An actuating mechanism includes an actuating shaft, an actuated member, and an engaging and disengaging structure. The actuating shaft is configured to be rotatable. The actuated member can be actuated by the actuating shaft to rotate. The engaging and disengaging structure includes an actuating structure provided on the actuating shaft and an actuated structure provided on the actuated member. When the actuating structure engages with the actuated structure, the actuating structure can drive the actuated structure to rotate, such that the actuating shaft can drive the actuated member to rotate. Further, a set of actuating and actuated structures of the actuating mechanism can rotate and stop according to set angle requirements, such that a valve body can be actuated to connect and disconnect different fluid passages as required.

A bypass system for a water heat exchanger is disclosed. The water heat exchanger has a water heat exchanger inlet attached to a feed valve and a water heat exchanger outlet attached to an exit valve. The feed valve and the exit valve are three-way bypass valves attached to a bypass line. When the feed valve and the exit valve are in the flow through position, fluid will flow into and out of the water heat exchanger. When the feed valve and the exit valve are in the bypass position, fluid will not enter nor exit the water heat exchanger, but fluid will flow through the bypass line.

A control mechanism locks open a spring-loaded valve and automatically releases the spring-loaded valve to close upon a predetermined lesser weight load being applied. The spring-loaded valve includes a flow valve, a valve lever that pivots between open and closed positions, and a valve spring that biases the valve lever to the closed position. The control mechanism includes a pivotal release lever having an engagement arm and an opposite load arm, and a release spring that biases the release lever from a blocking position with the engagement arm retaining the valve lever in its open position to a release position with the valve lever free to pivot past the engagement arm and to the closed position under the valve spring force. The load arm includes an additive-container support for a load of an additive fluid to be mixed with a carrier fluid whose flow is controlled by the valve.

A fluidic valve unit having a plurality of rotary slide valves arranged in series and a servo motor for setting the rotary slide valves, wherein each of the rotary slide valves comprises a rotary slide arranged in a rotary slide housing and drivable via a driveshaft by means of the servo motor. It is provided in this case that each two successive ones of the rotary slide valves are mechanically connected to one another via a driver device for the setting by means of the servo motor, wherein the driver device comprises a driver projection arranged on a first of the two rotary slide valves.

An example control valve is disclosed herein and includes a valve body having a substantially axial fluid flow path extending from an upstream face surface to a downstream face surface of the valve body. A crank is disposed within the valve body, and a reciprocating valve trim, external to the valve body, is coupled to the crank and abuts the downstream face surface of the valve body.

A flow regulating switch valve includes a valve core that includes a switch assembly configured to drive a diaphragm assembly to open or close a water outlet, and also includes a flow regulating assembly that comprises a rotating ring, a sliding block, and a magnet. A control key is configured to control the switch assembly. The rotating ring is connected to the control key and includes an inclined plane that transitions from high to low and is configured to drive the sliding block to slide up and down such that the sliding block drives the magnet to move up and down. The magnet is configured to control the diaphragm assembly to regulate a size of the water outlet.

A stopcock manifold system includes: a manifold provided with one or several stopcocks, each having a rotary opening/closing control apparatus with at least one finger or crank pin; a rotary mechanized actuator coupling part for each manifold, a rotary axis of the coupling part corresponding in use to a rotation axis of the control apparatus, the coupling part coupling with the stopcock by insertion of each crank pin into a closed notch in the coupling part, the closed notch of each coupling part receiving one of the crank pins of the corresponding stopcock, such that the crank pin is insertable into the corresponding coupling part by tilting the manifold and then straightening it, until it abuts on a first bearing point comprised of an edge of the closed notch; and a maintaining system that enables each coupling part to individually maintain the corresponding stopcock in place.

A valve control device for controlling the opening and closing of a valve, including a first control arm and a second control arm, wherein the first control arm is arranged to rotate around a first axis at a first end, wherein the second control arm is arranged to rotate around a second axis at a first end, wherein the first axis is perpendicular to the second axis, and wherein the interface between the first control arm and the second control arm includes a fork and a rotatable member, and wherein the centre axis of the rotatable member is parallel to the upper bearing surface and the lower bearing surface of the fork. The advantage is that the wear of the rotatable member is reduced.

According to particular embodiments, a valve operating assembly, such as for a tank car bottom outlet valve, comprises a slide rotationally coupled to and transversely slidable relative to a valve stem. The slide comprises a shape that facilitates rotational coupling with a handle and the slide further comprises a connector for engaging a protective plate to limit rotation of the slide about a valve rotational axis when in a first position and free to rotate about the valve rotational axis when in a second position.

A power-assisted track stop valve comprises a lower valve body, an upper valve body is detachably fixed on the top of the lower valve body, a lead screw is arranged inside the upper valve body; positioning pins are arranged on the inner side of the upper part of the upper valve body, guiding slots are arranged on the upper part of the outside of the lead screw at positions corresponding to the positioning pins, the positioning pins on the same side extend to the inside of the guiding slots on the same side; a valve core, which is arranged inside the lower valve body, the valve core is movably connected to the lower valve body, the lower end of the lead screw extends to the inside of the lower valve body and is connected to the valve core; the valve core comprises an outer core and an inner core.