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CHAPTER NO 5 readjustments & maintenance5.1Capillary electron tube5.2 land5.3Pressure Gauge Fitting5.4 balance Valve5.5Pressure Adjustment5.6PD Pump System Flow Diagram5.7External Relief Valve Adjustment5.8Internal Relief Valve Adjustment5.9Motor Lubrication5.1 Capillary render-A capillary tube is a narrow, long tube of invariant diameter. In refrigeration application of capillary tube, the surface tension is not important. Tube length limit from 1.0 m to 6 m and the diameters of refrigerating capillary tubes limit from 0.5 mm to 3 mm.Due to the following cardinal factors the pressure reduction in a capillary tube occurs The frictional resistance offered by tube walls refrigerant has to overcome. Than that of the liquid the density of vaporisation is less. As it flows in the tube the average density of refrigerant decreases. The improver in acceleration or velocity of the refrigerant requires pressure drop.5.2 Priming-Liquid hearts can lose prime and to get the pump starte d this willing require the pump to be primed by adding liquid to the pump and inlet pipes. Loss of prime ...