Troubleshooter
Bourdon Manometer
The most common type of gauge is Bourdon manometer. It consists of a dial face calibrated in either „psi”, ,,bar’’ and ,,Pa”. The indicator needle is attach via linkage to a flexible metal tube called Bourdon tube. This tube is fix or plug at the opposite end to the entry port that is install to the hydraulic system. The tube is elliptical or plane curve in shape. Because of the difference in areas between the inside and outside diameters when pressure is apply in the tube, this one tries to straighten out. This action causes the pointer to move and indicates the appropriate pressure on the dial scale. For function animation and better understanding of the pressure gauge let me know.
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The Bourdon tube manometer is general precision instruments with accuracies ranging from 0.1 to 3% of full scale reading.
Hydraulic systems should have connected pressure gauge as they inform users of what pressure is the system. The smaller the measurable differences, the more expensive the meter will be. To prevent the indicator from vibrating or knocking the gauges are fill with a glycerine liquid in them.
Where and how should a gauge fitted
Bourdon manometer should fitted at places where continuous monitoring or very frequent checking is necessary. Gauges that do not have to be read continuously are connected using a 3/2 valve. This prevents the meter indicator from vibrating and swinging in the rhythm of the pump. Also other method of solving this problem is uses of throttles, capillary lines, but these have the drawback of getting easily blocked.
Another aspect to guarantee a longer life of the pressure gauges is the measuring range does not exceed 70% of working pressure of the hydraulic system. E.g. with a pressure gauge of 400 bar is recommend to measure a maximum 280 bar.
