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Drill Pipe Float Valve, Model GC/GCA

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The Model GC automatic-fill flapper valve uses a low-carbon steel automatic-fill key assembly that allows the pipe to fill from the bottom, reducing run-in time by eliminating the need to fill the string from the top. This fast-acting valve helps reduce the possibility of pulling a wet string – along with the associated safety hazards – and eliminates mud spill-over on the rig floor.

Model GCA incorporates the benefits of Models GC and GA, allowing automatic partial filling of the drill pipe from the bottom. This eliminates the need to fill the string from the top when running in the hole and measuring differential pressures when required.


  • Sizes 1F2R-5F6R
  • Auto-fill feature
  • GCA: ported style
  • Standard/H2S service
  • High-temperature/geothermal service