In addition to both threaded pipe and flanged connections, sterile, standard-compliant connections for instruments are now also available able in the form of a clamp connection.
WIKA uses 316L stainless steel as a standard material for wetted parts. In addition, special materials such as 904L stainless steel or Hastelloy are also available. The 981.51 diaphragm seal is particularly suited to applications in the pharmaceutical and food industries as well as for paint and chemical lines.
This patented WIKA diaphragm in-line seal is notable due to its cylindrical construction, enabling it to be mounted directly into the pipeline and thus making it self-draining. With the sterile connections, and in conjunction with the measuring instrument, a dead-space free and crevice free measurement is possible.
Both this concept, and the materials used have been certified by the EHEDG (European Hygienic Equipment Design Group). In the USA they conform to the 3A guidelines.