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The fitting of a diaphragm seal unit to a pressure gauge is recommended where the medium to be measured is highly viscous or contains suspended solids or is potentially corrosive to the Bourdon tube. Seal units are normally connected directly to the gauge, but connection may be made by flexible capillary, which makes them ideal for remote pressure indication. Pressure is transmitted from the diaphragm seal unit to the bourdon tube by a suitable filling medium, the selection of which will ensure compatibility with the process and process temperature.

We can manufacturer diaphragm gauges in any size and any configuration to suit your application. We are not limited by standard thread sizes and we can offer options such as flange connection, PTFE lined, electrical contacts etc to all our diaphragm gauges.

Please contact us with your requirements.

Specifically designed to be crevice free with flush diaphragms for all hygienic applications. They contain no filling fluid which would contaminate the process should a failure of the unit occur. Complying with the most stringent of hygiene regulations, and is available with a full range of connections and operating pressures.

Please contact us with your requirements.

Designed for measuring the pressure or vacuum of substances which should not be handled by bourdon tube instruments. They are ideal for some corrosive products or liquids containing suspended solids.

Implementing specialist materials for both the connection and diaphragm enable the Shaffer Diaphragm gauge to be configured for use on any gaseous or liquid media including suspended solids or powders. The direct drive from the diaphragm to the movement ensures a more positive indication of pressure than other models of tube gauges.

Offering a full range of flanged connection sizes and materials, Schaffer Diaphragm gauges can operate at pressure ranges as low as 30 mBar with the option to permit units to withstand a maximum pressure of 70 bar.