Hydrochloric Acid (HCl) service

Service Selection

Diaphragm Valves for Hydrochloric Acid (HCl) Service

Which diaphragm valves configuration suits Hydrochloric Acid (HCl) (HCl), in which material, to which standard — from real service data, with the pitfalls flagged.

Which diaphragm valves for Hydrochloric Acid (HCl)?

Diaphragm valve (PTFE) - No stem packing leakage path - critical for toxic HCl service Typical service window: Atmospheric to 16 bar, Ambient to 60°C typical.

Recommended Configurations

Diaphragm valve (PTFE)

No stem packing leakage path - critical for toxic HCl service

Body Material for Hydrochloric Acid (HCl)

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

Hastelloy C-276Best alloy choice for all concentrations.Excellent Hastelloy B-3Superior to C-276 for reducing HCl environments.Excellent PTFE-linedInert to all HCl concentrations.Excellent Rubber-lined (natural rubber)Good up to ~35% HCl at ambient temperature.Good PVDF-linedGood resistance below 70°C.Good Carbon SteelRapid attack at all concentrations.Not Recommended SS 316LChloride SCC risk is severe. Avoid.Not Recommended Duplex 2205Chloride SCC risk.Not Recommended

Governing Standards for Hydrochloric Acid (HCl) Service

ASME B16.34 NACE MR0103 API 607 (fire safe)ISO 15848 (fugitive emissions - toxic service)

What to Avoid in Hydrochloric Acid (HCl) Service

Carbon steel or ductile iron bodied valves
Any SS 304 or 316 in contact with fluid
Bronze, brass, copper alloys

Service Considerations

Toxic - ISO 15848 Class A or B fugitive emission requirement
All vents must go to scrubber
No copper alloy in any gasket, stem packing, or instrument connection
Dilution generates significant heat
Vapour phase is as corrosive as liquid - valve bonnet must be lined

Other valve types for Hydrochloric Acid (HCl)

Ball Valves for Hydrochloric Acid (HCl)Butterfly Valves for Hydrochloric Acid (HCl)Gate Valves for Hydrochloric Acid (HCl)

Diaphragm Valves for other services

Diaphragm Valves for Sulphuric Acid (H₂SO₄)Diaphragm Valves for Phosphoric Acid (H₃PO₄)Diaphragm Valves for Nitric Acid (HNO₃)Diaphragm Valves for Slurry - Abrasive Pulp / Mineral Slurry Diaphragm Valves for Demineralised Water (DM Water / Deionised Water)Diaphragm Valves for Ethanol / Industrial Alcohol (C₂H₅OH)Diaphragm Valves for Urea Solution (Carbamide / DEF / AdBlue)Diaphragm Valves for Acetic Acid (CH₃COOH)

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

Failure Modes

Packing Blowout

Products

Diaphragm Valves

Need diaphragm valves for Hydrochloric Acid (HCl) service?

Send your conditions - we confirm the configuration and material for Hydrochloric Acid (HCl) and quote with full certification in 24 hours.

Request a Quote WhatsApp Call

Relevant Products

Vajra Diaphragm Valves

Engineering references

Hydrochloric Acid (HCl) service guideFull compatibility, standards & considerations Vajra Diaphragm ValvesFull range, specs & standards Spec Check engineValidate this spec before the RFQ