A valve actuating device (20) for opening and closing a valve (22) is disclosed.

A first actuator (12) is adapted to open and close a valve (13a) in the first conduit (14), and a valve (13b) in the second conduit (16).

The present invention relates to a socket (10, 40, 50) suitable for turning a hand wheel to close or open a valve.

The pressure difference will be capable of activating a piston stroke which is used to perform a task, such as opening or closing a valve (3).

A device for turning off a valve for a utility such as gas or water includes a spring loaded valve assembly (131) and a valve stem (137) held away from a valve seat (140) by a latch (133).

In other words, it will require a group effort to fully close a valve.

With gas, by simplifying, it is enough to open or close a valve.

Wireless signals can be used to open or close a valve or to reset a "tripped" indicator.

An acoustic flow meter in the form of a valve key has an acoustic sensor for measuring the peak sound level which occurs when the key is used to close a valve in a fluid pipeline.

This can be programmed to open or close a diverter flow valve.

A wellhead assembly (10) for an injection tubing string is provided which allows a master valve to be closed without damaging the injection tubing siring while still allowing for the use of a back pressure valve to isolate the tree.

An inflation adaptor may be used to open and close a catheter valve at the proximal end of the hollow catheter.

A DC motor is used to open and close the valve of an EGR valve device.

For example, to open and close a ball valve, the pneumatic actuator mechanically generates a rotary motion.

Device used for opening, controling and closing a valve, which is used in general when a valve is positioned remotely, when it's located in hazardous areas or when the manual operation of the valve would take too much time.