The Wringing Separator defines a new standard for separation of solid/liquid particles from a gas

Correct operation of plants calls for the elimination of all solid and/or liquid contaminants from the gas to be treated. To date, this process was executed using conventional technology that relies on filters or cyclone or inertial separators. The Wringing separator is different.

In the case of filtration techniques, impurities can build up and clog the filters, thus reducing their efficiency. This leads to a need for constant maintenance, and above all filter replacement and disposal are required, as well as the management of replacement parts and the coordination of personnel, equipment and vehicles. Traditional cyclone and inertial separators are subject to erosion, they require a constant flow rate and offer only moderate efficiency. Wringing separators are designed to remove solid and/or liquid particles from a gas, rendering it dry but not dehydrated, and free of technically significant pollutants. The particles are separated through its complex internal fluid dynamics that generates a series of virtuous currents: which is why the efficiency of the WRINGING separator remains steady for all flow rates up to the design maximum. The separated particles are collected in the bin – and emptying this bin is the only maintenance required for the WRINGING separator. Something that can also be automated.

How the Wringing Separator works

The Wringing unit is a filterless static separator. The Wringing Separator does not use cyclone, inertial or centrifugal technology. The operating principle of the Wringing separator is completely new, based on the use of the boundary layer current generated by the main flow along walls of a spiral duct. Said current is maintained strictly adherent to the walls of the duct lapped by the gas flow. The separator’s geometry creates the necessary conditions for the solid and/or liquid particles entrained in the flow to accumulate within the boundary layer current; said current transfers the particulate and deposits it on the base of the plenum from where it cannot recirculate back to the main flow.
Once the contaminant has been expelled, the finest portion (< 5µm) is sucked in by a vortex that forms below the discharge disk in the central area, and, from here, it is expelled downwards by means of a descending current in the centre of the vortex.

The vortex is the result of a system of ascending currents created by the path imposed on the secondary current towards the outlet.

Since the system is based on the existence of a boundary layer current maintained perfectly in adherence to the walls, separation efficiency remains absolutely constant at all inlet flow rates up to the maximum design flow rate. For this reason, the separator must always be sized to handle the maximum effective volumetric flow rate that can be produced in the plant.

The WRINGING separator can treat any type of gas, at any pressure and temperature, separating 99% of solid and/or liquid particles from 1 micron up.
Compatible with the following sectors:

  • Power generation
  • Petrochemicals
  • Oil & Gas
  • Gas treatment, storage and transport over long distances
  • Compressed air treatment
  • Ecology: Smoke treatment and dust reduction
  • Protection of process and push compressors, turbine protection
  • Co2 Sink plants with low environmental impact for the capture of carbon dioxide
  • Sub Sea and new deep water solutions, where the lack of maintenance of the WRINGING Separator allows you to stay in constant operation for decades without any stop.

The fact that the Wringing separator is maintenance free means that it can remain in constant service for years with zero downtime Each separator is a one-off unit built to the customer’s specifications. Just one more reason why the Wringing system has become the new benchmark in the field of separation.


The efficiency of a given separation technology is measured by considering the size of the solid and/or liquid contaminants that it is able to remove.
Efficiency of the Wringing separator is constant:
it removes 99% of particles of dimensions greater than or equal to 1 micron.

Numerous tests show that in traditional technologies, separation efficiency is drastically reduced for contaminant particles smaller than 5 microns.
The Wringing Separator however does not suffer from this limitation.


The separation efficiency of a traditional separator changes as the flow rate varies, whereas the efficiency of a Wringing separator is constant.

High operating FLEXIBILITY means that Wringing separators perform their function constantly, irrespective of changes in the incoming gas flow rate.

Thanks to the internal fluid dynamics, the separation currents are formed immediately, as soon as gas is fed into the inlet.

Low cost

The Wringing separator offers four-fold economy: no need for replacement parts, maintenance-free, no downtime, and constant efficiency through time. Purchase cost, size and weight are all lower than a traditional two-stage separator.

In addition, since the Wringing system does not require maintenance with the associated removal from service, there’s no need to install a second, stand-by separator.

With the Wringing system there’s no waste materials requiring disposal, except the accumulated particulate: this is a further advantage in terms of environmental impact and associated costs (disposal, labour, storage and transport of replacement consumables).


The Wringing operating principle makes it possible to build a highly diversified range of separators in terms of application and dimensions: from a minimum of about 10 cm to diameters of more than 2 metres for gas pipelines, plant protection systems, or treatment of industrial fumes emissions. For high flow rates, multiple configurations can be created by paralleling several separators.

Examples of applications

1. Removal of solid particles

Greenstream Pipeline Lybia/Italy

Black powder Removal at Mellitah-Lybia compression station

Saudi Aramco

Yanbu refinery Wringing Separator is installed for black powtder removal to protect boilers.

Marafiq Jubail

black powder removal to protect gas turbines.

2. Removal of liquids

Wringing separator installed as production and lts separator
Liquids removal to protect gas compressors
Removal of condensate and oil to protect the compressors

3. Removal of mixed liquids and solids

Total Sendji & Yanga
At wellhead for liquids mixed with solids removal to protect gas compressors
Solid mixed with water removal to protect gas compressors
Marafiq Yanbu

Removal of black powder mixed with condensate to protect gas turbines


Wringing separator

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P.Iva 06090820967
© Wringing Italia 2023

Privacy & Cookie Policy