Abstract: A relief valve configured to allow content held within a vessel to be release under pressure is disclosed. The relief valve is configured to expose a release outlet when pressure within the vessel exceeds a release pressure, and the relief valve is further configured to maintain exposure of the release outlet after pressure within the vessel falls below the release pressure.

Abstract: A dual fluid heat exchange system is presented that provides a stable output temperature for a heated fluid while minimizing the output temperature of a cooled fluid. The heated and cooled fluids are brought into thermal contact with each other within a tank. The output temperature of the warmed fluid is maintained at a stable temperature by a re-circulation loop that connects directly to the mid portion of the tank such that the re-circulated fluid flow primarily warms only a re-circulation section of the tank. The other, lower flow rate, section of the tank may be positioned so that it has a cooler temperature and thus serves to increase the efficiency of the heat exchange by extracting extra heat energy out of the cooled fluid before it leaves the tank. Alternatively, the low flow rate section of the tank may be warmer than the re-circulated section, and thus allow the re-circulated section to be cooler than the output temperature of the warmed fluid.

Abstract: Certain aspects direct to systems and methods for preventing water pipe freeze. A water supply system includes a water pipe and an Internet of Things (IoT) tap device switchable between an open state and a closed state. An IoT temperature sensor is disposed on the water pipe to detect an environmental temperature of the water pipe and generate a corresponding temperature signal. The IoT tap device is communicatively connected to the at least one IoT temperature sensor. In operation, the IoT tap device requests and receives the temperature signal from the temperature sensor, and determines the environmental temperature based on the temperature signal. When the environmental temperature is at or below a threshold temperature, such as a freezing point of water, the IoT tap device controls its tap to switch to the open state such that water flows or drips out from the tap.

Abstract: The invention relates to a water inlet arrangement for the use in fish tanks in aquaculture, including a pipe to feed water into the tank, the pipe having a plurality of openings and, for a better adjustment of the flow, a surrounding second element having a plurality of openings and/or a fixed or adjustable shield are provided.

Abstract: A valve element for a hydraulic control device, in particular valve sleeve (1) or valve housing for a control valve on internal combustion engines or transmissions of motor vehicles, wherein the valve element has a displaceable control piston (2) which is subjected to load on one side by a spring (3) which is supported on a spring support (4) which is fixed to the valve element. The spring support (4) has at least one opening (7) which is connected to a pressure medium line, and the pressure medium line is in the form of a pressure medium inlet line. An axial filter (8) is arranged at the opening (7) of the spring support (4) and/or the opening (7) of the spring support (4) is provided with a check valve (9).

Abstract: A vacuum breaker valve is provided, including: a barrel member, a biasing assembly, a water stop gasket and a plate. The biasing assembly is abutted within the barrel member. The water stop gasket is disposed in the barrel member and abuts against the biasing assembly. The water stop gasket has a water stop portion which is deformable to close at least one air passage of the barrel member. The plate is located between the inlet end and the water stop gasket, and its engaging flange structure is blockable, in a direction toward the inlet end, by a shoulder portion of the barrel member. The biasing assembly normally drives the water stop portion of the water stop gasket apart from the at least one air passage to keep the at least one air passage non-closed.

Abstract: Embodiments include a flow regulating device. The flow regulating device may include a check valve. The check valve can have a first flange, a second flange and a ball seated against a seat defined by the first flange. The check valve is in a closed position when the ball is seated against the first flange. One or more stoppers may be positioned at a distance from the first flange. A fluid may flow through a first orifice and a second orifice defined in the first and second flanges respectively, when the first check valve is in an open position. The fluid lifts the ball from the first orifice, and pushes the ball towards the second orifice. The stoppers abut the ball when the first check valve is in a fully open position.

Abstract: A vacuum breaker includes a safe valve body and an elastic gasket. The safe valve body has a receiving space which has a periphery provided with connecting holes. The elastic gasket has a size smaller than that of the receiving space, with clearances being defined between the elastic gasket and the receiving space. The elastic gasket has a center provided with a through hole and has an outer periphery provided with a sealing portion. Thus, the sealing portion contracts inward when water stops passing the safe valve body, so that ambient air flows into the receiving space to break a vacuum state in the safe valve body, such that a fluid contained in the safe valve body flows through the clearances between the elastic gasket and the safe valve body, and is drained outward from the connecting holes.

Abstract: An one way valve comprising: a conical shaped valve seat (1); and a membrane (2) having a hole (3) that is located around the conical valve seat (1), such that a surface (60) of the valve seat (1) seals onto an inner periphery (61) of the hole in the membrane (2), wherein, in use, the membrane (2) is deflected from the surface (60) of the valve seat (1) to provide a fluid path across the membrane (2) and allowing fluid to flow from one side of the membrane (2) to the other.

Abstract: A switching or proportional valve has a valve drive, a valve body actuated by the valve drive, and at least one valve seat that, together with the valve body, delimits a flow cross-section for a flow medium conducted through the valve, wherein the flow cross-section is variable depending on the position of the valve body relative to the valve seat. The valve drive may be a rotary drive having a rotatable actuator, the actuator being coupled to the valve body in such a manner that the position of the valve body relative to the valve seat changes depending on the rotary position of the actuator. An eccentric element is rotationally related with the actuator. A spring-actuated return device with a plunger pressed by a spring against the eccentric element acts to return the eccentric element and the actuator to a starting position.

Abstract: A switch device with multiple water outputs includes a switch valve, a rotary rod, an engagement ring, a first rotary plate and a second rotary plate. The rotary rod is mounted through an opening of the switch valve. The engagement ring has an inner toothed ring and an outer toothed ring formed on a bottom end of the rotary rod. The first rotary plate and the second rotary plate respectively engage the inner toothed ring and the outer toothed ring, and the both rotary plates have multiple holes. As water entering the holes with different number and deviation angle of the first and second rotary plate selectively communicate with each other, different water outputs can be provided.

