... working pressure: 2000~15000psi nominal size: 2 1/16~4 1/16 PSL1~4, AA~FF,PR1, P.U connect: flange,clamp wellhead ... to all kinds of casing, tubing programs and connection forms 4.Can be equipped with (pneumatic) hydraulic safety valve 5.Working ... :-46°C C-121 °C (Class LU) 8.Material class: AA,BB,CC,DD,EE,FF wellhead equipment