Plug Valve — Acids
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LibertyCES has documented Plug Valve in Acids service, including Hydrofluoric Acid, Sulfuric Acid and Acetic Acid. Documented models include Crane CPE/XOMOX Sleeved Plug Valve. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Notes from the vendor documentation
Dedicated HF-service product variants (Low Emission HF4D, Tertiary Top Seal) endorsed by UOP/ConocoPhillips for HF Alkylation Units.
Materials documented for this service
- Sleeve materials undisclosed ("upon request")
- Carbon Steel/CF8M/Nickel Alloys body
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| Low Emission HF4D size & rating | 1/2"-12", Class 300, -20°F to 500°F, first soft-seated sleeved plug valve meeting ISO 15848-1 AND API 641 with zero packing adjustments during thermal cycling | Crane ChemPharma & Energy — XOMOX Tufline/Tuflin Sleeved Plug Valves |
| Tertiary Top Seal endorsement | Design listed/approved by UOP and ConocoPhillips Petroleum Company for HF Alkylation Units, Class 300 & 600 DR, EPA Method 21 + API 607 certified | Crane ChemPharma & Energy — XOMOX Tufline/Tuflin Sleeved Plug Valves |
| Barstock named chemistry list | Explicit chemistry list includes sulfuric acid, hydrochloric acid, acetic acid, caustics; sizes 1/2"-2", Class 150/300/600, -20°F to 600°F | Crane ChemPharma & Energy — XOMOX Tufline/Tuflin Sleeved Plug Valves |
| SR named application | Sulfuric Acid Alkylation explicitly named, meets API 641 with zero packing adjustments across 3 thermal cycles | Crane ChemPharma & Energy — XOMOX Tufline/Tuflin Sleeved Plug Valves |
HF4D's 4th sealing barrier (4D stem packing) and HF Detection Paint option exist because an undetected HF leak is a serious safety event — a real, named leak-detection feature specific to hydrofluoric acid alkylation service, not a generic accessory.
UOP and ConocoPhillips approving the Tertiary Top Seal's design for HF Alkylation Units is a named-customer engineering endorsement that doesn't appear anywhere else in this vendor's catalog — on a chemistry where an undetected leak is a real safety event, that's worth more than a pressure rating alone.
Every material and product claim on this page traces to real, vendor-published documentation on file with LibertyCES. Chemical compatibility depends on exact concentration, temperature, and duty cycle — confirm current specifications with the manufacturer and request a spec review before final specification.
FAQ
Can Plug Valve handle Acids?
Dedicated HF-service product variants (Low Emission HF4D, Tertiary Top Seal) endorsed by UOP/ConocoPhillips for HF Alkylation Units.
What wetted materials should Plug Valve use in Acids service?
Materials documented for this service: Sleeve materials undisclosed ("upon request"), Carbon Steel/CF8M/Nickel Alloys body. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Acids chemicals does this cover?
Named chemicals in this documentation: Hydrofluoric Acid (dedicated HF4D/Tertiary Top Seal line), Sulfuric Acid, Acetic Acid, Phosphoric Acid.
Which Plug Valve models are documented for Acids?
Documented examples include Crane CPE/XOMOX Sleeved Plug Valve — HF4D, Tertiary Top Seal (Hydrofluoric).
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated