Pressure-reduction devices for fluid systems are disclosed. An example device includes a housing defining an axial fluid passageway between an inlet and an outlet. A first plate is fixed to the housing and positioned in the axial fluid passageway. A second plate is positioned adjacent the first plate in the axial fluid passageway. The second plate is moveable relative to the first plate between a first position to move the pressure-reducing device to a closed position to restrict or prevent fluid flow through the axial fluid passageway and a second position to move the pressure-reducing device to an open position to allow fluid flow through the axial fluid passageway.

An inerting fuel tank system comprising a closed tank and any number of flow impingement valves. The flow impingement valve allows uninhibited flow in one direction. In the reverse direction, the fluid flows back into the input flow stream thereby slowing / preventing the fluid flow outward. The flow impingement valve resists reverse flow of fluid out of a fuel tank vent due to sloshing or other flow dynamics.

A vacuum system non-return valve includes a baffle for extending across a flow path in the vacuum system and a valve member. The baffle has an aperture, a perimeter of the aperture has a valve seat. The valve member has a curved sealing surface configured to mate with the valve seat. The valve member and aperture are configured such that the valve member obscures the aperture and seals with the valve seat to impede a flow of fluid in a closed position and is displaceable in use to move away from the valve seat and allow a fluid flow in an open position; at least a portion of the surface of the baffle surrounding the aperture slopes towards the inlet end of the valve such that the aperture is smaller at the inlet end than it is at the outlet end.

A valve system includes a housing that houses a fluid path having an inlet side and an outlet side, and a fluid purge port disposed at and in fluid communication with the outlet side of the fluid path. The housing includes: an inlet valve disposed in fluid communication with the fluid path at the inlet side and in operable communication with an inlet gear; an outlet valve disposed in fluid communication with the fluid path at the outlet side and in operable communication with an outlet gear; and a control gear disposed in operable communication with both the inlet gear and the outlet gear.

Embodiments of the disclosure relate to a system designed to compensate for flow disturbances when changing a flow rate in the system. The system includes a flow source device having an inlet and an outlet. The inlet is configured to receive fluid at a first pressure, and the outlet is configured to output the fluid at a second pressure that is higher than the first pressure. The system also includes a fluid control device having an inlet port and a drain port. The inlet port of the fluid control device is configured to receive flow from the outlet of the flow source device. Further, the system includes a constant flow regulator configured to provide a leakage flow to a drain output. The constant flow regulator is configured to decrease the leakage flow in response to the drain port of the fluid control device.

The present invention is directed to a self-sealing breakaway valve having a poppet-style design. The breakaway valve may be made from two body portions coupled together by one or more frangible fasteners in order to form a flow path through the breakaway valve. Each body portion may include a valve mechanism responsive to separation of the two body portions from each other to cause closure of the flow path in the respective body portion. The valve mechanisms may be releasably coupled together by a coupling key configured to restrict movement of each valve mechanism, so that the flow path within the breakaway valve remains open. Upon separation of the two body portions from each other, the coupling key may be released from the valve mechanisms allowing for closure of the flow path by the valve mechanisms thereby preventing fluid leakage from the breakaway valve.

A backflow prevention system and apparatus is disclosed. The system includes a pipe designed to couple to a washer. The backflow prevention apparatus includes a housing and two one-way valves. The housing secured to the pipe. A first one-way valve is coupled to the housing, with the first one-way valve defining a first cross-slit. A second one-way valve is coupled to the housing and spaced from the first one-way valve, with the second one-way valve defining a second cross-slit. The first one-way valve and the second one-way valve are designed to allow fluid flow, through the housing, in a first direction and prevent flow of suds, foam, gas, or combinations thereof in a second direction opposite the first direction.

A slam-shut safety assembly configured to provide redundant safety shutoff in a gas distribution system. The slam-shut safety assembly includes a valve body, a first slam-shut safety device coupled to the valve body, and a second slam-shut safety device coupled to the valve body. The valve body has an inlet, an outlet, and defines a flow path extending between the inlet and the outlet. The first slam-shut safety device is configured to block the flow path at a first position responsive to an overpressure condition or an underpressure condition. The second slam-shut safety device is configured to block the flow path at a second position responsive to the overpressure condition or the underpressure condition.

A fluid regulator includes an actuator assembly disposed in a valve body. A sleeve includes a cylindrical wall, a first plate, and a second plate. Each of the first plate and the second plate is disposed in a cavity of the sleeve. A stem extends through the sleeve and is axially aligned with a longitudinal axis of the body, and includes a passage extending partially through the stem. The actuator assembly includes first and second pistons. First, second, third, and fourth chambers are separately disposed between the sleeve, the first or second plate, or the first or second piston. The first and third chambers are in fluid communication, and the second and fourth chambers are in fluid communication via the passage of the stem. The actuator assembly actuates a control element in response to a fluid pressure receivable in the first, second, third, and/or fourth chambers.

A slam-shut safety assembly configured to provide redundant safety shutoff in a gas distribution system. The slam-shut safety assembly includes a valve body, a first slam-shut safety device coupled to the valve body, and a second slam-shut safety device coupled to the valve body. The valve body has an inlet, an outlet, and defines a flow path extending between the inlet and the outlet. The first slam-shut safety device is configured to block the flow path at a first position responsive to an overpressure condition or an underpressure condition. The second slam-shut safety device is configured to block the flow path at a second position responsive to the overpressure condition or the underpressure condition.