Solenoid valve
Thread Content
Figure 1: Schematic of a dual-coil control solenoid. What do the symbols marked in red in this diagram represent? What do the symbols marked with red and green circles in Figures 2 and 3 mean?
It’s the black part of the directional valve, the spring; take a broken directional valve and disassemble it, and then you’ll understand everything
I didn’t explain it clearly enough. What I want to ask is what the symbol in the red-marked area in Figure 1 means? What does the symbol marked by the green line in Figure 2 mean? I can’t understand the markings; even after taking it apart I still don’t get it, and there’s nothing broken on it.
I work in production processes, and when I encounter this type of solenoid valve, if I can understand the symbols on the schematic diagram of the directional control valve, I know how to deal with any faults that arise during production. For example, in the case of a problem with the external air supply or a loss of signal, will the valve maintain its position or still operate?
It is necessary to check whether the valve diaphragm head has a reset function; if it has a reset spring, then it is necessary to determine whether it operates in the fault-open or fault-close mode.
Is the red button on the first two-coil solenoid the manual operation button for the solenoid? In the second image, the indicator circled in red shows that this solenoid valve is a pilot-operated solenoid valve; is what’s inside the green line the indicator for the manual operation button?
Figure 1 should be controlled by two solenoid valves, right? The area inside the red circle is probably for manual locking; not sure. In Figure 2, the red circle shows the spring and air supply circuit; it is in the power-off control state, while the part below represents the powered state. The green circle represents the iron core, right? I posted this to learn*; those who have used it can share details
This post was last edited by Polar Wind on 2017-10-20 at 17:14. Thank you; I think what is stated in Image 1 is correct. I’m not sure whether it’s manual or automatic locking – it seems to be automatic locking； Is the green-marked area in Figure 2 manual operation? Could you please take a look at another post as well—the one about pneumatic valves! Thank you!
Figure 1: Dual-core, dual-coil design without springs; the solenoid valve does not operate when powered off. The red mark indicates the manual switch； You can check by using two pairs of wires to confirm. Figure 2: Dual-core single coil with a spring; the spring comes into play when the solenoid is powered by mains electricity. The green ones are marked as manual switches. You can check by seeing if they are aligned. When production is completely halted and the operation of the valves does not affect the system performance, a manual switch test can be conducted; check Figure 1 to see whether the manual switch is operated using a flat-head screwdriver.
Thank you! Exact reply: The two manual switches in Figure 1 can be operated using a flat-head screwdriver. If you have time, please take a look at my other post; it’s about pneumatic valves--