NPT Threaded Flow Indicator, Carbon Steel, ANSI 300 psi Service, Flapper Style, Size 1/2

Visual flow indicator with NPT threaded female ports. Thread form complies with the ASME B1.20.1 standard, in carbon steel housing designed for 300 psi service. Designed with front and back windows for backlighting making it easy to see flow variations inside any pipeline, even when used with dark liquids. There is a flapper paddle between the two windows enabling to quickly see if there is any flow going through the pipe. Recommended for monitoring either horizontal or vertical lines with upward flow. The flapper position indicates current flow rate. Flapper style indicators are the appropriate choice for use with clear and semi-opaque solution.This flow indicator is installed in-line of the pipeline between two threaded pipe ends. This model offers pipeline view through toughened borosilicate glass windows internally sealed to the metal housing with Neoprene flat gaskets.Optional window materials include pre-stressed safety glass or quartz.Optional gasket materials include Buna N, Viton, Gylon, silicone, graphite and non-asbestos gaskets.Standard Safety and Maintenance Features include: Independently bolted glass retainers; Acrylic enamel coating surface finish.