Abstract: A gas circulation apparatus is applied to a pneumatic apparatus including a solenoid valve apparatus and a cylinder apparatus, and is connected in series between the solenoid valve apparatus and the cylinder apparatus. The gas circulation apparatus includes a valve core structure, a first circulation cavity, and a second circulation cavity. The valve core structure is configured to move in a first direction, so that compressed gas discharged from a first cylinder cavity of the cylinder apparatus and passing through the solenoid valve apparatus is collected and stored by the first circulation cavity, and a second cylinder cavity of the cylinder apparatus is supplied with compressed gas stored in the second circulation cavity together with the compressed gas supplied from the solenoid valve apparatus.

Abstract: A receptacle includes a main body, a stem, a poppet connected to the stem and defining an inner check void, a spring configured to bias the poppet to a closed poppet position, and a check assembly at least partially disposed in the inner check void. The check assembly includes a check and a check spring. The check is configured to move relative to the main body. The check spring is configured to bias the check toward a closed check position. The check has a first surface area and the poppet has a second surface area that is larger than the first surface area of the poppet such that a fluid force causes the check to move to an open check position before causing the poppet to move to an open poppet position.

Abstract: A pre-charged pneumatic air gun includes a barrel, a firing valve, a trigger assembly, a compressed gas storage tank, a first chamber, a larger second chamber and a compression piston movable within the first chamber and the second chamber. The compression piston is operable to increase a pressure in the first chamber to a final first chamber pressure greater than an initial first chamber pressure by sequentially opening a first fill valve with the second fill valve closed to allow compressed gas to flow into the first chamber then opening a second fill valve to allow the compressed gas to flow into the second chamber, thereby displacing the compression piston and further compressing the compressed gas in the first chamber to achieve the final first chamber pressure.

Abstract: A CO2 low-pressure shut-off system is described. The low-pressure shut-off system may include a low-pressure shut-off valve including a first valve inlet, a second valve inlet and at least one valve outlet, a solenoid valve including a valve inlet, a first valve outlet, and a second valve outlet. The solenoid may be configured to direct a flow of a pressurized gas from the valve inlet into at least one of the first valve outlet and the second valve outlet. The CO2 low-pressure shut-off system further includes a gas monitor electrically coupled to the solenoid valve. The gas monitor may be configured to transmit one of a first signal and a second signal to the solenoid valve to control the flow of the pressurized gas through the solenoid valve.

Abstract: A pressure regulator for gas distribution systems includes: a connection body for connection between an upstream pipe and a downstream pipe, the following elements being defined inside the connection body: an inlet duct an outlet duct, a high-pressure chamber connected to the inlet duct, a low-pressure chamber connected to the outlet duct, a passage opening between the high-pressure chamber and the low-pressure chamber, a movable shutter designed to obstruct the passage opening, components for moving the movable shutter in a controlled manner. The components for moving the movable shutter in a controlled manner include: a first main control head fixed to the connection body and configured to operate the movable shutter through a first control rod, a second auxiliary control head configured to operate the movable shutter through a second control rod fixed to the same movable shutter.

Abstract: A system includes a first pressure-adjusting device positioned in a first line and a second pressure-adjusting device positioned in a second line. The first pressure-adjusting device is actuated solely via a first pneumatic signal output from a first pilot valve to control a downstream pressure in the first line. The second pressure-adjusting device is actuated via the first pneumatic signal in a first mode of operation, and is actuated via a second pneumatic signal output from a second pilot valve in a second mode of operation to control a downstream pressure in the second line.

Abstract: A method and arrangement for maintaining fluid flow pressure in a system at a preset, almost constant level. A method for maintaining fluid flow pressure almost constant regardless of mass flow. The arrangement including a pressure accumulator, and a nozzle valve. The nozzle valve having a valve body and axially oriented needle for opening and closing the mouth of its outflow channel. The needle shaft guided by a slide element mounted inside the valve body. The inflow into the flow body passes to the other side of the slide element through one or several channels. The needle moves axially to open and close the channel because of the forces acting upon it. Forces acting upon it may include the accumulator, the inflow and a spring. The needle's movement adjust the cross-sectional area of the outflow channel mouth not disposed by the needle head to maintain an almost constant pressure.

