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grahulgrahul670
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Join Date: Jul 2012
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How Does Vacuum Breaker Valve Protect LPT Diaphragm During Sudden Tripping

07/30/2012 12:20 PM

During sudden turbine trip vacuum breaker valve is actuated to protect LPT diaphragm. How does this action protect LPT diaphragm.
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Pathfinder Tags: Condenser power plant turbine Vacuum
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PWSlack
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#1

Re: How Does Vacuum Breaker Valve Protect LPT Diaphragm During Sudden Tripping

07/31/2012 3:22 AM

By reducing the vacuum, so that the differential pressure across the diaphragm does not exceed the maximum allowable?

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grahulgrahul670
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#2
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Re: How Does Vacuum Breaker Valve Protect LPT Diaphragm During Sudden Tripping

07/31/2012 10:48 PM

But this differential pressure will exist even when turbine is running normal since condenser is still under vacuum. So why doesnt this diaphragm fail during normal running?

Thanks in advance
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PWSlack
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#3
In reply to #2

Re: How Does Vacuum Breaker Valve Protect LPT Diaphragm During Sudden Tripping

08/01/2012 3:28 AM

Somewhere in the original equipment manufacturer's user manual there will be a detailed process description. What does it say?

And if it doesn't say, what does their technical helpline have to say about it?

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