A manually actuated valve assembly includes a valve body defining a flow passage, a valve member assembled with the valve body, an actuator housing assembled with the valve body, an actuator stem having an upper stem portion coupled with a lower stem portion by a coupling, a rotatable actuator drive member coupled to said upper stem portion, and a biasing spring disposed in the actuator housing. The actuator drive member is rotatable between a first stop position corresponding to a fully open valve position, and a second stop position corresponding to a fully closed valve position. The coupling between the upper stem portion and the lower stem portion is configured to provide an over-travel condition between the actuator drive member and said actuator stem configured to provide a closed valve condition at a predetermined rotational position of the actuator drive member that is offset from the second stop position.

The present invention provides an adjustment arrangement (10), comprising a rotating input element (26) at which a first torque from a motor arrangement (18, 22) can be inputted into the adjustment arrangement, a rotating output element (16) at which a second torque can be outputted by the adjustment arrangement, and a transmission portion for converting the first torque into the second torque, the transmission portion comprising a transmission means (32) having a first threaded portion (30) and a second threaded portion (34), the first threaded portion converting a rotation of the input element (26) into an axial movement of the transmission means, and the second threaded portion converting an axial movement of the transmission means into a rotation of the output element (16).

A valve operator assembly is provided for a valve and includes a housing, an input member rotatably mounted with respect to the housing, and a transmission mechanism having a rotating screw provided with an outer thread and a translating nut surrounding and coaxial with the screw, the nut being provided with an inner thread, the transmission mechanism being adapted to convert rotation of the screw into axial translation of the nut. The input member is mounted on the rotating screw. The assembly further includes an outer translating sleeve radially disposed between the housing and the translating nut and adapted to be connected to the valve translating member of the valve. The outer translating sleeve is provided with an inner thread and is connected to the translating nut so as to slide relative to the housing when the rotating screw rotates.

An arrangement for controlling and measuring flow. The arrangement includes a fluid control barrier and a flow-measuring apparatus upstream of the fluid control barrier. The fluid control barrier includes a pair of plates for opening and closing a pipe, and the plates are movable towards a center line of the pipe to open the pipe and produce a symmetrical flow profile for the flow-measuring apparatus.

The invention provides a cable drive device (10) including a linear drive member (12), and a cable drum (14) attached to a support bracket (30, 32) adapted to be affixed to a surface. The cable drum (14) has an axle (26) supported by the support bracket (30, 32) to allow rotation of the cable drum (14). The cable drum (14) has a cable (42) affixed at either end of said linear drive member (12) and tautly wrapped around the cable drum (14). The cable drum (14) is located between the ends of the linear drive member (12) to, in use, allow the linear drive member (12) to be guided through the bracket (30, 32) to move the linear drive member (12) longitudinally when the axle (26) is rotated.

A pinch valve having a valve housing, wherein the valve housing has a valve inlet and a valve outlet and a sleeve arranged between the valve inlet and the valve outlet, wherein the sleeve is connected to the valve inlet and the valve outlet and forms a valve channel, which valve channel can be flowed through in a conveyed direction by a conveyed medium, wherein the pinch valve further has a pinch bar, which moves back and forth in a closing direction between an open position and a closed position, wherein the pinch bar is in contact with the sleeve at least in the closed position, such that the pinch bar exerts a closing force on the sleeve in the closing direction, such that a channel cross-section of the valve channel perpendicular to the conveyed direction between the valve inlet and the valve outlet can be reduced and/or closed, wherein the sleeve has at least two material layers between which a first textile fabric, preferably a mesh, is arranged.

A valve operator assembly is provided for a valve and includes a housing, an input member rotatably mounted with respect to the housing, and a transmission mechanism having a rotating screw provided with an outer thread and a translating nut surrounding and coaxial with the screw, the nut being provided with an inner thread, the transmission mechanism being adapted to convert rotation of the screw into axial translation of the nut. The input member is mounted on the rotating screw. The assembly further includes an outer translating sleeve radially disposed between the housing and the translating nut and adapted to be connected to the valve translating member of the valve. The outer translating sleeve is provided with an inner thread and is connected to the translating nut so as to slide relative to the housing when the rotating screw rotates.

The present invention provides a valve with different threads for preventing rotation of and locking a bonnet with the valve.

Exemplary embodiments are directed to a needle valve that generally includes a valve seat, a first stem in threaded engagement with a first stem thread, and a second stem in threaded engagement with a second stem thread. Rotation of the first stem advances the first stem and the second stem towards the valve seat by a distance that is equal to a combined thread pitch of the first stem thread and the second stem thread. Engagement of the first and second stems during rotation of the first stem defines a dual thread actuation mechanism.