A regulator may include a fuel inlet from which a high-pressure fluid is introduced, a valve seat provided at the fuel inlet, and a pressure regulating valve body. The fluid may pass an opening between the valve seat and the pressure regulating valve body formed with a communication passage to a pressure regulating chamber provided to face a valve-seated seat arranged on the pressure regulating chamber side of the valve seat. A load generated by pressure of pressure-regulated fluid acting on a piston unit joined to the pressure regulating valve body may be balanced with a load by a pressure regulating spring in an atmosphere chamber provided coaxially in parallel with the pressure regulating chamber on an opposite side of the pressure regulating chamber of the piston unit. Fluid pressure of the pressure regulating chamber may be controlled by changing an opening area between the valve-seated seat and the pressure regulating valve body. The valve seat holding the valve-seated seat may be installed on an elastic member via a buffer having a sliding performance for automatic alignment to enable uniform contact between the pressure regulating valve body and valve-seated seat.

Embodiments described herein relate to a pressure-regulating device, systems that include the device, and related methods. For example, the pressure-regulating device may receive gas from a gas supply at a first pressure (e.g., on a supply side of the pressure-regulating device) and may regulate or reduce the pressure of the received gas to a selected or suitable second, different pressure.

Provided is a pressure control method for a high-pressure regulator to prevent internal leak, and the high-pressure shut-off valve so as to minimize an internal leak, due to high-pressure gas remaining in a high-pressure fuel line when a valve of a gas storage tank is shut off, caused by a pressure difference between a front end portion and a rear end portion of the high-pressure regulator introducing or discharging high-pressure gas. Accordingly, the convenience for connecting work is provided, the high safety is ensured, and the high-pressure regulator is used with the high reliability.

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.

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.

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.

A regulator may include a body part, a passage having a tubular shape and penetrating the body part, the passage including a first opening end serving as an introduction port for a high-pressure fluid and a second opening end serving as an outlet port for a decompressed fluid. The regulator may also include a valve seat unit including a valve seat on an inner side and a valve seat holding member including a through hole extending in an axial direction of the passage, a pressure regulating chamber disposed on an inner side of the introduction port in the passage through the valve seat unit, and a piston pressure regulating valve slidably biased in the axial direction of the passage between the pressure regulating chamber and the outlet port in the passage. The piston pressure regulating valve may include a pressure regulating valve element including a tip face capable of making intimate contact with the valve seat and a tubular communication passage with both ends open, and a piston part surrounding an outer periphery of the pressure regulating valve element on the outlet port side in the passage. The high-pressure fluid introduced through the introduction port may be introduced into the valve seat and the pressure regulating chamber facing the valve seat through the through hole formed on the valve seat holding member of the valve seat unit and taken out as the decompressed fluid from the outlet port through the communication passage of the pressure regulating valve element. The valve seat holding member may include a holding part that is a groove or a hole, the holding part including an opening exposed on the pressure regulating chamber side and an inner peripheral face having a larger diameter than the opening, the inner peripheral face being formed on at least a part of the holding part. The valve seat may include a locking body fitted into the holding part, and a valve seat main body joined and disposed along a side face of the valve seat holding member, the side face being located on the pressure regulating chamber side, and brought into intimate contact with the pressure regulating valve element, the locking body and the valve seat main body may be integrally formed, and the valve seat may be insert-molded into the valve seat holding member.

In a pressure reduction valve device, a valve body and a distal end portion of a support member are accommodated in a valve accommodation hole of a body. The distal end portion is inserted through an urging member accommodation hole. An inner introduction passage is formed between an outer peripheral surface of the distal end portion and an inner peripheral surface of the urging member accommodation hole. An outer introduction passage is formed between an outer surface of the valve body and an inner surface of the valve accommodation hole. The support member is provided with communication holes that establish communication between a gas inlet provided through the body and the valve accommodation hole in an axial direction. The inner introduction passage and the outer introduction passage are opposed, in an axial direction thereof, to the communication passage.

A pressure reducing valve includes a body, an annular valve seat, a valve element, and a pressing mechanism configured to press the valve element. The pressing mechanism includes a plug provided downstream of the valve seat and having a plug hole, and a pin including a sliding portion and an upstream end, the sliding portion having a shaft shape and being inserted in the plug hole such that a gap is provided between the sliding portion and an inner peripheral surface of the plug hole, and the upstream end being provided upstream of the sliding portion so as to contact the valve element. A fitting length of the sliding portion with respect to the plug hole and the gap between the sliding portion and the plug hole satisfy 0.0005 L<C<0.00908 L, where L indicates the fitting length, and C indicates the gap.

A one-gauge one-turn regulator manifold includes a manifold body, a spring set, a knob set, an annular dial and one inlet pressure gauge. The outlet pressure is selected and adjusted by turning a control knob without a pressure gauge. The control knob with a marker indicating the outlet pressure from zero to maximum is rotatable within one turn. The knob set contains one adjusting screw which is used to fine-tune the pressure, and thus the outlet air pressure is calibrated as expected. The annular dial with pressure tick marks is located between the control knob and the manifold body. The outlet pressure is easy to selected and controlled by turning the knob to the desired pressure makers on the dial without the pressure gauge.