circumferential apertures, and the height of the ball holder are all defined within a range in proportion to one another such that excessive flow of the liquid beyond a predetermined magnitude selectively effects a shut-off position of the ball with respect to the seal,
• wherein the liquid, gas and mixtures thereof entering the valve first enter the main body through the at least one inlet port, whereby the main body restricts all of the materials traveling through the valve to enter the ball holder, whereby liquid, gas and mixtures thereof enter the ball holder through the inlet orifice and through the circumferential apertures, the liquid, gas and mixtures thereof having an inlet orifice flow and a circumferential aperture flow,
• wherein once the liquid enters through the circumferential apertures, the circumferential apertures create a resistance on the liquid, the resistance causing the liquid to enter through the inlet orifice, the resistance increasing with increased flow of the liquid through the circumferential aperture,
• wherein once the circumferential aperture flow of the liquid exceeds a predetermined level, the resistance caused by the circumferential apertures will force the liquid to flow through the inlet orifice at a rate high enough to lift the ball upwards to a height at which the circumferential aperture flow of the liquid carries the ball to the outlet aperture of the conduit, and
• wherein the circumferential aperture flow of the liquid will cause the ball to close the outlet orifice to prevent further exit of the liquid from the valve.

A valve to be used in connection with an irrigation system to shut off only during excess flow of water through the valve, wherein the valve will maintain an open position in the instance of flow of air or water during start-up of the system, and wherein the valve will maintain an open position in the instance of normal flow of water, the valve comprising:

• a ball having a diameter and weight;
• a ball holder having a lower portion with an inlet orifice being defined in the lower portion with an area less than a cross-sectional area of the ball to meter flow of fluid through the inlet orifice which impinges on the ball and a circumferential side wall with at least one or more circumferential apertures being defined in the circumferential side wall and partially shielding the ball to meter flow of fluid through the circumferential side wall impinging on the ball, the inlet orifice having an area, the circumferential apertures each having an area, the ball holder having a height, wherein the ball sits inside the ball holder as a result of gravity absent any flow of air or water;
• a seal disposed on top of the ball holder with an outlet orifice defined in the seal, the outlet orifice having a diameter less than the diameter of the ball;
• and
• a main body having a circumferential side wall and at least one inlet port, wherein the ball holder with the ball is disposed within the main body and an annulus is defined as a fully circumferential space between the circumferential side wall of the main body and the ball holder,
• wherein the diameter and weight of the ball, the area of the inlet orifice, the areas of the circumferential apertures, and the position of the circumferential apertures in the side wall are all defined within a range in proportion to one another such that excessive flow of water beyond a predetermined magnitude selectively effects a shut-off position,
• whereby the air or water entering the valve first enters the main body through the at least one inlet port, whereby the main body restricts all of the air or water traveling through the valve to enter the ball holder, whereby the air or water enters the ball holder through the inlet orifice and through the circumferential apertures, the air or water having an inlet orifice flow and a circumferential aperture flow,
• whereby once water enters through the circumferential apertures, the circumferential apertures create a resistance on the water, the resistance causing the water to enter through the inlet orifice, the resistance increasing with increased flow of the water through the circumferential aperture,
• whereby once the circumferential aperture flow of the water exceeds a predetermined level, the resistance caused by the circumferential apertures will force the water to flow through the inlet orifice at a rate high enough to lift the ball upwards to a height at which the circumferential aperture flow of the water carries the ball to the outlet orifice of the seal,
• whereby the circumferential aperture flow of the water will cause the ball to close the outlet orifice to prevent further exit of the water from the valve.

A method of shutting off excess flow of materials in liquid only state through a conduit comprising:

• providing a valve with an inlet port, a ball, and a surface with an outlet orifice defined in the surface;
• disposing the surface with the outlet orifice defined therein above the ball as defined by the direction of gravity;
• providing a ball holder with an inlet orifice and circumferential apertures;
• seating the ball inside the ball holder by action of gravity;
• partially shielding the ball to meter flow of fluid through the circumferential apertures which impinges on the ball;
• providing a main body;
• disposing the ball holder within the main body such that an annulus is formed as a fully circumferential space between the ball holder and the main body;
• passing materials in a liquid state, gas state, or in states of liquid and gas, through the inlet port of the valve;
• directing all materials in the main body to flow through the ball holder;
• flowing the materials through the inlet orifice and circumferential apertures of the ball holder, the inlet orifice having an area which meters flow of fluid impinging on the ball flowing through the inlet orifice;
• flowing the materials to contact the ball wherein the contact between the ball and the materials maintains an open configuration of the ball to permit flow of the materials through the valve;
• flowing the materials in a liquid only state above a predetermined flow rate to contact the ball, wherein the contact between the ball and the liquid materials displaces the ball to a closed configuration to seal the outlet orifice with the ball.