actuator valve,flange valve,toyo gate valve,bolted bonnet,flanged ends. good quality,ISO certified. actuator valve,flange valve,toyo gate valveDesign & manufacture standard: API6D, ... API600, API603, ANSI/ASME B16.34, ISO10434.Face to face dimensions: ANSI/ASME B16.10.Flange ... pressure seal bonnet is available. gear gate valve