ViscoTec preeflow recently announced that it has developed a stainless-steel kit for eco-PEN 300, 330, and 450 dispensers. These alternative housing components are suited to convert a standard eco-PEN dispenser. The stainless-steel components replace the standard POM (polyoxymethylene) housing components. All wetted parts of the new kits are made of high-quality stainless steel 1.4404 (AISI 316L).

According to the company, various requirements in specific applications have made it necessary to expand the portfolio:

  • Some applications require that all parts of the dispensing equipment in contact with the product are made of stainless steel, VisChem, and FFKM.
  • In other applications, certain components of the dispensing materials (e.g., solvents or plasticizers) have a negative effect on the material POM (degradation in relation to temperature, time, and material concentration). After extensive testing, these materials can now be dispensed without any issues.
  • Depending on the material used, it may also be necessary for the housing components, in contact with the product, to be resistant to fluxes for soldering, oxidants (peroxides or ozone), or organic and inorganic acids below ph4.
  • In some applications, a robust design is necessary due to many cleaning intervals.

In terms of dimensions, the stainless-steel version is identical to the standard plastic version. The additional weight compared to the POM version is 100 g for eco-PEN 300 and 185 g for eco-PEN 330 and 450.

Additional details are available at