Butterfly Valve Features & Specialities Size Range - 1/2" to 40" Pressure Rating - 150#, 300#, 600#, 800#, 900# Certifications - IBR, CE, Atex, etc. Centreline, Double Eccentric and Triple Eccentric types available Inspected & Witnessed By third party agencies - API Valves, ATex Valves, CE Valves, Process Valves, Gas Valves, Water Valves, Cryogenic Service, Fire Safe