I need to choose some valves for a neutralization plant involving Hcl Acid(30%, T°30C) pipes and NaOH (30%, T°45°C) pipes. The operating pressure is 6 Bars.
I'd like to know the pros and cons for using plastic valves vs lined metallic valves (linned with PTFE or any other thermoplastic).
In my mind, i think plastic valves are les expensive but the are less rugged than metallic valves. I think also that high temperature (45°C) can affect plastic valves life.
Am i wrong or right? Is there a possibility that plastic valves could be use in such application?

I need to choose some valves/buttterfly valves for a neutralization plant involving Hcl Acid(30%, T°30C) pipes and NaOH (30%, T°45°C) pipes. The operating pressure is 6 Bars.

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