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Mesh Type Pre-conditioners, like mesh pads utilised for demisting applications, typically comprise a pad of knitted wire (the “mesh”) supported by a framework (weld mesh or grid). They are utilised when either a high separation efficiency and/or a high turndown ratio is required. As pre-conditioners, they are positioned upstream of the demisting device and can be utilised in any configuration in horizontal and vertical separators.

The difference between the Mesh Type Pre-conditioner and a Mesh Type Demisting Device is that the pre-conditioner is designed to operate at about three times the gas velocity used for a Mesh Type Demisting Device. This means that it operates in a flooded condition, which has the effect of enlarging the sizes of the droplets, thereby increasing the amount of liquid removal within the downstream demisting device and improving the efficiency of the gas/liquid separation process.

At low flows, the Mesh Type Pre-conditioner takes over from the downstream demisting device and itself acts as the demisting device. In this situation, it no longer operates in the flooded condition but reverts back to its role as a Mesh Type Demisting Device.

Further, since it provides a pressure drop prior to the demisting device, any flow mal-distribution at the face of the Mesh Type Pre-conditioner will be significantly reduced before it reaches the demisting device, again offering benefits to the gas / liquid separation process.

Please note that we do not recommend the installation of Mesh Type Pre-Conditioners where fouling or blockage is possible. Instead, for fouling or dirty duties, we recommend the use of our proprietary ZP-090 Vane Type Pre-conditioner.

Advantages of a Mesh Type Pre-conditioner:

  • Increases the gas / liquid separation efficiency
  • Improves the flow distribution on the face of the downstream demisting device
  • Provides a wide operational range with a high turndown ration ≥ 10:1
  • Available in various shapes and orientations
  • Can be supplied in various materials
  • Has relatively low installed cost
  • Easy to install in both new and existing separators
  • No moving parts, so no maintenance (for clean duties).

Applications of a Mesh Type Pre-conditioner:

  • Production Separators
  • Test Separators
  • Gas Scrubbers
  • Gas Knock-out Drums
  • Slug Catchers
  • Flash Drums
  • Process Vessels and Columns
  • Floating Production Units (FPUs).

Euromesh BV

With over 40 years industrial experience, Euromesh® BV is a leading force in separation technology. Products are manufactured under controlled conditions and can be supplied in accordance with any international design or material standard or customised to specific requirements. Euromesh products are used in many branches of industry and are specifically designed to fit for purpose. Euromesh BV is a member of the Zeta Group.

The company is located in Sliedrecht, the Netherlands, in the centre of one of the most important European industrial areas, close to Amsterdam International Airport and to the main seaports of Rotterdam and Antwerp. A comprehensive range of separation equipment, process internals and wire mesh products are manufactured, both for the domestic market and for export world-wide. Euromesh is staffed by experienced design and process engineers. With state-of-the-art production facilities and a strict quality management system a high level of quality and service is assured throughout sales and production stages.

Separation equipment:

  • Mesh demisters
  • Vane-packs
  • Cyclone demisters
  • Mesh coalescers
  • Plate-pack coalescers
  • Pre-conditioners
  • Separators.

Process Internals:

  • Column, Sieve- and Bubble cap trays
  • Random packing, in metal / plastic and ceramic
  • Collectors & Distributors
  • Column internals (V-wire)
  • Inlet devices
  • Support grating
  • Reactor screens
  • Perforated plates.

Industrial equipment:

  • Exhaust silencers
  • Shock and vibration components
  • Filters and filtration equipment
  • Air / grease filters
  • Spark devices
  • Flame arrestors
  • Soot collectors
  • Spray nozzles
  • Knitted wire mesh
  • Woven & weld mesh.

Case Studies

Dulang (Malaysia)

Discovered in 1981, Dulang is a major oil field in the Malay Basin. Located 130 km off the east coast fo Malay Peninsular in depths of 76 m the Dulang field is approx. 24 km long and 3.5 km wide. It is owned jointly by Petronas Carigali Sdn. Bhd and Esso Production Malaysia Inc.

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