30" 500psi Annular blowout preventer (1)API Spec 16A (2)API ... kelly, drill pipes, tool joints, drill collar,etc.Technical ParameterBore 30"Working pressure 500psiVolume for Closing 245LVolume for Opening ----------control pressure ... 1200-1500psiManufacture specification API SPEC 16ADimenison 2070x2070x1749Weight 10978kgTop connection MSS 30"class300 R95 CRA StuddedBottom connection MSS ...