WIKA diaphragm and in-line seals are now certified to the EHEDG (European Hygienic Engineering & Design Group) standard. Moreover, the diaphragm seals conform to the 3A guidelines. Products are therefore available that guarantee compliance with stringent hygienic guidelines, both in Europe and the USA, for the food and pharmaceutical industries and also manufacturers with similarly high demands.
The diaphragm seals, certified by the TU Munich/Weihenstephan, ensure safe application with sterile connections such as Varivent, Neumo BioConnect, Neumo Connect S or connections to DIN 11864. WIKA uses stainless steel 1.4435 as a standard for all surfaces in contact with critical process media. For the EHEDG certification, all wetted surfaces meet the following specification: average surface roughness, Ra ≤0.5um (Ra ≤0.8um close to welds).
Operators benefit from the products' compliance with the standard because their plants can be cleaned particularly effectively using CIP/SIP processes. In addition, components from this material exhibit good welding and corrosion-resistance characteristics – and, if needed, they can be electro-polished.