Discussion on pneumatic circuit instruments
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What’s that thing next to the limit switch called? For example, when power is supplied to the solenoid valve, the shaft of the actuator rotates; the cam then presses against something located next to the limit switch. What happens then?
What you are describing is likely the mechanical limiter in a pneumatic actuator. A mechanical limiter is a device used to restrict the travel of a pneumatic actuator; it is usually installed at both ends of the cylinder. When the cam presses against the limiter, the cylinder stops moving, thereby enabling accurate position control. .
It’s the travel switch. However, this direct gas supply pipe is likely not intended to output a dry contact signal, but rather to directly modify the gas path
Could you introduce what kind of functional valve it is from which manufacturer? Study* study!* It just seems like he isn’t very smart; there’s probably room for improvement in P!
Those with contacts are metal switches; if they have a plastic cover that forms an integral part of the design, then Pfeiffer’s sensors are usually used. For more details on the working principle, you can check their official website
That’s right; the purpose of this feature, which is installed on the valve, is to conduct partial stroke tests on pneumatic valves. By pressing the green button on the panel, the actuator moves, and the cam comes into contact with the limiter cylinder, causing it to stop moving. In the image, the cam reaches the position where it touches the limiter around halfway through the valve’s stroke. The advantage of this is that it allows for testing and inspection of valves that remain open for extended periods without being used frequently, to determine whether the valve core is stuck. This approach does not interfere with the flow of fluid in the pipeline, while still enabling assessment of the valve’s reliability.
Is that travel switch a pneumatic travel switch? Haven’t seen it before