This valve is suitable for hydraulic system and chemical system of all kinds of pipe for opening and closing. SAE J518C-3000PSI and 6000PSI butt flanges are installed in the middle of the pipeline. This kind of ball valve should be connected with SAE standard flange, which can be accompanied by two kinds of flange ball valve working pressure :21.0MPa and 31.5MPa. Quick and convenient maintenance by installation. Is the company's scientific research personnel according to foreign data combined with domestic standards designed into a new generation of products. Can replace imported products in the hydraulic integrated system widely used.