Trunnion Ball Valve

API 6D Trunnion mounted ball valve is ideal for high performance in critical applications such as high temperature, high pressure, cryogenics, large sizes, serving the oil, gas, petrochemicals, wastewater, etc. We are a trunnion-mounted ball valve manufacturer in China, offering API 6D trunnion-mounted ball valves in various sizes and pressure ratings.

Features and Benefits

  • Tight shut-off sealing mechanism
  • Double Block and Bleed function
  • Low operating torque
  • Triple stem sealing system with 2 O rings & Packing
  • Self-relief of excessive cavity pressure
  • Fire safe tested
  • Blowout-proof ball seat stem construction
  • Anti-static provision design
  • Locking device for lever operation
  • ISO 5211 actuator mounting pad


  • Side-entry or Top-entry designs
  • Bolted body or welded body
  • DIB: DIB-1, DIB-2 seat
  • For low-temperature services, lip seals are provided.
  • Extended stem for underground service, high temperature, cryogenic

Standard Applications

  • Basic design: API 6D/ISO 14313
  • F–F dimensions: API 6D/ASME B16.10
  • End Flange: ASME B16.5
  • Bore diameter: API 6D/ISO 14313
  • Wall thickness: ASME B16.34
  • Test: API 6D/API 598


  • API 6D
  • CE: PED 97/23/EC
  • Fugitive emission: ISO 15848-1 BH CO1
  • Fire test: ISO 10497/API 607

Product Range

  • Nominal pressure: ASME Class 150 to 2500
  • Nominal size: NPS 2 to NPS 40 (DN 50 to DN 1000)
  • Body Material: Carbon steel, stainless steel, duplex stainless steel, high alloy steel, nickel-based alloy, alloy steel
  • Soft seat materials: RPTFE (Reinforced PTFE), Modified PTFE, Nylon 6, Nylon 12, DEVLON, PEEK
  • Metal seat materials: tungsten carbide, stellite

Leave Us Your Info

Could you please kindly fulfill the following information when enquiring:

Valve type (ball, gate, globe, check etc.), valve size, pressure class, valve material, and end connection (flanged, butt welding etc.)