... which is a pneumatic & electical valve manufacturer,specialized in producing all kinds of pneumatic angle seat valve,pneumatic&electrical valve,pneumatic ... standards as ISO,DIN,3A,IDF,SMS,JIS,ANSI,ASTM,API and GB.the quality fully meets the specifications and requirements ... Material:aluminum alloy4)Pictures Pneumatic actuator, Valve actuator,AT Series actuator,Double acting and single acting