circular sight glass fittings

Screwed Sight Glass DIN 11851 /EN 10357 for welding into or onto vessel wall complete with glass disc, gaskets and slotted cover nut Use: Screwed Sight Glasses are used for observation of processes inside Boilers, Vessels and Pipes. They are often employed in food service, dairy, breweries and pharmaceutical applications. Due to the high temperature tolerance sterilization is possible.