Urea Solution (Carbamide / DEF / AdBlue) service
Service Selection
Diaphragm Valves for Urea Solution (Carbamide / DEF / AdBlue) Service
Which diaphragm valves configuration suits Urea Solution (Carbamide / DEF / AdBlue) (CO(NH₂)₂), in which material, to which standard — from real service data, with the pitfalls flagged.
Which diaphragm valves for Urea Solution (Carbamide / DEF / AdBlue)?
Diaphragm Valve (SS 316L, PTFE diaphragm) - Concentration control in DEF/AdBlue blending and dosing systems Typical service window: 1 barg (DEF/dilute) to 150 barg (urea synthesis loop), Ambient (DEF) to 200°C (synthesis loop).
Recommended Configurations
Diaphragm Valve (SS 316L, PTFE diaphragm)
Concentration control in DEF/AdBlue blending and dosing systems
Body Material for Urea Solution (Carbamide / DEF / AdBlue)
Rated from real compatibility data - click any material for the full decision page.
Governing Standards for Urea Solution (Carbamide / DEF / AdBlue) Service
What to Avoid in Urea Solution (Carbamide / DEF / AdBlue) Service
- Carbon steel valves for any concentrated urea
- Cast iron valves
- Bronze in high-concentration urea at elevated temperature
Service Considerations
- Urea synthesis loop: extreme conditions - 150–200 barg, 180–200°C - requires pressure-seal bonnet gate valves
- Heat tracing mandatory on concentrated urea lines to prevent crystallisation
- Jacketed valves used for molten urea to maintain temperature
- DEF/AdBlue: HDPE or SS 316L only - copper, brass, zinc cause urea decomposition
Other valve types for Urea Solution (Carbamide / DEF / AdBlue)
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Reviewed by Process Engineering, Vajra Industrial SolutionsDiscipline: Process & Fluid Service EngineeringLast reviewed: 20 June 2026
Connected Engineering
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