756941 – SIGHT GLASS W/INDICATOR DIN, C/IRON FLANGED #621 20MM

IMPA 756941 – SIGHT GLASS W/INDICATOR DIN, C/IRON FLANGED #621 20MM – Of all sight glasses with flow indication, those provided with a flap are the most simple and reliable. They can be built-in both horizontally and vertically, with the inlet under the flap. Application : Can be applied extremely well in totally filled pipes, in particular in cooling water and lubricating oil systems. Besides, the position of the flap gives a certain indication of the velocity (and quality) of the liquid.