... 3A,IDF 4)ISO9001:2000 sanitary pneumatic actuators control butterfly valve sanitary pneumatic actuators control butterfly valve1)Material:SS304,304L,316,316L2)Size: ... ,food,pharmacy,berverage,cosmetics,chemical industry,etc6)Working principle:remote-controlled operation by the driving gear or manual operation ... type is pneumatic or manual type sanitary pneumatic actuators control butterfly valve