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1. WO2020223513 - LOW-PRESSURE SHUT-OFF VALVE AND SYSTEM

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[ EN ]

CLAIMS

What is claimed is:

1. A pressurized-gas low-pressure detection and shut-off system, comprising:

a low-pressure shut-off valve including a first valve inlet, a second valve inlet and at least one valve outlet;

a solenoid valve including a valve inlet, a first valve outlet, and a second valve outlet, the second valve outlet connected to and in fluid communication with the first valve inlet of the low-pressure shut-off valve, the solenoid valve configured to direct a flow of a pressurized gas from the valve inlet into at least one of the first valve outlet and the second valve outlet; and

a gas monitor electrically coupled to the solenoid valve, wherein the gas monitor is configured to transmit one of a first signal and a second signal to the solenoid valve to control the flow of the pressurized gas through the solenoid valve.

2. The pressurized-gas low-pressure detection and shut-off system of claim 1, wherein the first signal from the gas monitor is configured to control the solenoid valve to direct the flow of the pressurized gas through the first valve outlet of the solenoid valve.

3. The pressurized-gas low-pressure detection and shut-off system of claim 1, wherein the second signal from the gas monitor is configured to control the solenoid valve to direct the flow of the pressurized gas through the second valve outlet of the solenoid valve and into the first valve inlet of the low-pressure shut-off valve.

4. The pressurized-gas low-pressure detection and shut-off system of claim 1, wherein the gas monitor is configured to detect one of a normal amount of C02 in an area

surrounding the gas monitor and an elevated amount of C02 in the area surrounding the gas monitor.

5. The pressurized-gas low-pressure detection and shut-off system of claim 4, wherein the gas monitor is configured to transmit the first signal when the normal amount of C02 is detected in the area surrounding the gas monitor.

6. The pressurized-gas low-pressure detection and shut-off system of claim 4, wherein the gas monitor is configured to transmit the second signal when the elevated amount of C02 is detected in the area surrounding the gas monitor.

7. A pressurized-fluid low-pressure detection and shut-off system, comprising:

a low-pressure shut-off valve including:

a first shut-off inlet;

a second shut-off inlet configured to receive pressurized fluid from a pressurized fluid source; and

a shut-off outlet configured to provide the pressurized fluid to a pressurized-fluid consuming device;

a solenoid valve including:

a solenoid inlet configured to receive the pressurized fluid; and

a solenoid outlet configured to fluidly connect to the first shut-off inlet of the low- pressure shut-off valve, wherein the solenoid valve is configured to selectively permit fluid flow direct the pressurized fluid from the solenoid inlet to the solenoid outlet; and a gas monitor electrically coupled to the solenoid valve, wherein the gas monitor is configured to transmit one of a first signal and a second signal to the solenoid valve to control the flow of the pressurized fluid to the pressurized-fluid consuming device via the shut-off valve.

8. The pressurized-fluid low-pressure detection and shut-off system of claim 7, wherein the solenoid inlet is configured to fluid connect to the pressurized fluid source via a fluid pathway external to the low-pressure shut-off valve to receive the pressurized fluid.

9. The pressurized-fluid low-pressure detection and shut-off system of claim 7, wherein the low-pressure shut-off valve includes a second shut-off outlet fluidly that is fluidly connected to the second shut-off inlet and is configured to fluidly connect to the solenoid inlet to provide the pressurized fluid to the solenoid valve.

10. The pressurized-fluid low-pressure detection and shut-off system of claim 7, wherein the solenoid valve is a normally-closed 3-way solenoid valve and includes a second solenoid outlet that defines a relief port.

11. The pressurized-fluid low-pressure detection and shut-off system of claim 7, wherein the pressurized fluid is pressurized C02 and the gas monitor is configured to collect a C02 measurement of C02 in an area surrounding the gas monitor.

12. The pressurized-fluid low-pressure detection and shut-off system of claim 11, wherein, in response to determining that the C02 measurement is less than a predefined C02 threshold, the gas monitor is configured to transmit the first signal to the solenoid valve.

13. The pressurized-fluid low-pressure detection and shut-off system of claim 12, wherein, in response to receiving the first signal, the solenoid valve is configured to close the solenoid inlet to prevent the solenoid outlet of the solenoid valve from providing the pressurized fluid to the first shut-off inlet of the low-pressure shut-off valve.

14. The pressurized-fluid low-pressure detection and shut-off system of claim 12, wherein, in response to determining that the C02 measurement is greater than or equal to the predefined C02 threshold, the gas monitor is configured to transmit the second signal to the solenoid valve.

15. The pressurized-fluid low-pressure detection and shut-off system of claim 14, wherein, in response to receiving the second signal, the solenoid valve is configured to open fluid flow between the solenoid inlet and the solenoid outlet to cause the solenoid outlet to provide the pressurized fluid to the first shut-off inlet of the low-pressure shut-off valve.

16. The pressurized-fluid low-pressure detection and shut-off system of claim 7, wherein the solenoid valve is configured to prevent the shut-off valve from providing the pressurized fluid to the pressurized-fluid consuming device when the solenoid inlet is closed from the solenoid outlet.

17. The pressurized-fluid low-pressure detection and shut-off system of claim 16, wherein the solenoid valve is configured to permit the shut-off valve to provide the pressurized fluid to the pressurized-fluid consuming device when the solenoid inlet is in fluid communication with the solenoid outlet.

18. The pressurized-fluid low-pressure detection and shut-off system of claim 7, wherein the low-pressure shut-off valve further includes a piston, a seat disc diaphragm connected to the piston, and a spring biasing the piston, wherein the spring and the first shut-off inlet is located on a first side of the piston and the first shut-off inlet are located on a first side of the piston, wherein the second shut-off inlet is located on an opposing second side of the piston.

19. The pressurized-fluid low-pressure detection and shut-off system of claim 18, wherein when the solenoid outlet of the solenoid valve provides the pressurized fluid to the first shut-off inlet of the low-pressure shut-off valve, pressure is equalized between the first side and the second side of the piston to cause the spring to close the seat disc diaphragm connected to the piston and prevent the shut-off outlet from providing the pressurized fluid to the pressurized-fluid consuming device.

20. The pressurized-fluid low-pressure detection and shut-off system of claim 18, wherein, when the solenoid valve prevents the solenoid outlet from providing the pressurized fluid to the first shut-off inlet of the low-pressure shut-off valve, the seat disc diaphragm connected to the piston is configured to open in response to pressure on the first side of the piston exceeding a predefined pressure threshold associated with a biasing force of the spring, wherein the shut-off outlet is configured to provide the pressurized fluid to the pressurized-fluid consuming device when the seat disc diaphragm of the shut-off valve is open.