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  Lift Check Valve-H61Y-800LB-1 "-LF2-2
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  Welded Flange Swing Check Valve-H44H-300LB-1.5
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  Type Y Check Valve YH11Y-800LB-25
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  The check valve H61Y - 800 lb - 40
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  Middle welded Y-Check Valve YHH61Y-800LB-20
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  Central welded check valve HH11Y-800LB-20