OKVAL offers the complete and technically advanced valve product lines for the world-wide oil & gas industry, include API 600 Conventional Casting Gate/Globe/Check Valves, API 602 Forged Valves, API 6D Ball Valves & Full opening Swing check Valves for oil refining plant, gas processing plant and integrated processing plant,storage & long distance transportation. Heavy wall design for corrosion resistance and low fugitive emission is available on request.