Innovation and quality are core aspects of our operations at Vokes Air and genuinely help to add value to your organisation. Our fully-equipped laboratories based in Uster, Switzerland and Svenljunga, Sweden, ensure that our products are guaranteed to be at the forefront of filter technology. Both facilities allow us to constantly re-evaluate our portfolio and design innovative new products which perform at the highest levels.

Filter Research and Development
In addition to new product development, the R&D laboratories have extensive quality testing facilities to ensure that our products perform to the high levels you would expect from a Vokes Air filter. Each state-of-the-art piece of equipment helps to accurately simulate a variety of real-life operating conditions to ensure that our products perform to the highest standard, even in the most extreme of environments. An integral part of our quality assurance process is to test to EN 779 and EN 1822 quality standards and ensure that our filters conform to the industry standard guidelines.

We have the following testing capabilities in addition to those outlined above:

Filter Media Testing according to EN 779 and EN 1822-3

Automatic Filter Testing:

  • Penetrating particle size (0.01 to 0.4 µm)
  • Fire resistance (according to DIN 53438)
  • Tensile strength test
  • Water repellency test
  • Thickness test
  • Weight test
  • Stiffness test

Filter Testing according to EN 779 and EN 1822-4


  • Air flow rate
  • Pressure drop
  • Efficiency @ 0.4 micron and at MPPS
  • Dust holding capacity
  • ULPACATS Scan test according to EN 1822
  • Lasking aerosol generator
  • Particle counters

Water Spray and Burst Pressure Test Rig

  • Filter under wet conditions
  • Water exposure (up to 30 litre/h)
  • DDC controlled online measuring system
  • Filter burst test under humid and dry conditions
  • Air flow rates (up to 6000 m³/h)
  • Burst pressure up to 6000 Pa
  • Dimensions 610 x 610 mm
  • Incorporated GT evaporator module
  • Relative humidity up to 100% r.H.

Other Test Instruments

  • Pressure, anemometer, temperature and humidity gauges
  • Particle concentration measurement (0 – 100 mg/m³)
  • Sodium flame test rig
  • Diesel fume test rig
  • Oil mist test rig
  • Droplet separator test rig

In addition, we offer test services designed to help you improve the output of your process. This consultancy approach is widely used in the power generation industry where we regularly perform audits to help increase the output of customers’ rotating machinery.

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Did you know?

A bag filter with 635 mm long pockets will cost €3.50 more than one with 525 mm pockets but cost €25 less in energy per annum.