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 pressure regulating shut-off valve (PRSOV) for an aircraft anti-ice system includes a valve body defining an inlet and an outlet and a fluid flow path between the inlet and the outlet. The valve includes a first piston is operable as a shut-off piston, a second piston is operable as a shut-off piston and as a regulating piston and a third piston is operable as a regulating piston, the third piston being actuable to regulate flow between the inlet and the outlet.

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 pressure regulator has a pressure chamber connected to an inlet flow area which receives liquid flow. As liquid flows into a forward chamber of the pressure chamber, pressure is exerted on the forward face of the piston, which in turn causes the piston to slide longitudinally through the pressure chamber. A bypass fluidically connects the forward pressure chamber and rear pressure chamber such that as the piston slides into the rear pressure chamber pressure increases at the rear pressure chamber, which in turn forces the piston to move forwardly, thus regulating flow out of the pressure chamber. A hand wheel is configured to turn a movable plate located inside the pressure chamber, with the movable plate configured to impede the piston from moving rearwardly. Pressure sensors and vents with a pressurized air source may be used to keep the pressure within a desired range.

A valve subassembly includes a main spool having a continuously adjustable main orifice and a control spool having adjustable first and second orifices. The control spool has first and second end positions and is acted upon by a first spring toward the first end position. A fluid flow path starts from a pump and runs to an actuator via the first orifice, first control point, second orifice, second control point, main orifice, and third control point. Pressure at the first control point acts on the control spool toward the second end position and pressure at the third control point acts toward the first end position. The second orifice is closed between the first end position and an intermediate position, and opens from the intermediate position to the second end position. The second orifice opening decreases from the intermediate position to the second end position from a nonzero value to zero.

An inlet pressure valve regulation system to provide a regulated fluid flow includes a housing, first piston assembly, regulating valve, and inlet pressure conduit. The housing has an inlet at an inlet end which receives a pressurized fluid and an outlet at an outlet end which provides the regulated fluid flow. The piston assembly is arranged in the housing and has a first cavity and a control orifice to fluidly connect the inlet to the first cavity. The first piston assembly is configured to regulate the fluid flow. The regulating valve has a first valve chamber, a second valve chamber fluidly connected to a vent, a floating valve seat disposed between the first valve chamber and the second valve chamber, and a valve component. The floating valve seat includes a diaphragm and a seat having a passageway to fluidly connect the first valve chamber and the second valve chamber.

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.

A regulator controls a pressure of fluid. The regulator includes a body having a cavity formed therein, an inlet through which the fluid flows, an outlet through the fluid discharged, and a pilot fluid inlet; a first diaphragm located in the cavity and partitioning the cavity into a first chamber and a second chamber, the first chamber being in fluid communication with the inlet and the outlet, the second chamber being in fluid communication with the pilot fluid inlet; a first biasing mean located in the first chamber and configured to bias the first diaphragm; and a second biasing mean located in the second chamber and configured to bias the first diaphragm by being displaced based on pilot fluid pressure of the pilot fluid.

An inlet pressure valve regulation system to provide a regulated fluid flow includes a housing, first piston assembly, regulating valve, and inlet pressure conduit. The housing has an inlet at an inlet end which receives a pressurized fluid and an outlet at an outlet end which provides the regulated fluid flow. The piston assembly is arranged in the housing and has a first cavity and a control orifice to fluidly connect the inlet to the first cavity. The first piston assembly is configured to regulate the fluid flow. The regulating valve has a first valve chamber, a second valve chamber fluidly connected to a vent, a floating valve seat disposed between the first valve chamber and the second valve chamber, and a valve component. The floating valve seat includes a diaphragm and a seat having a passageway to fluidly connect the first valve chamber and the second valve chamber.

A pressurized-fluid controlled pressure regulator includes a piston configured to slide within the pressure regulator, a plate of the piston positioned in and separating a pressure chamber into two sections and a shaft of the piston extending from the plate out of the pressure chamber and into a liquid flow chamber, wherein the introduction of liquid into the liquid flow chamber exerts a force on the piston shaft, moving the piston to an open position, and wherein the introduction of various amounts of pressurized fluid into the different sections of the pressure chamber allows for selective movement of the piston between a closed position and open position.