The EI300 Series, manufactured by Pvsvalves, is a flanged inspection glass that has been designed to monitor liquids. It is equipped with UPVC,PP,CPVC,PPG,PVDF material, JIS,ANSI,DIN,BS standard and DN15(1/2") up to DN250(10") sizes. This is used in applications involving circular assemblies for welding onto vessels, weld neck, nozzle flanges and visual flow indicators.