Old May 23, 2007 | 08:01 PM
  #24  
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GARETH T
Professional Waffler
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Joined: May 2003
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From: barry-south wales
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how did you work out the energy needed to lift your valve?

did you do it force=pressure x area, where pressure would be the differatial pressure across the valve area,,, and of cause area being the valve area?
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