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Testing Of Steam Turbine Trip & Throttle Valve

Started by akslzf, Nov 15 2009 08:52 AM

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#1 akslzf

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Posted 15 November 2009 - 08:52 AM

Other than API 598 recommended tests for valves (shell radiography & hydro, back seat, low pressure closure, high pressure closure and hold times), I'm wondering whether there are any standards (like API...) that recommend what all acceptance tests are required for hydraulic TTVs of special purpose steam turbines.
Does anyone with reasonable experience on hydraulic TTVs comment on this?

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