Caustic soda with PTFE

[SukhpalSingh]

Can I use valve lined with Tetrafluoroethylene polymer (Teflon PTFE) and the service is Caustic soda in the following operating conditions:
- Max. temperature: 120 C
- PH: 14
- Flow: 2 m[sup]3[/sup]/h[sup]6[/sup]
- Specific gravity: 1.1174
- Free sodium hydroxide: 162.5 Kg/h
- Sulphate: 33.7 Kg/h
- Water: 1955.2 Kg/h

 

[tom1953]

This reference

https://www.finemech.com/tech_resources/chemical_resistance.pdf

suggests that PTFE should be good for caustic soda (sodium hydroxide) up to 50% and up to 120C.