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Better screening – tips and recommendations

To improve your processes

Service life

A key issue for economical sieving and sizing. Correct tensioning and optimum positioning of the screen are important considerations for optimum performance. Experience shows that a screen should last (in mechanical terms) for 500 to 600 operating hours. If this is not the case, it is well worth investigating the reasons why not. Reasons for a reduced service life for steel meshes can include tensioning, installation, the machine itself or the screenings.

tensioning screens

Minimum screen tensions given in the data sheets are approximate values. Screens tensioned in accordance with these values will achieve good service life on most machines. In order to maximise the potential of the machine, an individual assessment of the tensioning values may be necessary according to the separation data. Correctly and evenly tensioned screens can achieve exceptional service lives. The finer the mesh, the more sensitive the tensioning process.

In practice, the following guidelines have proved valuable:

  1. Bring the mesh up to the recommended tension in stages. Increase tension alternately in warp and weft directions, always beginning with the warp.
  2. When tensioning fine meshes, check the tension constantly during the process using a tension meter.


Screen blockages

Blinding particles: Some particles are fractionally too large to pass through the screen, and become stuck. Increasing the mesh count by 5% can bring about a significant improvement.
Build up of particles: Partial or complete blinding of the apertures by fine particles, often in combination with moisture. As a corrective measure, install a mesh with a greater surface area as well as sieving aids such as beads or brushes. When installing sieving aids, ensure that the additional mechanical loading is minimised as far as possible.

Please select a contact person and send us your inquiry

Technical Sales Manager
Tel.: +1 704 628 0395

Technical Sales Manager
Tel.: 434 219 9800

Tel.: +1 845 296 1065


Important notice to our current and future customers:

G. Bopp + Co. AG (“Bopp”) and even their existing customers have recently noticed that online offerings of products which look similar to those of Bopp and declaring them as “Bopp” products are increasingly being introduced on online purchasing platforms. There is no doubt that these offerings infringe Bopp’s trademarks, violate unfair competition (and other) laws and seriously deceive the market participants.

Bopp have reacted and undertaken respective measures to defend and protect their rights. Considering the enormous number of violators, it seems inevitable that this process will take longer than Bopp desire.

In the meantime, Bopp would like to emphasize the following:
Products manufactured by G. Bopp + Co. AG in Zurich, Switzerland are exclusively available from its subsidiaries in Switzerland, Germany, England, Italy, Sweden, USA, Korea and China and the nominated representations.

G. Bopp + Co. AG are one of the world’s leading producers of precision woven wire meshes providing their high-quality products to market leaders in the high tech, pharmaceutical, chemical, aeronautics, plastic, glass, ceramics, mechanical engineering, paper, environmental technology and even space travel (www.bopp.com).