The valve body of 3000psi internal thread ball valve is cast by silica gel process, with reasonable structure and beautiful shape. 3000psi internal thread ball valve seat adopts elastic sealing structure, with reliable sealing and easy opening and closing. The valve rod adopts a bottom mounted structure with inverted seal. When the valve chamber is abnormally pressurized, the valve rod will not be rushed out. Applicable to PN10 ~ 12.5mpa, working temperature -29~18℃(the sealing ring is reinforced polytetrafluoroethylene) or - 29 ~ 300 ℃ (the sealing ring is aligned polystyrene), 3000psi internal thread ball valve is used to cut off or connect the medium in the pipeline. Different materials are selected, which can be applied to water, steam, oil, nitric acid, acetic acid and other media respectively.