Triple eccentric worm gear flange butterfly valve 

butterfly Valve Applicable Standards:
 Design & Manufacture according to : BS 1868
 Face to Face according to : ASME B16.10
 Flange Dimensions according to : ASME B16.5
 Pressure & Temperature according to : ASME B16.34
 Test & Inspection according to : API 6D / API 598
 Visual Inspection according to : MSS SP-55
 Marking according to : MSS SP-25