In the PID diagrams of chemical plant processes, do valves such as pneumatic valves require separate compressed air pipelines? ? ...
Thread Content
In the PID diagrams of chemical plant processes, do valves such as pneumatic valves require separate compressed air pipelines? ? Seek an answer
A control valve operates using instrument air as power
Yes, it’s a separate compressed air pipeline, but it needs to have water and oil removed as well as its pressure reduced
Well, yes, some still require buffer tanks
Instrument air is a separate system with its own design standards and quality specifications; it must be deoiled, dried, and filtered, with a pressure of generally 0.7 MPa.