Drillmax® Model F

Model F Plunger Type Float Valve (Piston or Dart)
 
The Model F is a plunger type float valve that allows constant fluid flow while drilling, yet provides an instant shut-off if the flow is stopped or reversed. The piston seal stops back flow when breaking connections and keeps cuttings out of the drill string to help prevent clogged bits. In normal drilling operations the Model F offers economy and durability.