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Drum Level Transmitter

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Posted by Naresh kumar on August 25, 2009 at 13:26:21:

In Reply to: Re: Drum Level Transmitter lines posted by Steve on July 29, 2006 at 14:17:52:

We have three differential pressure transmitter installed at 170TPH, 87bar Bagasse fired boiler.
Boiler Drum Level transmitter which is installed at Right side of the boiler steam drum is giving high deviation upto 30% in level than other two transmitters installed at Left side of the boiler. We installed a new transmitter on the same side at different tappings for observation but it is showing same. We have checked calibration, Transmitter, and also the impulse tubing but the problem is still there.

The main problem is this that this deviation is not permanent it varies from +5% to -30% than other two transmitters. Sometimes it becomes normal and sometimes a high deviation.

We have also compared with hydrastep the level is actually coming down in one side only. Due to this drum level control has become difficult. After all our effort we are unable to solve this.
Please suggest.

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