... pressure and adjust flow rate, also include oil into outlet pipeline, shut off oil well when necessary, and apply to acid fracturing ... pneumatic) hydraulic safety valve. • Working pressure: 2000PSI~20000PSI • Working medium: oil, natural gas, mud ,including H2S,CO2 • Working temperature: -46°C ... PU LU,PU LU,PU Available Medium Oil,Gas Oil,Gas Oil,Gas Oil,Gas Oil,Gas Oil,Gas Oil,Gas PSL 1~3 1~3 ...