Class 200 AISI 316 Valve. RS Screwed End Globe Valves used for regulating flow in a pipeline and available in a variety of sizes. Features:. 1/4"-2" (DN8-DN50) W.P: 200WOG W.T: -20°C-200°C (-4°F-392°F) Investment casting Thread type: ASME B1.20.1 (NPT), DIN 2999 ; BS21, ISO7/1 ; EN10226. Materials:. Body, Bonnet and Disc - ASTM A351-CF8M Seal and Packing - PTFE Washer, Gland Ring and Stem Nut - AISI 304 Cap Nut and Stem - AISI 316 Handle and Nameplate - Aluminium