Make 50 ml samples in two nesseler cylinders 1st 15ml 0.5N HCl+ 25ml sample+ 10 ml of dimethylaminobenzaldehyde 2. 35ml boiler water and acid and compare colourimetrically. Value must be between .1to 1ppm
Since very small needle lift is obtained in the test equipment result in an unequal pressure distribution in the cut off shaft resulting in a hard contact in a small area along with high frequency oscillations, low lubricity of test oil will increase the chance of seizure. Full lift and high lubricity of heavy oil eliminates this risk of seizure during normal operation.( Always open and clean slide type valves before testing as cold sticky heavy oil along with small clearances can cause restriction in the movement of the spindle).
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