Industry Directory- Check Valveshttp://www.guideindustry.com/check-valves/Site description Check-All Valve Manufacturing Company http://www.checkall.com/Check-All Valve manufactures check valves, stainless check valves, sanitary check valves, connector check valves and flange check valves.Mon, 06 Sep 2010 09:12:26 GMTConval, Inc. http://www.conval.com/Conval has been manufacturing quality products since 1962.Mon, 06 Sep 2010 09:12:26 GMTNEOPERL®, Inc. http://www.neoperl.com/NEOPERL® is the manufacturer of the NEOPERL® check valve cartridge.Mon, 06 Sep 2010 09:12:26 GMTVal-Matic Valve & Manufacturing Corp. http://www.valmatic.com/Val-Matic Valve & Manufacturing manufactures check valve types, which include the SURGEBUSTER®, Tilted Disc®, Dual Disc®, Swing-Flex® and Silent Check® Valves; Plug Valves, Butterfly Valves, nine types of Air Valves and Sure Seal Foot Valves.Mon, 06 Sep 2010 09:12:26 GMTWilliam E. Williams Valve Corporation http://www.williamsvalve.com/Williams Valve Corporation manufactures quality valves including check valves, ball check valves, cast steel swing check valves, and stainless check valves for industrial and commerical applications worldwide.Mon, 06 Sep 2010 09:12:26 GMT