... :milling,lathing,routing,refining stainless steel valve part ,1)ISO9001:2008 certification.2)Over 16 years experience We are ... and all kinds of special-shaped pieces and processing according to your drawings. 1.have 10 years experience in stainless steel valve part . 2 ... ,punching, folding and bending, CNC machining,drilling,powder coating,pressing part,polish,etc. wedge disc for Knife gate valve part