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Thread: Diff between Outflow valves and Positive/Negative Pressure valves?
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Old 6th Apr 2018, 13:22
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Basil
 
Join Date: Jun 2001
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When you think about it, having no separate positive pressure relief valve is a bit like operating a boiler without safety valves and depending upon furnace fuel control to ensure that the pressure will never rise above the design limit
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