A membrane valve for controlling flow and pressure relief, has a format following the anatomy and the action mechanism of a sphincter, in order not to have restriction points to the fluid flow. The valve includes a body provided with terminal sections provided with ends and, internally, a folded membrane which opens and closes according to the flow and/or pressure exerted therein, directly or indirectly, locally or remotely.

A servo valve comprising: a fluid transfer valve assembly includes a valve body having a supply port and a control port (C). The valve body cincludes first and second nozzles and a drive member therebetween, arranged to regulate flow of fluid from the supply port to the control port in response to a control signal. The drive member comprises an elongate member arranged to rotate in response to the control signal, and a cylindrical disk mounted on, and arranged to rotate with, the elongate member, between the first and second nozzles, the cylindrical disk having a cam profile such as to vary the spacing (A, B) between the disk and at least one of the nozzles as the cylindrical disk rotates relative to the first and second nozzles.

A servo valve comprising: a fluid transfer valve assembly includes a valve body having a supply port and a control port (C). The valve body cincludes first and second nozzles and a drive member therebetween, arranged to regulate flow of fluid from the supply port to the control port in response to a control signal. The drive member comprises an elongate member arranged to rotate in response to the control signal, and a cylindrical disk mounted on, and arranged to rotate with, the elongate member, between the first and second nozzles, the cylindrical disk having a cam profile such as to vary the spacing (A, B) between the disk and at least one of the nozzles as the cylindrical disk rotates relative to the first and second nozzles.

A pressure relief valve (10) is provided for controlling fluid flow between a first fluid path (12a) and a second fluid path (12b). The pressure relief valve includes a housing (14), a diaphragm member (24) movably affixed within the housing and having a fluid port (18), a first biasing member (20) for urging the diaphragm member in a first direction, and a sealing member (26) movably mounted in the housing and configured for reversibly sealing the fluid port (18). When a pressure at the second fluid path (12b) exceeds a first predetermined threshold the diaphragm member (24) is pushed against the first biasing member (20), and the sealing member (26) is initially urged towards the fluid port (18) and subsequently becomes disengaged with the fluid port, allowing fluid communication between the second fluid path (12b) and the first fluid path (12a) via the fluid port. When the pressure at the second fluid path (12b) decreases below a second predetermined threshold, the sealing member (26) becomes disengaged from the diaphragm member (24), allowing fluid communication between the first fluid path and the second fluid path via the fluid port. A valve assembly including the pressure release valve (10) and an externally actuated valve (60) is also provided.

A pressure relief valve (10) is provided for controlling fluid flow between a first fluid path (12a) and a second fluid path (12b). The pressure relief valve includes a housing (14), a diaphragm member (24) movably affixed within the housing and having a fluid port (18), a first biasing member (20) for urging the diaphragm member in a first direction, and a sealing member (26) movably mounted in the housing and configured for reversibly sealing the fluid port (18). When a pressure at the second fluid path (12b) exceeds a first predetermined threshold the diaphragm member (24) is pushed against the first biasing member (20), and the sealing member (26) is initially urged towards the fluid port (18) and subsequently becomes disengaged with the fluid port, allowing fluid communication between the second fluid path (12b) and the first fluid path (12a) via the fluid port. When the pressure at the second fluid path (12b) decreases below a second predetermined threshold, the sealing member (26) becomes disengaged from the diaphragm member (24), allowing fluid communication between the first fluid path and the second fluid path via the fluid port. A valve assembly including the pressure release valve (10) and an externally actuated valve (60) is also provided.

A stepper motor proportionally controlled bellows valve system comprising: a valve manifold; one or more stepper motors; and one or more bellows valves. The one or more bellows valves may comprise a bellows, a sealing washer, and a profile washer. The sealing washer is configured to removeably engage with a vacuum orifice rim. The profile washers are configured to stick into the valve orifice, such that the profile washer defines a flow through the valve.

A stepper motor proportionally controlled bellows valve system comprising: a valve manifold; one or more stepper motors; and one or more bellows valves. The one or more bellows valves may comprise a bellows, a sealing washer, and a profile washer. The sealing washer is configured to removeably engage with a vacuum orifice rim. The profile washers are configured to stick into the valve orifice, such that the profile washer defines a flow through the valve.

A stepper motor proportionally controlled bellows valve system comprising: a valve manifold; one or more stepper motors; and one or more bellows valves. The one or more bellows valves may comprise a bellows, a sealing washer, and a profile washer. The sealing washer is configured to removeably engage with a vacuum orifice rim. The profile washers are configured to stick into the valve orifice, such that the profile washer defines a flow through the valve.

A stepper motor proportionally controlled bellows valve system comprising: a valve manifold; one or more stepper motors; and one or more bellows valves. The one or more bellows valves may comprise a bellows, a sealing washer, and a profile washer. The sealing washer is configured to removeably engage with a vacuum orifice rim. The profile washers are configured to stick into the valve orifice, such that the profile washer defines a flow through the valve.

A method for monitoring a system with mechanically movable parts, preferably a valve system, wherein the system is preferably part of a technical plant, in particular a production plant, and wherein the system has at least one mechanically movable part, in particular a valve, where the method comprises a) acquiring indicators, which can be used for a technical characterization of a movement procedure of the mechanically movable part, via technical devices configured for the acquisition of the indicators and b) transferring the acquired indicators to an evaluation unit arranged outside the system to determine a technical status of the system.