Questions about solenoid valves and pneumatically controlled valves
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There is an air pipeline on site, with the air source supplying air to both the solenoid valves and the air-controlled valves. The output of the solenoid valve splits into two paths, supplying the two pneumatic control valves; the outputs of these pneumatic control valves lead to the left and right ports of the cylinder. The cylinders and air-controlled valves on site are all quite worn out; the air pathways on them can no longer be seen. I really don’t understand this, so I’ve come here to ask for advice. The air circuit is roughly as shown in Figure 1, with the air control valve replaced by the one shown in Figure 2; Figure 3 is a rough sketch I made. The main issue I don’t understand is that the output of the solenoid valve is divided into two paths, each going to one pneumatic control valve; these control valves are connected to the left and right ports of the two cylinders. How is it possible to control the movement of these cylinders?
It seems to be a piston-type on-off valve. Two three-way solenoid valves control the switching of the air paths for two two-way three-way pneumatic valves; for example, when the instrument air to valve a is connected to the cylinder, the instrument air to valve b is cut off, the cylinder is left without air, and the valve either closes or opens. The same is true in reverse.
The valve schematic on the right side needs to be understood; the schematics of valves in hydraulic and pneumatic systems are all presented in this manner.
Both pneumatic control valves receive the same signal; logically, shouldn’t they perform the same action? Or are there two pneumatic control valves, one for opening and one for closing?
Are the outputs of the solenoid valve divided into two paths, each feeding one pneumatic control valve? I can see that the solenoid valve in Figure 1 has been removed, and since it is a 2-position 3-way valve, there are no two output connections available to connect to a pneumatic module. Connected to the front of the solenoid valve, along with the adjustment knob, is a pressure protector; when the pressure drops below a certain set value, it will drain the air from the solenoid valve’s air circuit, causing the entire valve to operate. The pneumatic module on the left should serve only to facilitate rapid exhaust.
Just connect to a different outlet. It is indeed similar to normally open and normally closed contacts
Which team are you in? Hydrogenation shift?
It looks like a two-position five-way solenoid valve when combined
The top two three-way valves seem to be drawn incorrectly; they should be connected to two pipes