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The hydrocyclone is an axial flow centrifugal separator for liquid-liquid separation, typically used in produced water treatment and oil-water separation. Unlike traditional tangential inlet hydrocyclones, the axial flow design generates swirl in the same direction as process flow using a static swirl element. The resulting centrifugal forces push the heavier water phase outward while the lighter oil phase is forced inward, forming an oil core that reverses direction and exits through a small channel on the reject side. The main water stream exits at the water outlet nozzle, with a flow control valve maintaining proper hydraulic balance. Typically fabricated in duplex stainless steel. TrayTec supplies and installs hydrocyclone assemblies to your vessel geometry and separation requirements.
Axial flow
Medium pressure drop
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The axial flow design generates swirl in the same direction as the process flow rather than through perpendicular tangential inlets. This produces a more stable, aerodynamically efficient swirl pattern that achieves higher centrifugal forces and more consistent separation efficiency across a wider range of flow rates. Contact TrayTec with your process fluid properties and flow conditions to confirm the hydrocyclone configuration for your application.
A flow control valve at the water outlet nozzle provides back pressure that governs the hydraulic balance between the reject stream and the main water outlet. Correct back pressure ensures the oil core remains stable and the reject-to-feed ratio is maintained within design limits. The hydraulic balance must be confirmed across all operating cases including turndown, as imbalance causes either excessive water in the reject stream or oil breakthrough into the water outlet. Contact TrayTec with your operating range to confirm the correct control valve specification.
Hydrocyclones are installed in produced water treatment vessels, deoiling separators, and compact separation systems across upstream and offshore production operations. They are often combined with downstream coalescers or plate pack internals to achieve the required effluent quality in a single vessel. Contact TrayTec with your separation targets and vessel constraints to confirm whether a hydrocyclone assembly is the right solution for your application.
