How do Pneumatic actuators Valves Work|Pneumatic Actuators Valves Types

this video shows How do Pneumatic actuators Valves Work and different actuators types such as diaphragm actuator - piston actuator -vane actuator .

also explain what the difference between single&double acting actuators, Pneumatically controlled valves are those that actuate when air pressure is applied or removed.

You will learn how the valve works, its main components and the different types of valve actuator.

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control valves work in basically the same way as manually operated valves control valves can be either linear that
is the stem moves the valve disk up and down as in globe valves or they can be rotary which means that they are positioned by rotation

butterfly valves which open or close with a 90 degree
turn are examples of rotary control valves this is a globe type
control valve it has the same basic parts as a manually operated valve including a valve body a disk a seat a bonnet a stem
and a packing assembly control valves.

also have parts that may not be on manually operated valves for example control valves like this one generally include guides that align the valve stem and disc with the valve seat these guides help ensure precise control when the valve is opened and closed the upper stem guide on this valve is housed above the packing inside this part of the packing assembly this is the lower guide which is held in place by this part of the valve called a cage part of this cage along with other valve parts have been cut away to better show the valves construction.

the cage is a hollow cylinder containing openings when the valve disc is moved away from the seat fluid flows up through the seat through the cage openings and out of the valve .

one of the most common types of pneumatic actuators is the diaphragm actuator in a diaphragm actuator air pressure acts on a flexible diaphragm to position a valve a single acting diaphragm actuator is called single acting because air pressure acts on only .

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