... pressure safety ball valves, designed on the basis of AQF safety ball valve,have the functions of safety protection, ... mechanical industries,wining high acculaim among users. the valve has a long service life,and the material ... precision,large flow capcity and fast response,the valve may improve the working efficiency of the system. ... ×2M60×2M22×1.5 AJF high pressure safety ball valve,special designed