What material should a globe valve for Demineralised Water (DM Water / Deionised Water) be?

SS 316L (Excellent): Standard material for DM water service - no iron contamination, corrosion-resistant. SS 304 (Excellent): Acceptable for most DM water service; 316L preferred for hot or higher-purity applications. Duplex SS (Excellent): Overkill for most DM service but used in pharmaceutical ultrapure systems. PTFE-lined (Excellent): Zero contamination - preferred for semiconductor and ultra-high purity DM water.

Demineralised Water (DM Water / Deionised Water) service

Service Selection

Globe Valves for Demineralised Water (DM Water / Deionised Water) Service

Which globe valves configuration suits Demineralised Water (DM Water / Deionised Water), in which material, to which standard — from real service data, with the pitfalls flagged.

Which globe valves for Demineralised Water (DM Water / Deionised Water)?

Globe Valve (SS 316L) - Flow control and throttling on DM water supply lines and chemical dosing. Typical service window: 3–120 bar (boiler feedwater up to drum pressure), Ambient to 250°C (boiler feedwater at operating temperature).

Recommended Configurations

Globe Valve (SS 316L)

Flow control and throttling on DM water supply lines and chemical dosing.

Body Material for Demineralised Water (DM Water / Deionised Water)

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

SS 316LStandard material for DM water service - no iron contamination, corrosion-resistant.Excellent SS 304Acceptable for most DM water service; 316L preferred for hot or higher-purity applications.Excellent Duplex SSOverkill for most DM service but used in pharmaceutical ultrapure systems.Excellent PTFE-linedZero contamination - preferred for semiconductor and ultra-high purity DM water.Excellent Carbon SteelCorrodes rapidly in aggressive DM water. Acceptable only with pH control and oxygen scavenging.Fair Bronze/BrassZinc dezincification and copper leaching - avoid for DM water where purity matters.Poor

Governing Standards for Demineralised Water (DM Water / Deionised Water) Service

ASME B16.34 ASME B31.1 (power piping)ISPE Baseline Guide (pharmaceutical)

What to Avoid in Demineralised Water (DM Water / Deionised Water) Service

Cast iron or carbon steel bodies (iron contamination and rapid corrosion in aggressive DM water)
Bronze or brass valves (zinc/copper leaching into ultra-pure water)
Valves with dead legs or blind spots where stagnant DM water can concentrate corrosion

Service Considerations

Boiler feedwater (BFW): must meet specific dissolved oxygen limits - deaerator and chemical dosing required upstream of any carbon steel valves
IBR compliance required for any valves in steam-generating systems
Pharmaceutical and semiconductor: electropolished SS 316L internal surfaces, orbital welded joints, no dead legs - specify sanitary or bio-pharmaceutical valve standards (ASME BPE / EHEDG)
DM water storage: must be kept nitrogen-blanketed or in stainless tanks to prevent CO₂ absorption

Other valve types for Demineralised Water (DM Water / Deionised Water)

Ball Valves for Demineralised Water (DM Water / Deionised Water)Diaphragm Valves for Demineralised Water (DM Water / Deionised Water)Check Valves for Demineralised Water (DM Water / Deionised Water)

Globe Valves for other services

Globe Valves for Sulphuric Acid (H₂SO₄)Globe Valves for Chlorine (Cl₂)Globe Valves for Ammonia (NH₃)Globe Valves for High-Pressure Steam Globe Valves for Hydrogen (H₂)Globe Valves for Caustic Soda (NaOH)Globe Valves for Hydrofluoric Acid (HF)Globe Valves for Hot Oil (Thermal Heat Transfer Fluid)

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

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Vajra Globe Valves

Engineering references

Demineralised Water (DM Water / Deionised Water) service guideFull compatibility, standards & considerations Vajra Globe ValvesFull range, specs & standards Spec Check engineValidate this spec before the RFQ