The Syphon Tube is connected between the pressure gauge & process in applications where high temperature vapours or fluids are present or temperature above 65 Deg C for eg. steam.
It acts as a cooling coil and protects the gauge from high temperature vapours, by dissipating heat. A gauge cock is generally connected between the pressure gauge and syphon for isolation.
These are normally made from Sch. 80, Sch. 160 and Sch. XXS seamless pipes.
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