Boiler Mounting - Steam Pressure Gauge

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STEAM PRESSURE GAUGE

Function: 
The function of the pressure gauge is to measure the pressure exerted inside the vessel.

Working: 
The pressure gauge is connected with the boiler’s steam space through a U-tube siphon. The U-shaped pipe contains water, which fills the Bourdon tube. The pressure of the steam acting through the water on the inside of the tube tries to make the tube circular. One end is fixed, the free end moves. Because of pinion & gear arrangement, the slight movement of the Bourdon tube is magnified considerably and the point gives a maximum deflection, which can be read on the scale.
Fig. - Steam Pressure Gauge

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