‘DIAMOND DEW’ needle valves are designed for accurate regulation and positive shut - off in impulse and instrument lines and other small lines systems under pressure up to max 10000 PSIG. Service ratings cover all general applications- steam, gas, water and oil – and include a wide range of acid and alkaline fluids, petrochemical and other organic substances. Materials and design have been adapted with particular regard to extremely erosive conditions encountered throttling service. especially when in combination with corrosive media the valves are drop forged in F316, F304 stainless steel with integral bonnet and needle point disc. Integral bonnet construction eliminates the disadvantages associated with a bonnet-to-body connection on high pressure inside screwed bonnet valves, maintaining accurate alignment of stem and exact mating of disc and seat surfaces. Seat orifice contour and stem pitch provide optimum flow characteristics for accurate manual regulation of high-pressure flow. The valves are available in wide selection of materials AISI 316, AISI 304, special grades steels with design configuration of screwed bonnet, Integral bonnet, solid bar stock construction or drop forged for sizes 1/4” to 2” and end connections to BSP / NPT, Flanged to meet various installation requirements.