Pressure reducing valve
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The booster of the air separation unit is of the integral gear external volute type. The shaft seal gas uses a pressure reducing valve. The pressure is adjusted after the pressure reducing valve to 50KPa. In actual operation, the pressure gauge after the pressure reducing valve shows 550KPa. This is caused by the process gas being introduced from the shaft seal into the sealing tube and it is hot. Is this pressure normal? Will it damage the diaphragm pressure reducing valve?
What is your air source pressure? Is it 550KPa? If it means that the pressure reducing valve is not working at all, it is probably because the pressure reducing valve is not adjusted properly, or the pressure reducing valve is broken!
That pressure is obviously abnormal. This post was last edited by niulijun117 on 2009-3-4 13:17 ]
Either the meter is broken or the valve is broken. What else is there to say, just change it!
Could it be the pressure from the process gas?
1) Is the compressed air clean? Is there any blockage? 2) Check the mechanical shaft seal.