Cylinder issues
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How should this cylinder be understood? Is it single-acting or double-acting? How is a two-position three-way solenoid valve controlled in a double-acting system? This probably can’t be achieved. If it’s a single-acting type, why are the connections made at two separate positions, one on top and one at the bottom of the cylinder? (The previous one seems to not have been uploaded as an image.)
These are two single-acting actuators acting on the valve together.
Below is a single-acting actuator that operates in sync with the actuator above, increasing the torque on the drive shaft and thus improving the speed at which the valve opens and closes.
This clearly shows whether it’s a single-acting type or not. Look carefully – there is definitely a label on the cylinder preventing you from removing it casually. If it’s taken apart, it will be killed by the spring.
Below is a single-acting actuator that operates in sync with the actuator above, increasing the torque on the drive shaft and thus improving the speed at which the valve opens and closes.
Separately, it is obvious that the one above is single-acting. How did you tell it was the one below? Only large air chambers can hold springs.
It must be a single-acting type with a spring; judging from the appearance of the cylinder, it seems to be of domestic manufacture. Was the air circuit modified later on, by adding an air supply at the spring end in order to increase the speed of operation?
This actuator is a single-acting actuator; a two-cylinder design is used to increase torque, and this type is commonly seen in fork-type actuators utilized on valves that require high torque
The AW type cylinder has two ports for intake and exhaust; it can be determined from the diagram that it is a single-acting cylinder. Please don’t disassemble it and try to figure it out randomly; these cylinder springs have tremendous force and can kill a person
Single-acting, solenoid valve + pneumatic amplifier