We are using a PSA oxygen generator unit for our glass ampoule manufacturig unit. The oxygen plant runs in auto mode and manul mode. When we run in maual we get pure oxygen but when it is run in auto (recomended) mode it loses purity after some time. We asked the manufacturer, he is of the view that purity will be disturbed when we try to get more then the designed parameters like flow and pressure while we think we are not. The plant is designed to give 4baroxygen pressure. Capacity of the plant is more than our needs because in auto mode the plant do stop when oxygen tank is filled upto a limit pressure. It work exactly it should work but loses purity. Also if molecular sieve is faulty then it should not ever gain purity once it loses, thats what we also told. Now we request you to assist us in removing our following problem;
1. We have to set the oxygen manometer pressure at 4bar to get the desired pressure of flame at the machine. While for every other ampoule manufacturer the pressure setting need is about 2-3bar as oxygen needed for flame is of only 0.5 to 1.0bar. Why we have to set at high level pressure, where we could be wrong?
2. The oxygen piping used in the production hall is 1" dia while that which comes to machines is 1/4" (quarter dia). We have used 1/4" (quarter inch dia) pipe of about 15ft length from oxygen tank (that is designed for 1/2" dia) to the main 1" dia pipe in the production hall. Does it make any difference for drop of pressure so that we have to maintain high pressure at oxygen out put regulator? Our supplier is asking to change this pipe to make it all for 1"dia or 1/2" dia and then at machines it should be reduced to 1/4" (quarter inch) dia? By this he thinks the oxygen out pressure will not drop and plant will not lose purity as it will work within design limits. Is he right?
3. Every valve of the plant is working, dew point is maintained at 3deg (recommended).
We shall be grateful for your kind help and guidance in this regard.
Best regards.
Oxygen Purity Problem in PSA Oxygen Generator
Re: Oxygen Purity Problem in PSA Oxygen Generator
