Special Features:

Item name per vendor: plug sight glass; 12 un-3a str thd; lens material of soda lime or borosilicate (tempered); internal seals of neoprene-1; max operating condition: 265 psig@125 degrees f; proof press 800 psig@250 degrees f

Properties:

An item so designed to have a portion or all of its body transparent to permit the visual examination of the amount of liquid in a pressure vessel, boiler, evaporator, still, processing tank, reservoir, pipe tubing line, and the like, and/or to determine the flow to a lubricated part. It may also be provided with an element that changes colors to indicate changes in moisture content. The item may have a means for refilling. Excludes indicator, liquid quantity and indicator, rate of flow.