990.52 & 990.53 Sterile Connection Diaphragm Seal

The WIKA 990.52 and 990.53 diaphragm seals with clamp connection have been specifically developed for use in sterile processes and are integrated into the process using a clamp. Thus an excellent cleanability is ensured.

The diaphragm seal systems can withstand the cleaning vapour temperatures occurring in the SIP processes and thus ensure a sterile connection between the medium to be measured and the diaphragm seal.

Assembly of the diaphragm seal and measuring instrument is made via a direct assembly as standard or optionally via a cooling element or a flexible capillary.

For the material selection, WIKA offers a variety of solutions, in which the upper part and the diaphragm are made of identical materials. Stainless steel 316L (1.4435) is used as a standard material. Other special materials are available on request.

Measuring systems with the WIKA 990.52 and 990.53 diaphragm seals are successfully used worldwide in the food, bio and pharmaceutical industries as well as in paint finishing systems.


  • For cleaning easy to open
  • Quick cleaning of measuring point, without residue
  • Suitable for SIP and CIP
  • EHEDG certified and 3-A compliant
  • Compliant per ASME BPE

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Edward van Doorn