Vapor Recovery Unit.
CRA Vapor Recovery Units capture vapours displaced during loading, unloading, and tank breathing, recovering up to 98% of VOC content for return to process or fuel gas. Skid-mounted and engineered to CPCB Stage I and OISD storage and handling guidelines.
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Recovering hydrocarbon vapour before it becomes lost product or fugitive emissions.
A Vapor Recovery Unit captures hydrocarbon vapours displaced during tank loading, unloading, and diurnal breathing, preventing fugitive VOC release while recovering the contained product. CRA's skid-mounted units combine a vapour collection header, knockout drum, and a compression or carbon adsorption recovery stage suited to the inlet vapour profile. Recovered vapours return to the connected process or fuel gas network rather than being vented or flared, cutting both emissions and product loss at oil terminals, refinery tankage, and chemical loading bays.
Recovery Efficiency
Up to 98%
Recovery Stage
Compression or carbon adsorption
Mount
Single skid package
Duty
Continuous breathing and intermittent loading surges
What is a Vapor Recovery Unit?
A vapor recovery unit (VRU) captures hydrocarbon vapours displaced during tank loading, unloading, and diurnal breathing, and recovers them for return to process or fuel gas instead of allowing them to vent or be flared to atmosphere.How it works paragraph: Displaced vapours are drawn off through a collection header and pass through a knockout drum before reaching one of two recovery paths, compression-based or carbon adsorption-based, on their way back to process or fuel gas.
How it works
Displaced vapours are drawn off through a collection header and pass through a knockout drum before reaching one of two recovery paths, compression-based or carbon adsorption-based, on their way back to process or fuel gas.
Entrained liquid and condensate are removed from the vapour stream before it reaches the compressor or carbon bed, protecting downstream equipment from liquid carryover.
Diurnal tank breathing produces a steady, low-volume vapour stream while truck and rail loading produce short, high-volume surges. The collection header and recovery stage handle both without bypassing untreated vapour to atmosphere.
Compression and condensation suit higher-concentration, continuous vapour streams. Activated carbon adsorption suits lower-concentration or intermittent streams where outlet limits are tighter.
Recovered hydrocarbons route back to the connected process or fuel gas network rather than being vented or flared, so captured product is reused rather than destroyed.
The single-skid design suits tank farm and loading bay layouts where space around existing infrastructure is limited.
Key Benefits
Recovered hydrocarbons return to the fuel gas network or process stream instead of being flared, turning emissions control into a product recovery stream.
Compression-based and carbon adsorption-based recovery stages are engineered onto the same skid platform, matched to the vapour composition and flow profile at each loading point.
Control logic manages steady tank breathing loads alongside intermittent surges from tanker and rail car loading without operator intervention.
Recovery performance is engineered to support CPCB Stage I vapour recovery norms and OISD storage and handling guidelines, reducing the compliance burden on terminal operators.
Collection header, knockout drum, recovery stage, and controls arrive pre-assembled and pre-wired, cutting site installation and commissioning time.
The CRA Edge
Decades of experience engineering vapour and gas handling systems for terminals, refineries, and process plants across demanding operating environments.
Systems designed to meet CPCB, OISD, and international vapour recovery standards, so your facility stays audit-ready.
Collection, separation, and recovery hardware engineered, fabricated, and tested under one roof, not assembled from third-party subsystems.
Every recovery train is sized against your actual vapour load and composition rather than a generic catalogue spec.
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