LAWAI is the centrifugal casting manufacturer in Taiwan specialized in producing stainless steel & special alloys tubes, sleeves and rings.  Retainer rings are one of the centrifugal casting products we produce often.  Our retainer rings are for high-performance valves and butterfly valves for marine applications mainly.  Most our customers purchased our blank retainer rings(rough machined) and did the finish machining by themselves. If you would like to purchase the finish machined retainer rings, we will cooperate the outsourcing machining shops for your projects.