ating and is ideal in replacing old cast iron gate valve.Operation : spur gear, electric actuator, pneumatic actuator ( double acting and single acting) Component and it's main materialPart nameMaterial1BodyCast iron / Ductile iron2BallStainless steel / brass / bronze3SeatPTFE4StemStainless steel5Pneumatic or electric actuatorAssemblyDimension for DIN 3357?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?