Orifice plates measure the flow rate, reduce pressure or restrict flow. Model OB (brass), OS (SST) and OM (Monel) orifice plates for liquids, gases, corrosive and high temperature applications. Our flow nozzle consisting of a convergent, curved profile having no discontinuities leading to a cylindrical section (throat) which provides an excellent flow profile, low friction especially with abrasive fluids that would typically erode traditional sharp edge orifice plates. Contact the factory for custom sizes, flow rates and gas type.