DOUGLAS ITALIA manufactures a large range of sight flow indicators enabling the user to inspect visually the liquid or gas flowing in the pipeline. They are available in various pressure ranges, materials and components.
Sight flow indicators may be supplied equipped with many types of internal flow indicators suitable for different industrial processes. Our model with flappers are particularly suitable for checking the efficiency of steam traps, clearly indicating any loss of live steam.For this use, the sight flow indicators should be installed upstream the steam trap and therefore must be able to withstand the full line pressure.