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Oil Tank Mixing

Oil Tank Mixing using Transvac Jet Mixers

Tank Jet Mixing are mass momentum exchange devices that use pressurised liquid energy, provided by an external recirculating Pump, to entrain, mix and pump a secondary in-tank liquid to achieve bulk mixing. The principle is used for many applications in the oil & gas industry including blending, solids suspension, dilution, heat distribution, pH control, temperature control and homogeneity.


Our core capabilities


  • In-house process design, mechanical design and manufacture of Jet Mixers
  • In-house CFD Analysis to determine the optimum Jet Mixer layout
  • Various material options available to suit the process
  • Manifold design and supply
  • Jet Mixer supports design and supply



In operation, pressurised motive liquid is discharged through the Jet Nozzle into the suction chamber. The change from pressure energy to kinetic energy (velocity) creates a region of low pressure that entrains liquid from within the Tank via open suction ports. The motive and suction liquid streams combine and mix under high shear conditions in the Jet Mixer Diffusers and the resulting intimately mixed fluid is discharged into the bulk of the Tank liquid as high velocity turbulent jets.



Each Tank Jet Mixing system is custom designed to suit the mixing requirements and single or multiple Jet Mixer arrangements are available. Transvac Jet Mixers are often supplied with an angle-creating, flanged spool to direct flow through a Tank wall or are mounted on an in-tank manifold to evenly distribute the mixing energy.


Standard Transvac Tank Jet Mixing systems entrain 3-parts suction liquid for every 1-part motive liquid.


The size, number of Jet Mixers required, and system layout depends on the Tank volume, mixing time, temperature, liquid compositions and mixing duty.


Transvac can supply Jet Mixers only with support spools or in-tank manifolds. Alternatively, Transvac can provide manifold designs, which can be made locally.

Typical Applications / Fluids


  • Oil
  • Diesel
  • Blending of lube oils on petroleum plant
  • Pygas
  • Oil sludge
  • C9+
  • Equalisation
  • Petroleum

Advantages of Tank Jet Mixers

No moving parts inside the tank

Virtually maintenance free once installed

Quick mixing times (3-Parts Suction within the tank to every 1-Part Motive fluid)

Custom designed to suit specific fluid properties and Tank geometry

Suitable for suspension of solids and mixing sludges

No limitation on tank size, multiple mixers can be installed

Can be ‘through-the-wall’ designs, so no access required for installation

Fast-track design, manufacture and deployment available

Computational Fluid Dynamics (CFD)


To prove design concepts for Tank Mixing applications, Transvac’s inhouse CFD specialists often perform advanced Computational Fluid Dynamics (CFD) studies at our state-of-the-art Ejector Centre of Excellence. These studies are used as a proof of concept, to model the required system and verify the necessary mixing and flow regime for critical applications.


Learn more about our CFD capabilities here.