STANDARDS > DESIGN STANDARDS
AWWA STANDARDS - RUBBER-SEATED BUTTERFFLY VALVES
BRITISH STANDARDS - SPECIFICATION FOR BUTTERFLY VALVES
BRITISH STANDARDS - INDUSTRIAL VALVES METALIC BUTTERFLY VALVES
API STANDARDS 609 - BUTTERFLY VALVES DOUBLE FLANGED, LUG- AND WAFER-TYPE
AMERICAN NATIONAL STANDARDS - FACE TO FACE AND END TO END DIMENSIONS OF VALVES

BRITISH STANDARDS -  FACE TO FACE AND CENTER TO FACE DIMENSIONS OF METAL VALVES FOR USE IN FLANGED PIPE SYSTEM

INTERNATIONAL STANDARDS - METAL VALVES FOR USED IN FLANGED PIPE SYSTEMS - FACT TO FACE & CENTER TO FACE DIMENSIONS