Regarding the internal structure of the valve
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If it’s the valve shown, what is its internal structure like? Are there any internal photos or animations available? Please help*.
Based on visual inspection of the actuator, it should be a angular stroke actuator; the valve body should be a butterfly valve or a ball valve, and judging from the length of the valve body, it is likely to be a butterfly valve. Just personal opinion
Single-acting pneumatic actuator. The element on the left is a spring, the one on the right is a piston; a fork in between converts linear motion into rotational motion.
It’s just a fork-type pneumatic actuator; no valves can be seen. Here’s a structure diagram for you
The red-painted part above is a fork-type pneumatic actuator; there are many images available on Baidu showing its working principle and internal structure. The valve connected below is out of sight, so it’s not known what kind of valve it is. However, this pneumatic actuator has an angular stroke, so it is more likely to be a ball valve or a butterfly valve.
Actuator, with a cylinder on one end and a return spring on the other end
To operate the butterfly valve, its structure is very simple – just like that of a regular butterfly valve. The diagram on the drive mechanism makes things clear!
It’s similar to the action of rubbing a bamboo dragonfly with two hands
Cylinder actuator: one type is the fork-type, and the other is the gear-rack type. The diagram above should represent the fork-type design, which is generally used in applications that require high torque.
It looks like a quick-cut valve, that is, a pneumatic gate valve