A vent valve opens to provide a fluid path from a regulated pressure port to a vent port, a supply valve opens to provide a fluid path from the regulated pressure port to a supply pressure port. A control piston has a linear cam profile with a vent cam that opens the vent valve and a supply cam that opens the supply pressure valve.

A device for controlling the flow of a fluid through a conduit from an upstream side of the device to a downstream side of the device is provided. The device includes an upstream valve casing defining an inlet, a downstream valve casing defining an outlet aperture, and a valve core secured between the upstream valve casing and the downstream valve casing. The upstream valve casing, the downstream valve casing and the valve core are formed as discrete parts. The valve core includes a housing defining a control volume. The valve member is mounted on the housing and positioned on the upstream side of the outlet aperture, the valve member being arranged to move reciprocally to selectively open and close the outlet aperture, thereby controlling flow of the fluid through the outlet aperture.

A valve assembly is provided. The valve assembly includes a valve body defining a bore. The valve assembly further includes a pull rod disposed in the bore and defining a bolt cavity. The pull rod is moveable between a first pull rod position and a second pull rod position. The valve assembly further includes a bolt disposed in the bolt cavity and moveable with respect to the pull rod between a first bolt position and a second bolt position. The valve assembly further includes a spool disposed in the bore. The spool is operatively coupled to the pull rod to move between an energized position and a neutral position.

A fluidic device for supplying working fluid includes: a fluid line for the flow of the working fluid; a pressure regulator adapted to reduce the pressure of the working fluid from the upstream pressure to a downstream pressure; a valve adapted to be pressure-controlled for opening or closing, depending on whether a pressure exerted on its valve head is substantially equal to the upstream pressure or to the downstream pressure; a distributor including a first opening connected to an upstream side of the pressure regulator, a second opening downstream of the pressure regulator, and a control opening connected to the valve head. The distributor is adapted to cause the opening or closing of the valve, depending on whether the control opening is connected to the first opening or to the second opening.

A process control valve manufactured using an aluminum alloy and used to maintain a supply side pressure and a delivery side pressure in a fluid supply line. The control valve includes a pneumatic actuator having a first pressure chamber and a second pressure chamber used to operate the process control valve, a delivery side sensor for determining a delivery side pressure, and a hardcoat anodized layer on aluminum alloy surfaces to create a barrier and reduce electrolysis and aluminum corrosion, The hardcoat anodized layer penetrates the aluminum alloy surfaces. Preferably, the hardcoat anodized layer has a thickness in the range of 0.0007 inch to 0.0012 inch, Most preferably, the hardcoat anodized layer has a thickness of about 0.001 inch. The hardcoat anodized layer penetrates the aluminum alloy surfaces to a depth in the range of 0.0007 inch to 0.0012 inch, most preferably to a depth of 0.001 inch.

An anti-ice system includes a duct that extends from a hot air bleed source to an anti-ice manifold and a direct-acting valve coupled to the duct. The duct may be configured to route hot air from the hot air bleed source to the anti-ice manifold at a regulated pressure and the direct-acting valve may include an inlet portion, a reference chamber, a force-type torque motor, an outlet portion, and a modulating sleeve. The inlet portion may be configured to be in hot air receiving communication with hot air from the hot air bleed source, the reference chamber may be configured to be in hot air receiving communication with the inlet portion, the force-type torque motor may be configured to control a reference pressure of hot air in the reference chamber, and the outlet portion may be configured in hot air receiving communication with the inlet portion via the modulating sleeve.

A flow arrangement for a control valve can include a plurality of flow-control components that are movable relative to each other and that define at least part of a flow path from a pressure source to a dome of a pressure relief valve. The flow-control components can be movable relative to each other in response to system pressure to selectively increase or decrease the flow capacity of the flow path. In some cases, flow capacity can be increased or decreased during initial loading of the dome, at low pressures, or at higher pressures.

A flow arrangement for a pressure relief valve assembly can include a bypass flow path extending from a pressure source to a dome of a relief valve. The bypass flow path can include a valve that is configured to open and close the bypass flow path based on pressure at the pressure source or the dome, or a pressure difference between the pressure source and the dome.

A device is provided for controlling the flow of a fluid through a conduit from an upstream side to a downstream side of the device. The device includes a valve aperture, a cylindrical mounting member on the downstream side of the valve aperture, a valve member on the outside of the cylindrical mounting member that moves reciprocally to open and close the valve aperture, a control volume defined between the cylindrical mounting member and the valve member, an arrangement for introducing a control pressure into the control volume, and a seal between the outer surface of the cylindrical mounting member and the inner surface of the valve member that substantially seals the control volume. The valve member is acted on by the pressure of the upstream side (P.sub.1) and the control pressure (P.sub.4) so as to be moved by the difference between these pressures.

A pneumatically controlled assembly, system, method and device for the regulation of pressure of a gas as it flows in a pressurized line and including at least one loading valve which is set to respond to variations in pressure in conjunction with a pneumatically actuated process control valve so as to effectively regulate and maintain pressure of the gas in the pressurized line.