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API 6D Extended Stem Fully Welded Ball Valve

API 6D Extended Stem Fully Welded Ball Valve
Extended stem fully welded pipeline ball valves
API 6D Extended Stem Fully Welded Ball Valve API 6D Extended Stem Fully Welded Ball Valve API 6D Extended Stem Fully Welded Ball Valve API 6D Extended Stem Fully Welded Ball Valve

    The YFL API 6D extended stem fully welded ball valve has cylindrical body welded by forging materials, with two welding seams but without bolts and nuts to avoid potential leakage from body.

    The YFL buried type fully welded body ball valve is mainly used in natural gas, oil, coal, liquefied natural gas long distance pipelines transmission system and other industries with service life up to 30 years and without maintenance cost.

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  • Features
  • Specification

  • The YFL cylindrical body fully welded ball valve has fully welded cylindrical body with double welding seams avoids leakages from body;
  • The YFL forged steel fully welded ball valves has forged body to avoid shrinkage cavities, pin holes, cracks, sand holes and other defects;
  • Trunnion ball and floating seat design reduces the torque, ensures sealing performance under low pressure or without pressure and realizes better sealing with higher pressure;
  • Separated ball and stem design minimizes the impact on stem and minimizes operate torque;
  • Body and stem are double sealing and the secondary seal is fire safe;
  • Cavity pressure self relief when seat structure is spring loaded single piston effect;
  • Bidirectional sealing when seat structure is double piston effect;
  • Seat grease injection valve as subsidiary sealing device;
  • Multi-level structure of stem sealing with O-type ring and flexible graphite;
  • Double block and bleed structure to discharge through bleeding valve;
  • Full bore structure and reduced bore structure
  • Fire safe, anti-static and anti-blowout stem design;
  • Extended stem optional for underground installation;
  • Transit short pipe available for BW ends as request.


Extended stem underground fully welded ball valve Fully welded ball valves with sleeve pipeFlanged fully welded pipeline ball valve

Product range:

  • Size: 2"～56"
  • Pressure rating: Class 150～2500
  • End connection: RF RTJ BW
  • Bore: Full bore Reduced bore
  • Body materials: A105 LF2 F304 F316 F304L F316L F51 F53 F55 etc.
  • Seat materials: PTFE RPTFE NYLON DEVLON PEEK PPL FKM or metal to metal seal etc.
  • Operation: Bare stem Wrench gear electric pneumatic electro-hydraulic gas over oil actuator

Technical standards:

  • Design: API 6D
  • Face to Face: API 6D
  • BW ends: ASME B16.25 ASME B31.8
  • Flanged ends: ASME B16.5 ASME B16.47
  • Wall thickness: ASME B16.34
  • Fireproof test: API 607 API 6FA
  • Test and inspection: API 598 API 6D
  • Pressure and temperature rating: ASME B16.34

Related Tags :

Extended stem fully welded ball valves Buried type fully welded ball valves Cryogenic fully welded ball valves Long stem fully welded ball valves Forged steel fully welded ball valves Oil & gas pipeline ball valves
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