Pressure gauge syphons

What is a pressure gauge syphon?

A pressure gauge syphon is a device used to protect pressure gauges against the effect of high-temperature environments as well as reducing the effect of pressure surges that could potentially damage the function of a pressure gauge.


How it works:


Temperature protection


  • Due to the temperature difference between the process line and pressure gauge syphon, hot media, such as steam, is cooled rapidly causing condensation to form and collect within the syphon.
  • This condensation acts as a buffer between the hot media and pressure gauge,preventing the hot vapour coming into direct contact with the gauge.
  • High temperatures within a gauge have the potential to cause damage to the gauge or create inaccurate readings.


Pressure surge protection


  • When the syphon is first installed, it should be filled with a suitable material to separate the process line and the pressure gauge.
  • This material will then act as a dampener in the event of a pressure surge by reducing pressure fluctuations entering the gauge and improving the stability of the gauge reading.


Different types & applications


  • Ring Syphon – normally used for vertical installations.
  • U Syphon – a ‘U’ syphon is normally used for horizontal installations.


Brannan offer a range of syphons, including mild steel, brass & stainless steel, in a variety of connection sizes. Contact for further details.


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