Sulphuric Acid (H₂SO₄) service

Service Selection

Butterfly Valves for Sulphuric Acid (H₂SO₄) Service

Which butterfly valves configuration suits Sulphuric Acid (H₂SO₄) (H₂SO₄), in which material, to which standard — from real service data, with the pitfalls flagged.

Which butterfly valves for Sulphuric Acid (H₂SO₄)?

PTFE-lined butterfly valve - Cost-effective for large bore, low-pressure dilute acid Typical service window: 0.5–25 bar (7–360 psi) - process dependent, Ambient to 80°C typical; up to 200°C in some processes.

Recommended Configurations

PTFE-lined butterfly valve

Cost-effective for large bore, low-pressure dilute acid

Body Material for Sulphuric Acid (H₂SO₄)

Rated from real compatibility data - click any material for the full decision page.

Hastelloy C-276Excellent across all concentrations. Industry standard for dilute H₂SO₄.Excellent PTFE-linedPTFE is excellent across all concentrations and temperatures up to 200°C.Excellent Carbon SteelOnly for >93% concentrated acid at ambient temperature. Not for dilute acid.Good FRP / PVDF-linedPVDF and FRP good for <80% concentrations.Good SS 316LUp to ~20% at <25°C. Not recommended above 20% or elevated temperature.Fair Duplex 2205Limited to dilute, cold service only. Verify with corrosion data.Fair Ductile IronNot recommended for any concentration.Poor Bronze/BrassSeverely attacked. Never use copper alloys.Not Recommended

Governing Standards for Sulphuric Acid (H₂SO₄) Service

ASME B16.34ISO 15761NACE MR0103 (where H₂S present)API 607 (fire safe)

What to Avoid in Sulphuric Acid (H₂SO₄) Service

Bronze or brass-bodied valves
Standard SS 316 for concentrated acid above 20%
Rubber-lined valves (except EPDM in specific concentrations)

Service Considerations

Always design for double containment or secondary containment
Emergency shower and eyewash must be immediately accessible
Full-bore valves preferred to minimise turbulence and localised attack
Dilution point design must prevent acid-in-water splashback
ATEX rating required where sulphur vapours present

Other valve types for Sulphuric Acid (H₂SO₄)

Ball Valves for Sulphuric Acid (H₂SO₄)Diaphragm Valves for Sulphuric Acid (H₂SO₄)Globe Valves for Sulphuric Acid (H₂SO₄)

Butterfly Valves for other services

Butterfly Valves for Hydrochloric Acid (HCl)Butterfly Valves for Seawater Butterfly Valves for LNG / Cryogenic Natural Gas Butterfly Valves for Caustic Soda (NaOH)Butterfly Valves for Phosphoric Acid (H₃PO₄)Butterfly Valves for Nitric Acid (HNO₃)Butterfly Valves for Cooling Water Butterfly Valves for Brine / Sodium Chloride Solution

Reviewed by Process Engineering, Vajra Industrial SolutionsDiscipline: Process & Fluid Service EngineeringLast reviewed: 20 June 2026

Connected Engineering

Standards

ASME B16.34 NACE MR0175 API 607 Fire-Safe

Services

Products

Butterfly Valves

Comparisons

Ball vs Butterfly Valve

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Relevant Products

Vajra Butterfly Valves

Engineering references

Sulphuric Acid (H₂SO₄) service guideFull compatibility, standards & considerations Vajra Butterfly ValvesFull range, specs & standards Spec Check engineValidate this spec before the RFQ