A fuel system is provided that includes a fuel tank, a heat detector, and a control circuit. The digital heat detector is disposed in proximity to the fuel tank. The control circuit is coupled with the digital heat detector and is configured to detect that a thermal event has occurred. The fuel system is configured to implement an emergency countermeasure in response to the detection of the thermal event.

A water hammer-proof air valve that has a valve body and a bonnet, that are fixedly connected, a valve opening is provided on the valve body, and a high-speed intake and exhaust device is provided in an inner cavity of the valve body. A bonnet opening is provided on the bonnet, an output end of the high-speed intake and exhaust device penetrates the bonnet opening and is communicated with a high-speed exhaust throttling device for limiting an exhaust amount of gas of the high-speed intake and exhaust device, an output end of the high-speed exhaust throttling device is communicated with an outside air, and a trace exhaust device for discharging the gas separated out from the pipeline to the outside through the high-speed exhaust throttling device after the high-speed intake and exhaust device closes the valve is further provided in the high-speed intake and exhaust device.

A liquid leak detection and prevention device comprised of a leak detection apparatus positioned near a water-dependent appliance to monitor for moisture due to a leak, and a leak prevention system connected to the leak detection apparatus in fluid communication with a water pipe attached to the water-dependent appliance and positioned in-line with the water pipe is disclosed.

A trip cock valve for a brake system on a rail car includes a valve body that defines an inlet, a chamber downstream from the inlet, and an outlet downstream from the chamber. A piston is inside the chamber. A valve member operably connected to the piston has a first position that prevents fluid flow through the outlet and a second position that permits fluid flow through the outlet. A lever is operably engaged with the valve member to move the valve member from the first position to the second position. A valve position indicator downstream from the inlet is in fluid communication with the inlet when the valve member is in the second position.

A breakaway coupling includes a body and a valve assembly inside the body. The body includes a fluid conduit and a shear groove between first and second portions. The shear groove is designed to crack, break, or separate under certain conditions. The valve assembly is designed to shut off fluid flow through the fluid conduit when the shear groove cracks, breaks, or separates. The valve assembly includes a valve seat, a sealing element, one or more pins, and a biasing member. The one or more pins hold the sealing element in an open position while the shear groove is in tack, and allow the sealing element to move to a closed position (with the help of the biasing member) in the event the shear groove cracks, breaks, or separates.

A water leak detection and prevention device comprised of a leak detection apparatus positioned near a water-dependent appliance to monitor for moisture due to a leak, and a leak prevention system connected to the leak detection apparatus in fluid communication with a water pipe attached to the water-dependent appliance and positioned in-line with the water pipe is disclosed.

A pressure control valve for a vehicle is provided. The pressure control valve for a vehicle includes: a valve body having an oil inlet part into which oil discharged from a wheel cylinder flows; a driving part installed in the valve body; a plunger connected to the driving part and movably installed inside the valve body; a valve seat disposed inside the valve body and having an oil passage part formed such that the oil flowing into the oil inlet part is supplied to an accumulator; a first elastic member installed to apply an elastic force to the plunger such that the plunger returns to an original position; an opening and closing member installed in the oil passage part to open the oil passage part when the opening and closing member is pressed by the plunger; and a second elastic member applying an elastic force to the opening and closing member such that the opening and closing member closes the oil passage part.

An opening/closing apparatus for a fuel tank of a vehicle includes: a fuel passage forming portion; an insertion-side opening/closing valve mechanism; a fuel tank-side opening/closing valve mechanism; a liquid discharge path; and an opening/closing valve mechanism that opens and closes the liquid discharge port by a valve body disposed in the fuel passage forming portion, and that includes a moving body movable from a first position where a closing force exerts on the valve body to close the liquid discharge port to a second position where the closing force decreases, the moving body positioned at the first position in a state where the vehicle is stopped, and moving from the first position to the second position when receiving an inertial force due to traveling of the vehicle.

The present invention proposes a valve assembly for controlling a fluid to flow only in a certain direction according to inclination directions. A valve body 10 of the valve assembly includes a partition 14 formed with a through hole 14a and dividing an inside into a first internal channel 18a and a second internal channel 18b, a first entrance 12a for supplying a fluid from the first internal channel to an outside or a fluid from the outside to the first internal channel, and a second entrance 12b for supplying a fluid from the second internal channel to an outside or a fluid from the outside to the second internal channel. Further, a first check roller 11a and a second check roller 11b are in close contact with or separated from the through hole by buoyancy or sedimentation according to inclination directions of the valve body, thereby controlling the fluid to flow in a certain direction. Further, the first check roller and the second check roller are prevented from being in contact with the first entrance and the second entrance by the flow of the fluid in the first internal channel and the second internal channel, and the flow of the fluid is accurately controlled by only the inclination directions.

A pressure measuring system is provided in which a closing element supported in the pressure fitting channel is activated or displaced by a pressure surge or a pressure wave and thereby seals the channel to the measuring element and thus prevents an outflow of the fluid.