Previous Next

Sight flow indicators

Sight flow indicators are engineered to provide visual observation of liquid and non-hazardous gas flows. These pipeline indicators are available with ductile iron bodies in sizes 3/8" to 4" with threaded or flanged connections. All glass windows are made of borosilicate glass. Sight flow indicators can be furnished with special transparent-type Mica liners to protect the glass against erosion.


  • Ductile iron construction
  • Heavy duty Pyrex® glass or equal 
  • Special transparent-type Mica liners available 


  • Minimal pressure drop 
  • Minimal flow resistance 
  • High visibility of flow 
  • Operating pressures up to 150 psig