A pressure relief valve system has a fluid outlet (1) from a pressure vessel; a flexible expansion piece (4) at an end of the fluid outlet remote from the pressure vessel; a primary pressure relief valve has a valve seat and a valve lid (7). The valve seat has a flange (5) mounted on the expansion piece and the valve lid forms a valve seal with the flange. A fluid off-take (13) is connected to the fluid outlet (1) and a secondary pressure relief valve (11) receives fluid from the fluid off-take. The secondary pressure relief valve has an outlet (12) coupled to a valve opening actuator (15), whereby passage of fluid through the secondary pressure relief valve (11) causes the opening actuator to operate to open the valve lid (7).

A pressure relief valve system has a fluid outlet (1) from a pressure vessel; a flexible expansion piece (4) at an end of the fluid outlet remote from the pressure vessel; a primary pressure relief valve has a valve seat and a valve lid (7). The valve seat has a flange (5) mounted on the expansion piece and the valve lid forms a valve seal with the flange. A fluid off-take (13) is connected to the fluid outlet (1) and a secondary pressure relief valve (11) receives fluid from the fluid off-take. The secondary pressure relief valve has an outlet (12) coupled to a valve opening actuator (15), whereby passage of fluid through the secondary pressure relief valve (11) causes the opening actuator to operate to open the valve lid (7).

A valve assembly configured for use with an inflatable product, such as a mattress, chair, pool, spa, float, or another suitable inflatable product. The valve assembly includes a first valve component that serves as an opening for inflation and/or deflation of the inflatable product, and a second valve component that serves as an opening for deflation or decompression of the inflatable product.

A valve assembly configured for use with an inflatable product, such as a mattress, chair, pool, spa, float, or another suitable inflatable product. The valve assembly includes a first valve component that serves as an opening for inflation and/or deflation of the inflatable product, and a second valve component that serves as an opening for deflation or decompression of the inflatable product.

A cap for closing an opening of a receptacle such as for a liquefied natural gas container. The cap includes a main body and a sealing surface for sealing the opening of the receptacle. A lock/release mechanism is provided to lock the cap onto the receptacle, or enable the cap to be removed from the receptacle. A relief valve of the cap is activatable to relieve pressure within the receptacle. A grip overlies the main body and a relief valve actuator, enabling a user to activate the relief valve via the grip. The cap is configured to relieve pressure in a first stage of removal, and then unlock from the receptacle in a second stage of removal. A catch and secondary pressure relief features are provided to control removal of the cap. Magnets may be provided for proximity sensors to indicate proper closure of the cap on the receptacle.

A cap for closing an opening of a receptacle such as for a liquefied natural gas container. The cap includes a main body and a sealing surface for sealing the opening of the receptacle. A lock/release mechanism is provided to lock the cap onto the receptacle, or enable the cap to be removed from the receptacle. A relief valve of the cap is activatable to relieve pressure within the receptacle. A grip overlies the main body and a relief valve actuator, enabling a user to activate the relief valve via the grip. The cap is configured to relieve pressure in a first stage of removal, and then unlock from the receptacle in a second stage of removal. A catch and secondary pressure relief features are provided to control removal of the cap. Magnets may be provided for proximity sensors to indicate proper closure of the cap on the receptacle.

A sub-machine of a soda fountain with an adjustable exhaust velocity includes a main body, a water bottle connector, a housing, a taper ring, a bottom cover, a positioning seat, an air inlet assembly, an air nozzle rod, an exhaust valve, a soda bottle, a connecting seat, an exhaust knob and key, the connecting seat covers an upper opening of an exhaust valve cavity, the valve rod passes through a guide hole a lower surface of the exhaust key is attached to a flat seat plate part; a circular body part extends into an arc-shaped part, the exhaust key is nested into an exhaust key cavity, and a handle part extends out from a guide notch; the exhaust key is in sliding fit with an inclined surface part. Due to this structure, the handle part is operated to rotate the exhaust knob, so as to perform exhaust and adjust the exhaust velocity.

A gas pressure balance valve includes a valve body, a one-way valve and a buffer assembly. The valve body includes a gas inlet end and a gas outlet end, the gas inlet end is connected with a first gas pressure area, the gas outlet end is connected with a second gas pressure area, and a pressure difference is existed between the first gas pressure area and the second gas pressure area. The one-way valve is located in the valve body, and configured to achieve the balance between the pressures of the first gas pressure area and the second gas pressure area. The buffer assembly is located between the gas inlet end and the one-way valve, and configured to adjust the pressure on the surface of the one-way valve.

A gas pressure balance valve includes a valve body, a one-way valve and a buffer assembly. The valve body includes a gas inlet end and a gas outlet end, the gas inlet end is connected with a first gas pressure area, the gas outlet end is connected with a second gas pressure area, and a pressure difference is existed between the first gas pressure area and the second gas pressure area. The one-way valve is located in the valve body, and configured to achieve the balance between the pressures of the first gas pressure area and the second gas pressure area. The buffer assembly is located between the gas inlet end and the one-way valve, and configured to adjust the pressure on the surface of the one-way valve.

A check valve assembly for use with a liquid jet cutting system can include a check valve body a high-pressure fluid inlet on one end and a high-pressure fluid outlet on the other end along a central axis of the check valve body. The check valve body can have a first metallic seal surface on an outer surface of the check valve shaped to engage an endcap of the liquid jet cutting system to form a first seal. The assembly can include an annular low-pressure fluid chamber surrounding a portion of the check valve body and defined at least in part by an annular gasket, the check valve body, the first seal, and the endcap. The check valve body can include a low-pressure fluid channel, and a check valve positioned between the low-pressure fluid channel and a high-pressure fluid chamber.