The present disclosure provides an explosion-proof valve core, an explosion-proof valve, and a box body gas tightness detection clamp, including an explosion-proof valve core, a valve body, and sealing rings. The waterproof gas-permeable explosion-proof valve core of the present disclosure timely discharges high-temperature and high-pressure in a box body, which prevents explosion or reduces damage caused by explosion. An inner sealing ring in the explosion-proof valve is fixed through an inner sealing ring groove, so that a problem of poor sealing caused by easy falling and displacement of the inner sealing ring is solved. A metal protective shell is disposed on an outer side of an explosion-proof valve spring, a problem that the spring is blocked by battery core jets to weaken pressure relief performance when working is solved. The present disclosure further provides the box body gas tightness detection clamp, which is simple to use and operate.

An excess flow valve assembly includes a gas pipe, an excess flow valve and a collar crimped to an outside of a portion of the gas pipe, the crimped collar compressing the portion of the gas pipe creating a positive stop for the excess flow valve when the excess flow valve is inserted in the gas pipe.

An excess flow valve assembly includes a gas pipe, an excess flow valve and a collar crimped to an outside of a portion of the gas pipe, the crimped collar compressing the portion of the gas pipe creating a positive stop for the excess flow valve when the excess flow valve is inserted in the gas pipe.

A self-acting pressure activated drain valve includes at least one inlet configured to receive a fluid. A drainage passage delivers the fluid to at least one outlet where the fluid is expelled. The self-acting pressure activated drain valve further includes a flexible diaphragm configured to operate in an open position and a closed position based on a pressure. The flexible diaphragm is normally biased in the open position such that fluid is delivered from the at least one inlet to the at least one outlet via the drainage passage. The pressure, however, initiates the closed position such that air is prevented from flowing through the drainage passage.

A self-acting pressure activated drain valve includes at least one inlet configured to receive a fluid. A drainage passage delivers the fluid to at least one outlet where the fluid is expelled. The self-acting pressure activated drain valve further includes a flexible diaphragm configured to operate in an open position and a closed position based on a pressure. The flexible diaphragm is normally biased in the open position such that fluid is delivered from the at least one inlet to the at least one outlet via the drainage passage. The pressure, however, initiates the closed position such that air is prevented from flowing through the drainage passage.

An aspirator may comprise an aspirator body defining an air channel, an aspirator inlet disposed in the aspirator body whereby the air channel receives a compressed fluid, a venting aperture disposed in the aspirator body in fluid communication with the air channel, and a venting valve disposed in the venting aperture. The venting valve is in an open position and the venting valve moves to a closed position in response to the compressed fluid being received by the aspirator.

A distributed fuel module includes a fuel pressure vessel with a gas port and a fuel port, a hydraulic circuit breaker connected to the fuel port, and a gaseous circuit breaker. The gaseous circuit breaker is connected to the gas port, is fluidly coupled to the hydraulic circuit breaker through the fuel pressure vessel, and is cooperatively associated with the gaseous circuit breaker to isolate the fuel pressure vessel from a compressed gas header and a fuel header according to pressure differential within the hydraulic circuit breaker and pressure differential within the gaseous circuit breaker. Power modules and methods of controlling fuel flow in fuel modules are also described.

A distributed fuel module includes a fuel pressure vessel with a gas port and a fuel port, a hydraulic circuit breaker connected to the fuel port, and a gaseous circuit breaker. The gaseous circuit breaker is connected to the gas port, is fluidly coupled to the hydraulic circuit breaker through the fuel pressure vessel, and is cooperatively associated with the gaseous circuit breaker to isolate the fuel pressure vessel from a compressed gas header and a fuel header according to pressure differential within the hydraulic circuit breaker and pressure differential within the gaseous circuit breaker. Power modules and methods of controlling fuel flow in fuel modules are also described.

A valve body has an outside surface and a cylinder. The cylinder has an inlet chamber and an outlet chamber. A piston has a head at one end and a foot at the end opposite the head and a piston body between the head and the foot. A cross channel extends from a first side of the piston body. A longitudinal channel is in fluid communication with the cross channel and extends to the outlet chamber. The piston is positioned in the cylinder so that it can be moved to an open position in which the cross channel is in fluid communication with the inlet chamber and a closed position in which the cross channel is not in fluid communication with the inlet chamber. The piston is actuated between the two positions by a differential in pressure between the inlet chamber and the outlet chamber.

A valve body has an outside surface and a cylinder. The cylinder has an inlet chamber and an outlet chamber. A piston has a head at one end and a foot at the end opposite the head and a piston body between the head and the foot. A cross channel extends from a first side of the piston body. A longitudinal channel is in fluid communication with the cross channel and extends to the outlet chamber. The piston is positioned in the cylinder so that it can be moved to an open position in which the cross channel is in fluid communication with the inlet chamber and a closed position in which the cross channel is not in fluid communication with the inlet chamber. The piston is actuated between the two positions by a differential in pressure between the inlet chamber and the outlet chamber.