Vibrating Screens

Vibraplant manufacture a range of screening equipment which can be configured to process materials from most industrial sectors.  We can provide either static or vibrating screens with either a linear or elliptical vibratory motion as open, semi or fully enclosed units.

Whether you are classifying dry or wet granular material into multiple fractions; scalping off occasional oversize items, de-dusting or de-watering slurries. We will specify and design the equipment to suit the requirements of your application.

The range of screens currently offered include:


Elliptical Vibrating Screens

These are driven by a single vibrator which turns the material as it is gradually conveyed down the length of the screen.  This type of screen is extremely versatile and can be adapted to provide efficient screening solutions for most screening applications including; Scalping, Grading, De-dusting and Washing.

Design options include:

  • Screen sizes up to 2.6m long x 2m wide
  • Mild or stainless steel construction
  • Open, semi or fully enclosed using bolt-on or quick release covers
  • Single or multiple decks
  • Screen media options include, woven wire mesh, perforated plate, polyurethane, rubber, wedge-wire, bars, fingers or tines
  • Automatic mesh cleaning systems
  • High temperature or ATEX applications
  • Lined with hardened steel, stainless steel, plastic, rubber or other specialist coatings

Linear Vibrating Screens

Driven by two contra-rotating vibrators the linear action produces a positive conveying action capable of vibrating larger and inclined screens suitable for wet and difficult materials.  Typical applications include Grading, Washing and De-watering.

Design options include:

  • Screen sizes up to 5m long x 2m wide
  • Mild or stainless steel construction
  • Open, semi or fully enclosed using bolt-on or quick release covers
  • Single or multiple decks
  • Screen media options include: woven wire, perforated plate, polyurethane, rubber, wedge wire, bars, fingers or tines.
  • Automatic mesh cleaning systems
  • High temperature or ATEX applications
  • Lined with hardened steel, stainless steel, plastic, rubber or other specialist coatings

Probability  Screens / Sizers

These units combine a linear drive action with steeply declined decks fitted with oversized apertures to produce a specialist screening system.  This system is based on the probability of particles passing through a specified aperture within a pre-determined mesh length, thus producing a screen capable of tonnages far greater than conventional screens with the same footprint.

Probability screens are extremely good for Fines Removal and De-dusting applications, they can also be very effective at Grading granular material; however they are not suitable for high quality separations as the use of oversize apertures can pass small quantities of oversize material.

vibrating screen example

These screens operate differently to conventional screens where material is typically conveyed slowly across the screen deck requiring additional screen length to allow the fines to permeate through the material.  The slow permeation of the fines often means conventional screens are unsuitable for removing large quantities of fines.

By comparison, probability screens combine vertical and horizontal material flow to produce a two stage screening process.

Stage 1 – Vertical

Material entering the unit is delivered onto the upper coarse aperture deck then passes rapidly and vertically through the set of meshes which have progressively smaller apertures.  This vertical stage loosens and releases the individual particles so that they pass unhindered through any meshes where the aperture is more than twice the particle size.

When particles reach a mesh aperture of a similar size they are deflected out of the vertical stream, hence the volume of material within the vertical stream reduces as the mesh apertures get smaller.  The number of decks used in probability screens varies depending on the granulometry of the feed material; typically 3, 4 or 5 decks are used to ensure loads on the finer decks are sufficiently relieved.

Stage 2 – Horizontal

Particles which are deflected from the vertical stream are conveyed horizontally along the appropriate screen deck.  The decks within a probability screen are short and steeply declined so the vibrating particles are presented to the apparent mesh aperture as shown in the following diagram.

vibrating screen diagram

The meshes used on each deck are selected so that the apparent aperture provides the required separation size; hence the actual aperture used will be larger and may be up to 60% larger.  These larger apertures greatly increase the passing capacity of the mesh whilst also reducing the occurrence of pegging or blinding; a problem that can often restrict the capacity of conventional screens.


Please view our applications page for details of industries served or for additional information regarding our screening equipment please contact:

Richard Cliffe – Sales Engineer
Email: richardc@vibraplant.co.uk
Mobile: +44 (0)7896 297 324