For a two-cylinder control valve, are there 2 sources of control air?
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For a two-cylinder control valve, are there 2 sources of control air?
The main air supply line remains as one path; after passing through various valve accessories such as positioners and selector valves, it splits into two paths that feed into the two cylinders respectively
There can’t be two air sources. Why? It’s simple – it’s impossible to supply air to both cylinders at the same time. Wouldn’t that be like pushing a cart by pushing on both ends? A gas source ball valve, and as mentioned above, it is divided into two paths using some valve accessories; when in operation, one path allows air to enter while the other allows air to exit, thereby driving the valve to function.
There is only one overall instrument air source. A two-cylinder valve necessarily requires two sources of instrument air for operation, which can be achieved using a 2-position 5-way solenoid valve.
One valve and one air source are sufficient. Divide it into two paths entering the cylinder; controlling the intake and exhaust for these two paths is sufficient.
In principle, the air supply remains the same; it’s just that each cylinder has two separate control air supplies