... 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 ... in chemical,metallurgical and mechanical industries,wining high acculaim among users. the valve has a long service life,and the ... .5AJF-HX50L-XH140552948581106616011360262217106105232M72×2M60×2M22×1.5 AJF high pressure safety ball valve,special designed