Series STW
A slender body with easy access windows is a popular alternative to traditional slight flow indicators.
Threaded window sight flow indicators are labelled with the company logo as well as pressure and temperature ratings. Available in NPT threaded-end designs, all threaded window sight flow indicator sizes meet ANSI 150 pressure class standards. They are available with all four styles of Penberthy indication.
The threaded window design in an alternative style that is interchangeable with most applications using ANSI 150 pressure class sight flow indicators with bolt-on covers. Instead of unbolting the outer glass covers, these threaded windows are removed for cleaning or replacement with a spanner wrench. Spanner wrenches for removing windows are available. The spanner wrenches have a ½” drive socket to be used with a torque wrench.