Abstract: An electrical actuator (1) especially for operating a valve (2) has at least one electric motor (3), a drive shaft (4) driven by the electric motor (3) and a gear shaft (5) rotatable by the drive shaft (4), which gear shaft is connected to a valve member (6) in a motion-transferring manner. Between the drive shaft (4) and the gear shaft (5), a return stop device (7) especially acting both ways in rotational direction is formed. This return stop device (7) has a pot-shaped outer part (8) and a hub part (9) rotatably supported therein. The hub part (9) is connected to the gear shaft (5) in a torque-proof manner and within at least one free space (10) between the hub part (9) and the outer part (8) a wedging member is arranged. This is only movement into free rolling position by the drive shaft (4) under a rotation of the drive shaft (4).

Abstract: Disclosed is an inflation valve enabling a user to quickly inflate and deflate an inflatable object. The inflation valve can include an inflation chamber that is an adequate size to capture a breath of air blown by a user from a distance away from an outside opening of the inflation chamber. This allows surrounding air into the area of low pressure created by the moving air, thereby greatly increasing the amount of air entering the inflatable object. To prevent air from escaping the inflatable object, the inflation valve can include a non-invertible one-way valve and/or an invertible one-way valve. Each valve can prevent air from escaping the inflation chamber until adequate pressure is applied from the outside opening of the inflation chamber, for example, as a result of a user blowing air into the inflation chamber. The invertible one-way valve can be inverted to reverse the properties of the valve.

Abstract: We describe a method of layer-by-layer deposition of a plurality of layers of material onto the wall or walls of a channel of a microfluidic device, the method comprising: loading a tube with a series of segments of solution, a said segment of solution bearing a material to be deposited; coupling said tube to said microfluidic device; and injecting said segments of solution into said microfluidic device such that said segments of solution pass, in turn, through said channel depositing successive layers of material to perform said layer-by-layer deposition onto said wall or walls of said channel. Embodiments of the methods are particularly useful for automated surface modification of plastic, for example PDMS (Poly(dimethylsiloxane)), microchannels. We also describe methods and apparatus for forming double-emulsions.

Abstract: A directional poppet valve (10) has valve pistons (16-22) arranged in a valve housing (12) for controlling a plurality of fluid connections (A, B, P, T). The positions of each valve pistons (16-22) in the valve housing (12) can be changed by at least one actuating device. The fluid connections (A, B, P, T) are connected to one another or separated from one another alternately depending on the position of the valve pistons (16-22). The valve pistons (16-22) are arranged inline along at least one axis (R), consecutively and/or at least such as to partially interengage, in the valve housing (12).

Abstract: A metering and well selection valve group, comprising a rotary type metering distributor with multiple shells; after entering the shells, an elbow extends from one side of shells; the part of elbow positioned in the shells is provided with filtering holes. Filtered fluid outlets are provided on the shells. Multiple check and stop dual purpose angle valves are corresponding to the quantity of shells, each one has a valve with an inlet pipe, a valve stem, a valve base, a valve element is provided on the inside of valve base, a handwheel is mounted on the outer end of valve stem. A first spring is mounted between the spring stop and the valve element. The outlet pipe of filtered fluid is communicated with the outlet of filtered fluid on the case body on the rotary metering distributor. Through the first valve, the extended part of elbow is communicated with the blocking removal fluid outlet chamber on the case body on the rotary metering distributor.

Abstract: A valve plate (1) made of fiber-reinforced plastic for gas exchange valves for reciprocating piston compressors comprises at least two concentric sealing rings (3) which cooperate with corresponding sealing surfaces (4) at the valve seal (5) by way of profiled sealing surface (2) and that are connected by way of radial webs (6). In order to improve the flexibility of the valve plate (1) and the sealing behavior, the webs (6) are designed thinner along the entire radial extent thereof between the sealing rings (3) on both sides of the valve plate (1) compared to the adjacent thickness of the sealing rings (3).

Abstract: A fusible plug type pressure relief valve includes a housing, a valve element, a spring member, and a fusible piece. A valve passage is formed in the housing. A valve element is arranged at a closed position in the housing, the closed position being a position at which the valve element closes the valve passage. The valve element is movable to an open position at which the valve element opens the valve passage. The spring member presses the valve element in an open direction. The fusible piece supports the valve element against pressing force of the spring member. The fusible piece melts at not less than a predetermined melting temperature. An inner surface of a concave portion of the fusible piece contacts the valve element. The concave portion includes a tapered portion inclined relative to an axis line of the valve element.

Abstract: Embodiments of the present disclosure may include a partition for a fuel tank. The partition may include a sheet of material extending laterally within an interior mid-region of the fuel tank. The sheet may have a length and a width that are at least substantially equal to a length and a width of the mid-region of the fuel tank, and the sheet may be shaped to conform to an interior perimeter of the mid-region of the fuel tank. The partition may also be configured to substantially divide the fuel tank into an upper interior region located above the partition and a lower interior region located below the partition.

Abstract: A valve for metering fluid under pressure includes: a valve housing having an inlet opening and a metering opening for the fluid; an outward-opening valve needle pressure equalized via an elastic hollow body which is subject to the fluid pressure; and an electromagnet which lifts the valve needle up from the metering opening against the force of a valve closing spring. The valve housing is assembled from a valve tube and one valve body on the metering end and another on the inlet end, each being connected in a fluid-tight manner to the valve tube at the tube ends. The magnet pot including the enclosed solenoid coil is secured on the valve tube on the outside by the electromagnet, and the magnetic core is secured on the valve tube on the inside in such a way that it surrounds a needle section of the valve needle.