2009- 9- 8
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Guest
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Wafer-style valve
The wafer style butterfly rubber lined valve http://www.corrosion-resistant-valve...e-fitting.html is designed to maintain a seal against bi-directional pressure differential to prevent backflow in systems designed for unidirectional flow. It accomplishes this by using a tightly fitting seal, i.e., gasket, o-ring, precision machined, and a flat valve face on the upstream and downstream sides of the valve.
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