Abstract: System and method for gas pressure stabilization. The system comprises a pressure stabilizer which is divided into a receiving chamber and a pressure chamber by a flexible membrane, a booster device, a gas divider, and a control driver that can sense movement of the flexible membrane and control the gas divider accordingly. A pressure pilot is used to set the desired pressure in the pressure chamber. The pressure of the receiving chamber will stabilize to be the same with that of the pressure chamber regardless of the gas flow change or gas pressure change at the gas source, or the pressure fluctuation in the downstream system. The gas passing the system can eventually be recycled to a recycling system in the downstream without harming the environment.

Abstract: Diaphragm actuators having adjustable actuation force are disclosed herein. An example apparatus includes a spring seat coupled to a diaphragm of an actuator. The spring seat is to contact a spring and is to be coupled to a stem. The diaphragm is to displace the stem based on a force provided to the diaphragm, and the stem is to control a fluid valve. The example apparatus also includes an adjuster to adjust an amount of force provided to the spring seat by the spring.

Abstract: The present disclosure provides a spring controlled valve including a spring being movable between an expanded position wherein coils of the spring are spaced apart from one another thereby permitting gas flow through the valve and a compressed position wherein the coils are in contact with one another thereby substantially preventing gas flow through the valve.

Abstract: A pilot device cooperates with a gas pressure regulator suitable for use in gas distribution systems and consists of: a head with two chambers separated by a first membrane, one chamber at the gas pressure regulator outlet pressure and the other at atmospheric pressure; a body with elastic means and an axial thrust unit acting on the first membrane and cooperating with a regulation unit having at the inlet a supply pressure and at the outlet the motorization gas which is transferred to the motorization chamber of the gas pressure regulator. The pilot device features a tank having a wall with a further membrane provided with the mechanical elastic setting means. Gas is conveyed into the tank with a load pressure to modify the thrust of the elastic setting means. The device has a closed compensation chamber at atmospheric pressure, having the further membrane in common with the tank.

Abstract: A self-operated pressure transmission type of pressure reducing valve with corrugated pipe has an upper cover, a cylinder, a lower cover, a sealing board, a sealing sleeve, a first and second nut, and an upper valve rod. The pressure reducing valve needs no external driving force. It only needs a power-saving product which can automatically adjust the pressure according to the pressure change of the adjusted object. It has multiple functions such as measuring, implementing and controlling pressure, and it solves the problems in the operation process of the conventional pressure reducing valve.

Abstract: A regulator insert for valves includes inflow openings and a plurality of slot-shaped outflow openings extending in the axial direction of the insert and being, via a roller membrane, closable in response to the difference in pressure across the insert under the influence of a spring that seeks to keep the outflow openings open. The slot-shaped outflow openings have at least two different lengths, whereby complete closure of at least some of the outflow openings can take place only consecutively. At least one of the slot shaped outflow openings has such length that complete closure thereof by means of the roller membrane is not possible.

Abstract: Pressure reducer for compressed gases, comprising at least one regulation stage constituted by a chamber divided by a first membrane (25) into two chambers (23, 24), one of which said chambers (24) is maintained at a reference pressure and the other (23) at a pressure which depends on the gas pressure in the outlet pipe (3), an opening, closed by a membrane (43) integral with a cap (42), located between the said chamber (24) at the reference pressure and the said gas outlet pipe (3), a gas inlet chamber (10) with an opening (11) which leads to the said outlet pipe (3) in correspondence with the said cap (42), the movements of which said cap open and close the passage (11) between the said inlet chamber (10) and the said outlet pipe (3), and means (41) integral with the said first membrane (25) which act on the said cap (42) so that it approaches and retracts from opening (11) of the said gas inlet chamber.