Can anyone explain how to control this?

The air circuit nameplate in the second photo is very clear. You will understand after looking at it more and thinking about it.

To accurately explain how a control valve's air path is routed requires specific knowledge of the type and purpose of the control valve, as well as how it is connected and the system in which it is located. There are many types of control valves, such as pneumatic control valves, hydraulic control valves, electric control valves, etc., and their control principles and gas circuit (or liquid circuit, circuit) directions are different. Generally speaking, pneumatic control valves are probably one of the most common types of control valves and are used in a variety of industrial applications. It uses compressed air as a power source to regulate the flow of fluid. A basic pneumatic control valve system includes the control valve body, positioner, actuator and pipeline connecting the air source. If we are talking about a pneumatic control valve, then its pneumatic control can probably be described as follows: 1. Compressed air source: The air source that provides power generally needs to be pressure regulated and filtered to ensure air quality and stable output pressure. 2. Pipe connection: The control gas is piped from the gas source to the positioner and/or actuator. 3. Locator: Receives signals from a control system (such as PLC or DCS) and converts the signals into compressed air control of the actuator. 4. Actuator: According to the instructions of the positioner, the control valve is driven to open or close by changing the supply of compressed air, thereby regulating the fluid flow through the control valve. 5. Control valve body: The main part through which the fluid passes, the switching and adjustment of the valve depend on the action of the actuator. The entire process requires precise control and coordination to ensure that the flow rate, pressure or temperature of the fluid can be adjusted according to process requirements. However, this is just a very basic description and actual control valves can be more complex with a variety of additional features and components. If you can provide more specific information, such as the control valve model, usage scenarios, existing connection drawings, etc., I can give a more detailed explanation. .

Depending on the leader's tone, you never know whether the leader will do it or not. ox

I can't see clearly, but I guess one solenoid valve controls the air intake and shutoff, and the other two solenoid valves are dual-controlled on and off. The valve's atmospheric path needs to be enlarged.

This is a single acting spring return fork type pneumatic valve: When the 2-position 3-way solenoid valve coil is energized, the inlet air source port and air outlet of the solenoid valve (white stainless steel ASCO solenoid valve) are connected. The connected gas serves as the control air source for the two 2-position 3-way air-controlled reversing valves (the ones in the picture), making the two 2-position 3-way air-controlled reversing valves (the two black ones in the middle is the reversing valve) action, that is, the air source interface (relatively thick air source pipe) of the pneumatic control reversing valve is connected to the air outlet, and enters the cylinder through two 2-position 2-way air control valves (the valve is open at this time, and the top two are 2-position 2-way air control valves), and the movement of the fork is pushed to drive the valve to open or close. When the solenoid valve loses power, the gas in the cylinder is relieved through the pressure relief ports of the two 2-position 3-way air-controlled directional valves. The spring reset pushes the fork movement to drive the valve to close or open. When the total air source loses air or the total air source pressure is low, the two 2-position 2-way air control valves are closed to maintain the position. The air path is not complicated.

What the leader said is right. It is clearly marked on the picture and is provided below for reference. The valve number: 342-HV-10802 1. The valve opening and closing is controlled by the solenoid valve. The valve closing speed can be controlled by adjusting 6a and 6d, and the valve opening speed can be adjusted by adjusting 6b and 6c. 2. When the air source pressure is lower than a certain value, the valve will maintain its position, that is, if the air source fails, it will maintain its position. The valve may then reach a faulty position over time.

The previous analysis was based on the drawings. After looking carefully at the actual object, it is not exactly the same as the drawings. Let’s continue analyzing the drawings first: 1. Dual air intake and 2 air sources, both of which are fed into the cylinder, ensure the amount of air supplied into the cylinder and move quickly. The 2 air sources must come from the same main pipe, which is not shown in the actual picture. Under normal circumstances, if one circuit fails and loses air, the other circuit will also fail and lose air. However, after reaching the valve, the two air sources have different functions besides supplying air. 2. The air source on the right side of the drawing is when the air source fails (the setting of the lock valve is lower than a certain value as mentioned earlier), 10a and 10b will act to lock the air in the cylinder to maintain the position. Over time, the gas pressure in the cylinder will gradually decrease, and the valve position will also reach the fault position. 3. As long as the air supply on the right side is normal, the valve switch is controlled by the solenoid valve, with 2-way air intake and 2-way exhaust (6a, 6d). 4. If the air source on the left fails, even if the solenoid valve is energized, the air loss caused by the air source failure will cause the exhaust from 2 channels (through 4), causing the valve to reach the fault position. 5. From the above analysis, it can be seen that it is not a redundant configuration. There is only one solenoid valve. Analysis of other components: Even if there is no air intake or exhaust in one channel, it may not be satisfactory to rely on one channel to ensure

There is an action time requirement. It is estimated that there are 2 air inlets in the cylinder, so 2-way air inlets are used.； Regarding the lock valve mentioned in the air circuit, if you have the conditions, you can take a closer look and play around with it. It may be misleading. This is the only one in the air circuit diagram that does not include a specific brand and model. Unless the air at your site suddenly loses air, if the air pressure slowly decreases, these two lock valves may be 2-position, 2-way air control valves. They cannot maintain their position when the air pressure slowly drops.