The Penberthy Series STWF Sight flow Indicator is designed to operate well in a range of liquid applications. The hinged FLAPPER indicates variation in flow by its positon. Transparent or slightly opaque fulids can be monitored. Horizontal and vertically upward flow can be observed. The STWF has a slender body with easy access windows and is a popular alternative to the traditional sight flow indicators. The STWF series sight flow has threaded NPTF connections and is ANSI 150 pound rated. The STWF 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 2 inch NPT and made of CAST IRON.
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