A regulator for hydrogen or other media can include a regulator body and an inlet into the regulator body. A first regulator stage can be downstream of the inlet and a second regulator stage can be downstream of the first regulator stage. An interstage passage can extend between the first and second regulator stages and an outlet from the regulator body can be downstream of the second regulator stage. The first regulator stage can include a first valve seat, a first valve stem, and a first sensor configured to transmit pressure force to urge the valve stem toward the valve seat. The second regulator stage can include a second valve seat, a second valve stem, and a second sensor configured to transmit pressure force to urge the second valve stem toward the second valve seat.

A medical device including an application device with a first fluid path and a container movably attached to the application device. The container and the application device have a second fluid path therethrough, the container includes an inner chamber that is intermediate proximal and distal portions of the second fluid path, the inner chamber is fluidly isolated from the proximal portion of the second fluid path at a first position of the container, and the inner chamber is fluidly coupled to the proximal and distal portions of the second fluid path at a second position of the container. The first fluid path bypasses the container and the passage of fluid through the first fluid path is separately controllable from the passage of fluid through the second fluid path.

A pressure relief valve includes a first port that receives a first gas at an input pressure, a second port that receive a second gas at a regulating pressure, a third port in communication with the first port via an orifice and that outputs the first gas at an output pressure and a piston movable along an axis and configured to control the passage of gas through the orifice between the first port and the second port, such that the output pressure of the gas is dependent on the axial position of the piston. The valve also in include a resilient member configured to bias the piston and the valve comprises a chamber at least partly defined by the piston and in fluid communication with the second port, such that the force exerted by the gas within the chamber on the piston acts against the action of the resilient member.

A pressure regulating and pressure relief valve, has a valve body defining an inlet port, outlet port, valve seat and pressure relief opening. A pressure regulating plug is displaced during a first portion of a motion from an open position, which provides a continuous flow path from the inlet port to the outlet port, to a closed position in which the plug is closed against the valve seat to obstruct the continuous flow path. A spring biases the plug to the open position. An actuation surface is exposed to a pressure at the outlet port that displaces the plug against the spring bias toward the closed position. Further displacement of the plug beyond the closed position during a second portion of the motion that is beyond a range of the first portion of the motion, opens a relief flow path from the outlet port through the pressure release opening.

A pressure regulator for controlling the flow of gas from a high pressure source to a low pressure device and regulating a pressure to the low pressure device includes a body having a high pressure inlet and a regulated pressure outlet. The body has a series of passages and bores including first and second regulator valve assembly bores and first and second fill valve assembly bores. The first and second regulator valve assembly bores are disposed on opposing sides of one of the passages and the first and second fill valve assembly bores are disposed on opposing sides of one of the passages. A regulator valve assembly includes a seal, a regulator valve piston, a biasing member and an adjusting plug positioned in the first regulator valve assembly bore, and a seal, a seat, a ball, a spring and a plug positioned in the second regulator valve assembly. A fill valve assembly includes a seal, a jam nut, a spring, a valve shaft, and a shaft actuator positioned in the first fill valve assembly bore and a seal, a seat, a ball, a spring and a plug positioned in the second fill valve assembly bore.

The present invention discloses a regulable pressure relief valve for a draft beer fresh-keeping keg, comprising a valve body housing, a first compression spring, a mushroom-shaped ejector rod, a second compression spring and a pressure exerting block. Said first compression spring, ejector rod, second compression spring and pressure exerting block are coaxially distributed; the ejector rod comprises a retractable rod and a mushroom head; the first compression spring is put on the retractable rod and the two ends of the first compression spring is stressed between the bottom of the mushroom head and the valve body housing; the two ends of the second compression spring is stressed between the top of the mushroom head and the pressure exerting block; a pressure regulation at the top of the retractable rod is realized by exerting a pressure on the pressure exerting block and thus realize the pressure regulation function.

An externally adjustable pressure regulator includes a body having a shoulder, a longitudinal axis and a high pressure inlet. The body has an opening along a side. A bonnet has a regulated pressure outlet and is engaged with the body. A piston is positioned in part in the body and the bonnet. The piston has a shoulder, a longitudinal bore and a transverse bore at about the end thereof in flow communication with the longitudinal bore. A spring is disposed on the piston. A wedging element is positioned in the opening in the body side and is in contact with the spring. An adjusting ring engages the wedging element to move it into the spring to increase compression of the spring and off of the spring to decrease compression. Increasing compression of the spring increases a spring force of the spring on the piston and decreasing compression of the spring decreases the spring force on the piston.

A pressure regulator includes a downstream body delimiting a low pressure chamber; an upstream body delimiting a high pressure chamber and carrying an expansion seat; a movable piston having an inner channel having an upper end forming a discharging seat and a lower end opening onto an intermediate chamber connected to a leakage circuit; a tubular valve rod passing through the inner channel of the piston and an inner channel of the upstream body, having an upper end forming a discharging valve and a lower end forming a regulating flap suitable for bearing on the expansion seat; a first biasing member compressed between the piston and the upstream body by biasing the piston towards the downstream body; and a second biasing member compressed between the piston and a plate secured to the valve rod, biasing the rod in the direction of pressing the discharging valve against the discharging seat.

An externally adjustable pressure regulator includes a body having a shoulder, a longitudinal axis and a high pressure inlet. The body has an opening along a side. A bonnet has a regulated pressure outlet and is engaged with the body. A piston is positioned in part in the body and the bonnet. The piston has a shoulder, a longitudinal bore and a transverse bore at about the end thereof in flow communication with the longitudinal bore. A spring is disposed on the piston. A wedging element is positioned in the opening in the body side and is in contact with the spring. An adjusting ring engages the wedging element to move it into the spring to increase compression of the spring and off of the spring to decrease compression. Increasing compression of the spring increases a spring force of the spring on the piston and decreasing compression of the spring decreases the spring force on the piston.

A pressure regulator for controlling the flow of gas from a high pressure source to a low pressure device and regulating a pressure to the low pressure device includes a body having a high pressure inlet and a regulated pressure outlet. The body has a series of passages and bores including first and second regulator valve assembly bores and first and second fill valve assembly bores. The first and second regulator valve assembly bores are disposed on opposing sides of one of the passages and the first and second fill valve assembly bores are disposed on opposing sides of one of the passages. A regulator valve assembly includes a seal, a regulator valve piston, a biasing member and an adjusting plug positioned in the first regulator valve assembly bore, and a seal, a seat, a ball, a spring and a plug positioned in the second regulator valve assembly. A fill valve assembly includes a seal, a jam nut, a spring, a valve shaft, and a shaft actuator positioned in the first fill valve assembly bore and a seal, a seat, a ball, a spring and a plug positioned in the second fill valve assembly bore.