GE Speedtronic Mark IV Control-IBH Control Valve Command.

Hello, we have a machine 6B (MS6001B), there is an IBH hot air extraction system, a pneumatic hot air extraction valve VA20 is installed in the project, it should open when de-icing, compressor protection. Is it possible to open this valve completely, on a working machine in the base load? You need to scroll it from 0% to 100%. Someone may have a similar system, please help.





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Hello

First question:

Why you want/need to ge that VA20-1 FULLY OPEN?

Are you respecting app code/MarkIV programm /software by want to do such operations

Inlet bleed heating can be used as Anti icing but you can be facing some combustion troubles


The best advise is to contact teh OEM and get a serious discussion on that operation mode..
 
Hello

First question:

Why you want/need to ge that VA20-1 FULLY OPEN?

Are you respecting app code/MarkIV programm /software by want to do such operations

Inlet bleed heating can be used as Anti icing but you can be facing some combustion troubles


The best advise is to contact teh OEM and get a serious discussion on that operation mode..
Good day

It would be great to try tpo answer to questions when opening new thread ...otherwise we cannot support you by this way ...
 
I'm guessing you need to replace the positioner or set limits on a new one?

We've done that in the past with the unit running, we lost a few MW of generation when VA20 was open but it didn't cause any issues operationally.

Cheers
 
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