... all kinds of pneumatic angle seat valve,pneumatic&electrical valve,pneumatic & electrical actuator,solenoid valve,diaphragm valve and so on.the company has ... standards as ISO,DIN,3A,IDF,SMS,JIS,ANSI,ASTM,API and GB.the quality fully meets the specifications and ... by a simple change in the direction of the piston assembly positions available anti-rotation.high quality extruded aluminum alloy cylinder ...