A flow passage switching valve includes a U-turn valve member that has a first valve component and a second valve component in a quadrangular cylindrical shape. The first valve component includes a first U-turn passage formed in an end surface facing a first valve seat and an annular wall portion which is formed in an end surface near a second valve seat and in which an end portion of the second valve component near the first valve seat is fitted. The end surface of the first valve component and an inner circumferential surface of the second valve component form a second U-turn passage.

A multi-valve for distributing at least one fluid, includes a plurality of input channels for supplying a respective fluid, a plurality of output channels for discharging the fluid, wherein a respective input channel can be connected via a plurality of input branches to a respective, substantially coaxially arranged output branch of the respective different output channels, and a switch plate which is arranged in a gap between the input branches and output branches and can be translationally moved transversely to the input branches and output branches in order to open and/or close a connection of the respective input branch to the respectively assigned output branch, wherein the switch plate is connected to an endless belt. (FIG. 2)

A transportable valve rack for securing a plurality of pressure safety or pressure relief valves in an upright position. The valves of the type having a bolted flange-type connection and the rack comprises a base assembly and a top plate mounted on the base assembly. The top plate includes a plurality of areas, with each area comprising a plurality of holes arranged on a circumference of two or more concentric circles. The plurality of holes extends through the top plate and at least four holes are on the circumference of each concentric circle. The holes are sized and arranged to align with bolt holes of pre-selected flanges of particular size and pressure rating. Nuts and bolts extended through aligned holes secure the valve to the valve rack.

A transportable valve rack for securing a plurality of pressure safety or pressure relief valves in an upright position. The valves of the type having a bolted flange-type connection and the rack comprises a base assembly and a top plate mounted on the base assembly. The top plate includes a plurality of areas, with each area comprising a plurality of holes arranged on a circumference of two or more concentric circles. The plurality of holes extends through the top plate and at least four holes are on the circumference of each concentric circle. The holes are sized and arranged to align with bolt holes of pre-selected flanges of particular size and pressure rating. Nuts and bolts extended through aligned holes secure the valve to the valve rack.

Servo-valve that controls fluid discharged from a nozzle discharge port by displacing the nozzle, and that drives an actuator. The servo-valve includes a receiver provided with a first inflow port into which the fluid discharged from the discharge port flows. At least either the discharge port or the inflow port is a non-circular opening formed such that the amount of change in the area of overlap of the discharge and inflow ports occurring when the nozzle is displaced from the initial position is larger than in cases where the discharge port and the inflow port are of circular form of the same area. The increased amount whereby the area of overlap between the discharge and inflow ports changes when the nozzle is displaced from the initial position lets the fluid flow into the inflow port more quickly, improving the response speed of the actuator.

Servo-valve that drives an actuator by using a fluid. The servo-valve includes a nozzle having a discharge edge forming an outline of a discharge port from which the fluid is discharged and a tapered inner wall growing narrower toward the discharge edge, and a receiver that is provided with a flow path into which the fluid discharged from the discharge port flows. The nozzle is displaced in a direction different from the fluid discharge direction. The flow path extension direction is inclined with respect to a direction orthogonal to an inflow surface facing the nozzle by an angle α. A taper angle determined by the tapered inner wall is larger than twice the angle α. With such a configuration, the component of flow force exerted from the fluid on the tapered inner wall decreases. Since the nozzle can be quickly displaced, response speed of the actuator is improved.

Servo-valve that drives an actuator by using a fluid. The servo-valve includes a nozzle having a discharge edge forming an outline of a discharge port from which the fluid is discharged and a tapered inner wall growing narrower toward the discharge edge, and a receiver that is provided with a flow path into which the fluid discharged from the discharge port flows. The nozzle is displaced in a direction different from the fluid discharge direction. The flow path extension direction is inclined with respect to a direction orthogonal to an inflow surface facing the nozzle by an angle α. A taper angle determined by the tapered inner wall is larger than twice the angle α. With such a configuration, the component of flow force exerted from the fluid on the tapered inner wall decreases. Since the nozzle can be quickly displaced, response speed of the actuator is improved.

The valve for the minimum waste concrete pump, object of the present invention, comprises a valve for the minimum waste concrete pump that comprises a double-piston alternative-type pump valve provided with an inlet conduit (20) and a discharge conduit (30) installed inside the valve container (10) and arranged next to a concrete reception hopper located above the container, allowing to pump concrete and other pasty substances, such as: sludge, mining residues, grout, mortar, dirty water, and similar. The embodiment of the valve generates the minimum of waste retained after the equipment operation, improving the durability and efficiency of use of the pumps, besides reducing the cleaning time, resulting in a great reduction of operational costs, avoiding the unnecessary displacement of the pump equipment to the central. In addition, this new embodiment results in a valve performing a linear translation movement that reduces component wear and minimizes the need for maintenance on the equipment, as its embodiment does not require constant lubrication.

The valve for the minimum waste concrete pump, object of the present invention, comprises a valve for the minimum waste concrete pump that comprises a double-piston alternative-type pump valve provided with an inlet conduit (20) and a discharge conduit (30) installed inside the valve container (10) and arranged next to a concrete reception hopper located above the container, allowing to pump concrete and other pasty substances, such as: sludge, mining residues, grout, mortar, dirty water, and similar. The embodiment of the valve generates the minimum of waste retained after the equipment operation, improving the durability and efficiency of use of the pumps, besides reducing the cleaning time, resulting in a great reduction of operational costs, avoiding the unnecessary displacement of the pump equipment to the central. In addition, this new embodiment results in a valve performing a linear translation movement that reduces component wear and minimizes the need for maintenance on the equipment, as its embodiment does not require constant lubrication.

A gas grill is disclosed having a gas control valve with a push to sear feature. The gas control valve has a housing with a valve core rotatably disposed within the housing. A sear valve is disposed within the valve core. A user rotates the valve core within the housing to selectively align a gas inlet port with an inlet passage and to align a sear gas port and a sear gas flow passage. The sear valve has a sear valve element which is selectively movable relative to the valve core to selectively pass a sear gas through a sear gas port and a sear flow passage to the forward end of the valve housing, and then to the grill. A bias member, preferably a coil spring, is mounted between the sear valve element and the valve core for urging the sear valve element to a closed position.