Wedge Wire Technology and Profiles

Wedge wire screen is a welded vee wire stainless steel construction mainly used for filtration, separation and retention of media. It is made of surface profiles, usually V-shaped (wedge shaped) , that are resistance welded onto support profiles.

The distance between the surface profiles is controlled very accurately and forms the slot opening  through which the filtrate flows.

FOTI – FITO

The direction of the filtering flow is determined by the position of the surface profiles in relation to the support profiles. Wedge wire tubes are either flow out to in (FOTI) or flow in to out (FITO).

 Wedge wire advantages

  • Non-clogging: the continuous slot formed by the V-shaped surface wires ensures a two-point contact between the particles and the slot, which minimizes clogging
  • High-precision slot sizes
  • Surface filtration: the V-shaped wires allow easy cleaning by mechanical scraping or back flushing
  • Longer life time
  • Low pressure drop
  • Strong construction: for most applications, the wedge wire screens are self-supporting
  • Engineered to high standards

Product overview

Almost all shapes and sizes can be developed according to the customer’s requirements, starting from two basic forms:

  • Slot tubes – radial external wire
  • Flat screens

Overview:

slot tube
Radial external wire – FOTI
slot tube
Radial external wire – FITO
slot tube
Radial internal wire – FITO
wedge wire cylinder
Axial internal wire – FITO
wedge wire continuous cylinder
Axial internal wire – continuous support – FITO
wedge wire sceen
Flat screen
Curved screen
wedge wire cone
Conical basket

Some of the materials of Construction

AISI DIN UNS Trade name
3.7035 Titanium GR II
430 1.4016 S43000
304 1.4301 S30400
321 1.4541 S32100
316L 1.4404 S31603
316Ti 1.4571
317LN 1.4439
1.4539 N08904 Uranus B6
2.4360 N04400 Monel 400
2.4819 N10276 Hastelloy C276
1.4462 S31803 Uranus 45N Duplex
Super duplex
1.4547 254 SMO
Impact + (wear resistant material)