Applications
·
For aggressive, hot, corrosive, environmentally
hazardous or toxic media
·
Process industry
Special Features
·
Process connection with thread to provide for
direct threaded connection
·
Version with internal diaphragm, diaphragm seal
parts screwed together
·
Large selection of process connections and
materials
Description
Diaphragm seals are used to protect the pressure measuring
instrument from aggressive, adhesive, crystallising, corrosive, environmentally
hazardous or toxic media.
A diaphragm made of the appropriate material provides for
the separation from the medium to be measured. Thus even the most difficult
measuring requirements can be met by combining measuring instruments with
diaphragm seals.
A fluid inside the system, which can be chosen to suit the
particular application, hydraulically transmits the pressure to the measuring
instrument.
Almost limitless application possibilities exist due to the
large number of available variants, such as diaphragm seal designs or
materials. The type of process connection (flange, threaded and sterile
connection) and the basic method of manufacture are important design differentiation
criteria.
For further technical information on diaphragm seals and
diaphragm seal systems see IN 00.06 "Application, operating principle,
designs".
Due to its design, the model 990.10 diaphragm seal with
threaded connection can be used universally. A replacement of the lower body is
possible (e.g. when changing the process connection) without having to carry
out modifications on the diaphragm seal system.
Compared to the model 990.40 diaphragm seal, higher pressure
ranges can be covered (smaller diameter of the diaphragm).
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 body, the diaphragm and the lower body can be
made of identical or different materials. The diaphragm and the lower body can
also be offered coated or covered with foils.
The model 990.10 WIKA diaphragm seal is particularly well
suited for aggressive or hot media. This instrument is mainly geared to
applications in the process industry.