Butterfly Valves MAX SEAL General Pricelist MAX SEAL Automated pricelist MaxSeal Butterfly Selection Guide product URL Performance Series Wafer 51 Butterfly Valve product URL Performance Series Lug 52 Butterfly Valve product URL ISO Series Wafer 51I Butterfly Valve product URL ISO Series Lug 52I Butterfly Valve product URL Chem-Flo Series Wafer-25 Butterfly Valve product URL Chem-Flo Series Lug 26 Butterfly Valve product URL Chem-Tek Series Model 53 Butterfly Valve product URL HP Series BL630, BL730 Butterfly Valve product URL HI TEK Series Triple Offset Butterfly Valves product URL HP Series BW630, BW730 Butterfly Valve product URL Chem-Flo Series AWWA Butterfly Valve product URL