Flutter: Low Volume Horizontal & Vertical Upward Flow

Flutter models are recommended for applications involving low flowing gases or liquids that fall under the minumum indication flow rate for the Flapper and Rotor styles. A thin TFE (Teflon) flutter engages the media and indicates flow, fluttering against the viewing window.

Threaded end connection styles:
Flanged end connection styles:

All Flapper models are available with the flutter option. Flutter models are identified by a -FLTR suffix attached to the flapper model number.