1.certificate:ISO9000;CCS,ASME,CE 2.material:carbon steel,alloy steel 3.the company has a history over 35 years AJF high pressure safety ball valves, designed on the basis of AQF safety ball valve,have the functions of safety protection,flow cut off and load relief for the accumulator in a hydraulic system.this component for hydraulic system is widely used in chemical,metallurgical and mechanical ...