... Machining process:milling,lathing,routing,refining stainless steel valve part ,1)ISO9001:2008 certification.2)Over 16 ... drawings. 1.have 10 years experience in stainless steel valve part . 2. ISO9001:2008 certification. 3.Materials: ... lathing,routing,refining ,etc Item Name stainless steel valve part Product description1)Material:304/316 stainless steel ... ,polish,etc. wedge disc for Knife gate valve part