Ball Valve — Caustics/Bases
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LibertyCES has documented Ball Valve in Caustics/Bases service, including Sodium Hydroxide. Wetted materials to confirm: PVDF/PP/CPVC and Ultem GF40%. Documented models include Hayward TBH and Crane FK Soft Seated Ball Valve. Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a free spec review.
Notes from the vendor documentation
Hayward chemfeed resistance table rates most thermoplastics 'A' for sodium hydroxide.
Materials documented for this service
- PVDF/PP/CPVC (Excellent)
- Ultem GF40% (Excellent)
Products cited for this service
Real Specifications
| Spec | Value | Source document |
|---|---|---|
| Sodium Hydroxide 20% material ratings (Hayward chemfeed table) | CPVC, PP, PTFE, PVC, PVDF, Hastelloy-C all rate A; EPDM rates B (derates to C per the vendor's own fully-wetted-elastomer rule); Viton rates C | Hayward Flow Control — Chemfeed Product Solutions Guide |
| Calcium Hydroxide material ratings | CPVC, PP, PTFE, PVDF, EPDM, Viton, Buna-N, Hastelloy-C all rate A; PVC and 316SS rate B | Hayward Flow Control — Chemfeed Product Solutions Guide |
Hayward's own derate rule matters here: valves with elastomers fully exposed to process media must be derated one full level from the table's baseline rating, so EPDM's B on 20% sodium hydroxide reads as a C once that rule is applied, not a straight B.
Sodium hydroxide is one of the more forgiving chemistries in Hayward's table — most thermoplastics rate A — but the vendor's own derate-for-wetted-elastomer rule is the detail a straight spec-sheet read misses.
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 Ball Valve handle Caustics/Bases?
Hayward chemfeed resistance table rates most thermoplastics 'A' for sodium hydroxide.
What wetted materials should Ball Valve use in Caustics/Bases service?
Materials documented for this service: PVDF/PP/CPVC (Excellent), Ultem GF40% (Excellent). Compatibility depends on exact concentration, temperature and duty cycle, so confirm with a spec review before final specification.
Which Caustics/Bases chemicals does this cover?
Named chemicals in this documentation: Sodium Hydroxide.
Which Ball Valve models are documented for Caustics/Bases?
Documented examples include Hayward TBH, Crane FK Soft Seated Ball Valve.
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Reviewed by James Riggins, 30+ years specifying water and chemical process equipment · Updated