hazardousClO₂CAS 10049-04-4
Valves for Chlorine Dioxide (ClO₂) Service
Chlorine dioxide is a powerful oxidising biocide used in pulp and paper bleaching (replacing elemental chlorine), municipal drinking water treatment, and food plant sanitisation. It is generated on-site (never stored in large quantities due to explosion risk) at concentrations of 1–10 g/L. ClO₂ is an extremely aggressive oxidiser - more so than chlorine - attacking nearly all metals and many polymers. Valve and pipeline materials must be limited to titanium, PVDF, FRP, or PTFE-lined constructions.
Pressure Range
1–8 barg (generation and distribution)
Temperature
Ambient (5–40°C - ClO₂ is unstable at elevated temperature)
Industries
Pulp & paper bleaching, Municipal water treatment, Food plant sanitation
What valves are used for Chlorine Dioxide (ClO₂) service?
PVDF-lined Butterfly Valve are recommended for Chlorine Dioxide (ClO₂) service: Most commonly used for ClO₂ distribution in pulp bleaching and water treatment.
Key Properties - Chlorine Dioxide (ClO₂)
- Extremely aggressive oxidiser - more reactive than chlorine gas
- Yellow-green gas with characteristic pungent odour at >0.1 ppm - toxic and explosion risk
- Generated on-site only - never bulk stored (explosion/fire risk above 10% in air)
- Attacks CS, SS 304, SS 316, most rubbers, and many polymers
- Used at 1–10 g/L in pulp bleaching; <4 mg/L in water treatment
Vajra Industrial Solutions manufactures and supplies valves for Chlorine Dioxide (ClO₂) service — including pvdf-lined butterfly valve — in corrosion-appropriate materials selected for the operating conditions described here, with full material and test documentation.
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Material Compatibility - Chlorine Dioxide (ClO₂)
Ratings are indicative. Actual compatibility depends on concentration, temperature, velocity, and presence of contaminants. Always consult corrosion tables or a materials engineer.
| Material | Rating | Notes |
|---|---|---|
| Titanium Gr 2 | Excellent | Best metallic choice for all ClO₂ concentrations. |
| PVDF | Excellent | Best polymer material - resistant to ClO₂ across all concentrations. |
| Hastelloy C-276 | Good | Acceptable for dilute ClO₂ service. |
| SS 316L | Poor | Pitting and SCC in ClO₂ - not recommended except for very dilute solution. |
| Carbon Steel | Not Recommended | Rapidly oxidised by ClO₂. |
Recommended Valves
PVDF-lined Butterfly Valve
Most commonly used for ClO₂ distribution in pulp bleaching and water treatment
Full selection guidePVDF-lined Ball Valve
Isolation and control of ClO₂ dosing - zero metal exposure to ClO₂
Full selection guideTitanium Ball/Butterfly Valve
For high-pressure or elevated-temperature ClO₂ service
Full selection guideDiaphragm Valve (PVDF body, PTFE diaphragm)
Precise dosing control in ClO₂ generation and distribution systems
Full selection guideValves to Avoid
All carbon steel valves
SS 316 valves for concentrated ClO₂
NBR or EPDM-seated valves
Special Considerations
Applicable Standards
Shop Valves for Chlorine Dioxide (ClO₂) Service
Other Fluid Services
Chlorine Dioxide (ClO₂) Service — Procurement & Specification
Typical Applications
Available Standards
Material Options
Documentation Available
- -EN 10204 3.1 Material Test Certificates (heat traceable)
- -API 598 hydrostatic shell & seat test reports
- -Dimensional inspection reports
- -Full Manufacturing Data Record (MDR) / data book on request
Inspection Options
- -In-house QC inspection on every order
- -Third-party inspection (SGS / Bureau Veritas / TÜV / DNV) coordination
- -Witness and hold points accommodated on request
Order Quantities
Flexible — from single critical-spare valves to full project lots.
Export
Worldwide export with complete documentation (COO, EUR.1, packing lists) to 20+ countries.
Custom Engineering
Built to your specification — materials, trim, pressure class and special service (NACE, fire-safe, IBR, cryogenic).
Delivery Support
Dispatch from Vadodara, Gujarat with documented lead times and priority handling for urgent requirements.
Engineering references
Connected Engineering
Need Valves for Chlorine Dioxide (ClO₂) Service?
Tell us your fluid, pressure, and temperature — we'll recommend the right valve, material, and standard, with a 24-hour quote.