The Penberthy Series STW Sight flow Indicator is designed to operate well in a range of liquid applications. The STW has a slender body with easy access windows and is a popular alternative to the traditional sight flow indicators. The STW series sight flow has threaded NPTF connections and is ANSI 150 pound rated. The STW threaded window sight flow is labeled with company logo as well as pressure and temperrature ratings. A spanner wrench is required for removing the windows (see below).
Neoprene® is the standard gasket material for Iron, Bronze and Carbon Steel bodies. The maximum temperature rating for Neoprene® is 300ºF.
This Penberthy sight Flow is 1 inch NPT and made of CAST IRON.
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