The following disclosure relates to a valve assembly for allowing filling and draining of a container with a liquid, preferably for use in growing plants, the valve comprising: a filling catchment containing at least one opening for receiving liquid and at least one drainage orifice, the filling catchment being located within the container; a draining outlet adapted to convey liquid out of the container; a plugging member configured to move between a first position where the plugging member allows liquid to flow into the draining outlet and a second position where the plugging member prevents liquid from flowing through the draining outlet; and a biasing member which acts to retain the plugging member in the first position unless a force is applied above a predetermined value. Also provided are systems including and methods of using said valve assembly.

A pressure actuated switching valve includes a first valve chamber including a first chamber portion. The first chamber portion has a first inner diameter, a second chamber portion having a second inner diameter that is greater than the first inner diameter, a third chamber portion having a third inner diameter that is greater than the first inner diameter, a fourth chamber portion having a fourth inner diameter that is greater than first inner diameter, and a valve member. The valve member includes a first section having a first outer diameter that is greater than the first inner diameter. A second section of the valve member has a second outer diameter that is closely matched to the third inner diameter. A third section of the valve member is arranged has a third outer diameter that is greater than the first outer diameter.

A pressure regulator including a closure resisting mechanism that increases the total closure resisting force of a closure element to prevent the closure element from moving into a closed position until a predetermined pressure set point is reached. The closure resisting mechanism operates automatically and is spring actuated in response to pressure within a fluid pathway of the regulator. The closure resisting mechanism is disposed external to the fluid pathway so as not to impede fluid flow.

A sleeve valve includes an inlet port and an outlet port. A sleeve is movable to close flow from the inlet port to the outlet port. The sleeve valve has a sleeve biased to an open position at which it allows flow from the inlet port to the outlet port by a spring. Pressure in a pressure chamber urges the sleeve to a closed position at which it blocks flow from the inlet port to the outlet port. A line pressure conduit communicates the fluid chamber into the pressure chamber. Pressurized air is supplied to the pressure chamber through a selectively closed valve. The selectively closed valve is opened to allow the flow of high pressure air from a pressure source into the pressure chamber to move the sleeve to a closed position. A bleed air system for a gas turbine engine is also disclosed.

The present invention is directed to a minimum pressure valve comprising a housing (13) with a valve inlet (11) and a valve outlet (12) which are connected by means of a chamber (16), said minimum pressure valve (10) further comprising a valve body (17) movable in said chamber (16) between a closed position in which said valve inlet (11) is closed off, and an open position in which said valve inlet (11) is open, whereby said minimum pressure valve (10) further comprises a regulation unit (18) for setting the value of the pressure at which the valve body (17) moves into an open position.

A coaxial liquid pressure regulator includes a housing having an inlet portion and an outlet portion, a substantially tubular valve member slidingly accommodated inside the housing and having a longitudinal axial passage and an upstream end with an inlet edge for the liquid, a valve body fixed inside the inlet portion and defining a seat that interacts with the inlet edge of the valve member and forms therewith a port having a variable width. The inlet portion includes an inlet fitting and a collection chamber directly downstream from the inlet fitting and the valve body includes a cantilever element transversely extending from the inner wall of the collection chamber. First and second deflection elements are arranged between the inlet fitting and the inlet edge, which facilitate flow conveyance toward the port and the longitudinal passage of the valve member.

A valve for a vacuum apparatus includes a first housing element and a second housing element wherein an outer chamber is defined by the first housing element and the second housing element. The first housing element has a first opening and the second housing element has a second opening in fluid communication with the first opening via the outer chamber. An inner chamber is defined by the first housing element and the second housing element wherein a membrane is disposed in the inner chamber. A sealing element is connected to the membrane and is moveable from a first position to a second position wherein in the first position the sealing element closes the first opening in a leak-tight manner and in the second position the sealing element opens the first opening to allow a gaseous medium to flow through the valve.

A fluidic valve may include an inlet, a control port, an additional control port, an outlet, a fluid channel configured to convey fluid from the inlet to the outlet, and a piston that includes (1) a restricting gate transmission element configured to block, when the piston is in a first position, the fluid channel and unblock, when the piston is in a second position, the fluid channel, (2) a controlling gate transmission element configured to interface with a control pressure from the control port that forces the piston towards the first position when applied to the controlling gate transmission element, and (3) an additional controlling gate transmission element configured to interface with an additional control pressure from the additional control port that forces the piston towards the second position when applied to the additional controlling gate transmission element. Various other related devices, systems, and methods are also disclosed.

An inline valve includes a sliding piston having a radially outer stop portion with a forward end. A radially inner sliding portion is connected to the radially outer stop portion by an arm. A housing includes an outer housing body surrounding the piston. The housing has a stop surface selectively in contact with the forward end of the radially outer stop portion of the piston to block flow for a housing inlet to a housing outlet. The radially inner sliding portion slides on a support tube. At least a portion of the radially inner sliding portion is formed of a first material having better wear resistance than a second material forming the outer stop portion of the piston. The second material has a greater resistance to high temperature and pressure than the first material. A vent valve for a compressor is also disclosed.

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.