
Reliable Automatic Float Valve Sub. Blowout Prevention: Automatically closes nozzle to prevent mud backflow and blowouts in drill string. Versatile Application: Connects to drill bit upper part or any necessary position in the drill string. 100% Quality Inspection: Every finished product undergoes strict visual inspection before shipment. OEM & Customization: Accepts OEM orders with full customization from samples or designs. Professional Manufacturer: Integrates R&D, production, and export with own production base. ISO Certified: Products meet ISO standards for reliability in petroleum exploration. Wide Size Range: Available in various sub O.D. sizes from 104.8mm to 241.3mm. Anti-Rust Packaging: Vacuum sealed with anti-rust oil, wooden crates, and desiccants for sea shipping.