The Model "F" Drill Pipe Float Valve provides a positive and instantaneous shut-off against high or low pressure, assuring continuous control of fluid flow during drilling. A fast-acting plunger opens when the kelly is pulled out of the hole, then closes, eliminating breakage of a wet joint. The plunger type valve also prevents flowback when adding joints and keeps cuttings out of the drill pipe, preventing bit plugging while making connections. The likelihood of having to pull a wet string with its attendant safety hazards and expensive down time is eliminated. For normal drilling operations, the durable Model "F" is the most economical choice and is available in all sizes.
