What kind of valve is this?
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How does this valve work?
It’s a direct-acting pneumatic globe valve for double-acting cylinders; it’s probably NPS 1/2. The shiny valve body seems to be made of 316 material
How does this work?
It operates on the same principle as a regular stop valve, with a conical seal for the valve element. The special aspect lies in whether there are any requirements regarding temperature, corrosion resistance, etc.; this is mainly reflected in the choice of sealing material. There are few manufacturers in China that produce this type of product, so it is likely imported
This is a pneumatic angle seat valve; the best brand for such valves is BURKERT from Germany. The one shown by the poster seems to be a copy of Gemü’s product.
This type of valve is similar to a globe valve, but its main feature is its high flow capacity. It’s much larger than a regular stop valve.
Pneumatic double-acting stop valve, threaded connection
It comes with a pneumatic actuator (which is a double-acting cylinder) to drive the valve stem and open or close the valve; an electromagnetic valve is required for it to function properly